https://www.shaosiyuan.com/course-projects daily 0.75 2022-01-17 https://www.shaosiyuan.com/course-projects/robotic-arm monthly 0.5 2020-12-06 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602033744494-SHBBFJN8WIZ7Q28KMZTS/ME250.JPG Course Projects - Robotic Arm Performance at the gameday https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1603175176873-NX4S2E0FI138SJOGTBHO/AllDesigns_Oct20.PNG Course Projects - Robotic Arm https://www.shaosiyuan.com/course-projects/safety-line monthly 0.5 2020-11-03 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602043405684-NNAOPDPZ0PP0KN19RH2D/Model.JPG Course Projects - Safety Line https://www.shaosiyuan.com/course-projects/reflection-over-safety-line monthly 0.5 2021-06-30 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602043405684-NNAOPDPZ0PP0KN19RH2D/Model.JPG Course Projects - Reflection over Safety Line https://www.shaosiyuan.com/course-projects/airpuck-and-hovercraft monthly 0.5 2020-11-24 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604381636886-E6RY30IUY1QYY0XPV6U8/IMG_4318.JPG Course Projects - Airpuck and Hovercraft https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604381631884-D43GABN1KHSC2LSB5ZHI/IMG_4317.JPG Course Projects - Airpuck and Hovercraft https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604381637700-C9S1O352510G0JWCC9F7/IMG_4321.JPG Course Projects - Airpuck and Hovercraft https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604381641838-D496T2Q4QIAJ5ZHKHAXQ/IMG_4326.JPG Course Projects - Airpuck and Hovercraft https://www.shaosiyuan.com/course-projects/magnetic-levitation monthly 0.5 2021-08-11 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1625028552235-7V3X9Q44ZFNKWS046RPR/MagLev_MechatronicsDiagram.jpg Course Projects - Magnetic Levitation - Make it stand out x indicates vertical position https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1625021657634-ZS2VD4EFJB0VMEZN2GF1/MagLev.jpg Course Projects - Magnetic Levitation Magnetic leviation system diagram https://www.shaosiyuan.com/course-projects/inverted-pendulum monthly 0.5 2021-08-11 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1625706268386-CTL3US3212PYQGWVU5ZZ/SwingerControllerEffort.png Course Projects - Inverted Pendulum - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1625709000435-VKF6Y3U0N0N4MUT39XEG/LabViewCode.png Course Projects - Inverted Pendulum - Make it stand out Figure 3 LabView Code https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1625697727195-WKAX76DWZ22QTKQFUAH5/FourDifferentModels.png Course Projects - Inverted Pendulum - Make it stand out Figure 2 Testing LQR with different levels of model https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1625709543377-MB9MF8J7PRK9HAIRVFGZ/InvertedPendulumFrontPanel.jpg Course Projects - Inverted Pendulum - Make it stand out Figure 4 Front panel of LabView monitors the state space, controller effort and switching algorithm https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1625629052965-H1NFQMUA3WZT7JJST9JF/Thumbnail.png Course Projects - Inverted Pendulum Figure 1 Rotary inverted pendulum (Oltean) https://www.shaosiyuan.com/course-projects/non-required-courses monthly 0.5 2021-07-30 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627661926139-ZRL1H1K6UXTDI3ZXBFW4/MATH471Project.jpg Course Projects - Non-required Courses - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.shaosiyuan.com/course-projects/jumping-with-frictional-contact monthly 0.5 2022-01-17 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/cedaec96-54e0-45c5-86c7-5830f5cad770/LagrangianDynamics_Trimmed.png Course Projects - Jumping With Frictional Contact - Make it stand out Figure 2. Free body diagram https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/f954c834-5455-4929-a283-ed66253b60b3/FinalDraft_Trimmed.jpg Course Projects - Jumping With Frictional Contact - Make it stand out Figure 1. A point mass is constrained on a rail. As the spring releases, the rail jumps. https://www.shaosiyuan.com/course-projects/category/ME551 monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Health monthly 0.5 https://www.shaosiyuan.com/course-projects/category/VM350 monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Ornithopter monthly 0.5 https://www.shaosiyuan.com/course-projects/category/VM250 monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Design+Thinking monthly 0.5 https://www.shaosiyuan.com/course-projects/category/ME350 monthly 0.5 https://www.shaosiyuan.com/course-projects/category/ENGR100 monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Term+Project monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Travel monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Relationships monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Mini+Project+%26+Fast+Prototype monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Ornithopter+Tree monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Fast+Prototype monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Mini+Project monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Culture monthly 0.5 https://www.shaosiyuan.com/course-projects/category/Sports monthly 0.5 https://www.shaosiyuan.com/moments-mechanical daily 0.75 2021-07-28 https://www.shaosiyuan.com/moments-mechanical/compliantgripper monthly 0.5 2020-10-31 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1601850890834-FNTK9ARK2J2XBZ249N75/GripperSynthesis_9-1.jpg Moments Mechanical - Compliant Gripper Synthesis The GeoGebra file was created 2020 Feb. Maybe you can play with it in this link https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1601850634418-GQIRNR8AL0I9OLJXFPHT/IMG_4880.jpg Moments Mechanical - Compliant Gripper Synthesis https://www.shaosiyuan.com/moments-mechanical/die-forelle monthly 0.5 2020-10-31 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1601849157008-TQLV7W21TD77HP1ZU55O/IMG_4871.JPEG Moments Mechanical - Die Forelle A 3D printing accident gave life to a trout. https://www.shaosiyuan.com/moments-mechanical/compliant-iris monthly 0.5 2020-10-31 https://www.shaosiyuan.com/moments-mechanical/ellipse-drawer monthly 0.5 2020-10-31 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1601873307844-SHDDJVFDBJMCAQUEDRCU/Ellipse+Drawer Moments Mechanical - Ellipse Drawer https://www.shaosiyuan.com/moments-mechanical/davincicatapult monthly 0.5 2020-10-31 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1601854002399-2A7SJVOMAALKE7RJ6MYD/Da+Vinci%27s+Catapult+%28LEGO%29 Moments Mechanical - Da Vinci’s Catapult https://www.shaosiyuan.com/moments-mechanical/metronome monthly 0.5 2020-10-31 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602025992372-EVGNRF9W58LE1U4VU5NH/MetronomeMechanism.png Moments Mechanical - Metronome Weight driven metronome. Weight hangs over the black pulley. One should fix the orange axle before starting the metronome. The blue components and green pendulum form an escapement pair, which both controls the speed and produce “tick tick” sounds. When not operating, the escapement pair automatically locks the red train. Then, one can unlock the orange axle, and rotate it to pull up the weight. https://www.shaosiyuan.com/moments-mechanical/safe monthly 0.5 2020-10-31 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602090803693-AJPM9R83M6YGQQXDD6XK/Project1.png Moments Mechanical - Safe https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602106068216-VFUW79B395J2HTO79E7U/IMG_2812.jpg Moments Mechanical - Safe This is the first prototype. I used the yellow rubber band to put some damping onto the middle disk (blue disk in first picture), so that it will stay in position when stopper is released. https://www.shaosiyuan.com/moments-mechanical/3-upu-kinematics monthly 0.5 2020-12-03 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602034320949-WW9ATBL5KK22VX6HFYFO/State1.png Moments Mechanical - 3-UPU Kinematics https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606968078453-UELJTMF26344AU8LLUBN/IMG_6081.jpeg Moments Mechanical - 3-UPU Kinematics https://www.shaosiyuan.com/moments-mechanical/lego-ferrari monthly 0.5 2020-10-31 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604123877940-X7D9NXKBXI2W2LCSGKW1/SiyuanShao_7yearold.jpg Moments Mechanical - Embed Motors and Gearbox into LEGO Ferrari https://www.shaosiyuan.com/jumping-vehicle daily 0.75 2020-12-03 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606697565221-8CC6E6T7IS0QHNM5Y7RQ/image-asset.gif Jumping Vehicle https://www.shaosiyuan.com/jumping-vehicle/let-go monthly 0.5 2020-11-02 https://www.shaosiyuan.com/jumping-vehicle/14th-iteration monthly 0.5 2020-11-02 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604304288064-RT82JGL73WC0CW775VXG/BacktoSJTU.JPEG Jumping Vehicle - 14th Iteration https://www.shaosiyuan.com/jumping-vehicle/float-on-the-sand monthly 0.5 2021-08-26 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602111074207-NE85G1C63EZHQ6Y31NZT/SkiingBoardIntroduction.png Jumping Vehicle - Float on the Sand Figure 1. The jumping vehicle is on the right-hand side (greyed out). The test setup is on the left-hand side (rail + slider). The test subject is the red component that touches the sand. https://www.shaosiyuan.com/jumping-vehicle/we-failed monthly 0.5 2020-12-03 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606972109037-H1GDKQCEM385XWVZNNGG/WeFailed.jpeg Jumping Vehicle - We Failed https://www.shaosiyuan.com/jumping-vehicle/early-attempts monthly 0.5 2020-12-03 https://www.shaosiyuan.com/towards-ornithopter daily 0.75 2022-11-17 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606697383813-AWR05TE63575DOWXXYOL/image-asset.gif Towards Ornithopter https://www.shaosiyuan.com/towards-ornithopter/2021-06-12-test-4 monthly 0.5 2022-09-06 https://www.shaosiyuan.com/towards-ornithopter/acknowdgement monthly 0.5 2021-07-29 https://www.shaosiyuan.com/towards-ornithopter/thrust-analysis monthly 0.5 2021-07-27 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627349888776-HFDWW5ZXUYCCNEA1WIBX/Eq2.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627355301875-CSXFNPBP0DZJV4D7G92I/a_s.png Towards Ornithopter - Thrust Analysis - Make it stand out Figure 4. Acceleration measurement at sensor position https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627354572572-OTXGQWIZ6TFMVE1QJCMF/a_s.png Towards Ornithopter - Thrust Analysis - Make it stand out Figure 1. Measured acceleration at sensor position. Each color corresponses to a different flight test. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627346652552-3OWOXUR2Y0FRLQZ1XMP6/Eq1.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627343660598-KMOTFYCRDTQ2WAVXPVP4/HelperFreeBodyDiagramtemp.png Towards Ornithopter - Thrust Analysis - Make it stand out Figure 2. Free-body diagram of ornithopter about its center of mass C https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627349906052-GG1NABAPXR6LO64ZMOJK/Eq3.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627346697998-G4UIIZ8LMPKMJ9J31URR/Eq5.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627354855947-0TA47OE0O6KRE9D8G9GW/Pitch.png Towards Ornithopter - Thrust Analysis - Make it stand out Figure 3. Flight test data for pitch angle θ is almost a sine function https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627346685454-XUE0C4HUMID5QEREOKE9/Eq4.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627346842170-83YFLN76CATZJZMJQ29Q/Eq6.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627346859854-A8G4YMA6C5TBVJ28FD5W/Eq7.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627346920828-90XWYRP3IQ7MQ6JN68X8/Eq8.jpg Towards Ornithopter - Thrust Analysis - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.shaosiyuan.com/towards-ornithopter/final-tests monthly 0.5 2021-08-11 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626993658249-KX1CDTZ38TBO4H40F1LE/ElbowGap.jpeg Towards Ornithopter - Final Tests - Figure 3. Cover gaps between upper arm and lower arm with elastic membrane. Uncovered gaps would generate unwanted vortex and screw up the propulsive flow structure. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627000565556-2TIZYYSX3MZ7KRFR1IK8/ALinkGear.png Towards Ornithopter - Final Tests - Make it stand out Figure 5. Increasing length of crank of the crank-rocker mechanism. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626993194079-5E09CJQAKJZAACO9RYZ6/FuselageSkin.jpeg Towards Ornithopter - Final Tests - Figure 2. Cover fuselage with vaccum-formed streamlined skin https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626998211356-WQ4OJZS0IDY2Q4QGT69O/Equations.png Towards Ornithopter - Final Tests - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.shaosiyuan.com/towards-ornithopter/serial-elastic-compound-gear monthly 0.5 2021-07-21 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626803388255-T73NEG93VR5080YS4NA1/6DoF.png Towards Ornithopter - Serial-Elastic Compound Gear - Make it stand out Figure 3. Six directions of compliance https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626795616934-FA4RJVYUT20GKGNP7AV7/Equation1_Trimmed.jpg Towards Ornithopter - Serial-Elastic Compound Gear - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626800481821-4TVQT62PKA1YMKEIYHI4/Candidates.png Towards Ornithopter - Serial-Elastic Compound Gear - Make it stand out Figure 2. Two candidates of serial elasticity https://www.shaosiyuan.com/towards-ornithopter/controller monthly 0.5 2021-09-12 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626818926167-WOF88E8NADVLWJ5WONW0/FlowChart.png Towards Ornithopter - Controller - Make it stand out Figure 1. Final version of overall controller. Created on late May. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626820424010-O22YD73XPPFC2HHAQ00B/TestsFlightsInMay_2000p.png Towards Ornithopter - Controller - Make it stand out Figure 2. 13 sets of data collected in May. Earlier tests didn’t have an onboard data collection system. https://www.shaosiyuan.com/towards-ornithopter/tail-kinematics monthly 0.5 2021-07-20 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626561868323-957MMEWZY4HOKUCB434S/Pitch.png Towards Ornithopter - Tail Kinematics - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626559699196-KCR5GZJORR95JMV4PFDC/CAD%26Diagram.png Towards Ornithopter - Tail Kinematics - Make it stand out Figure 1. The tail is a 2 DoF parallel manipulator (I ignore the 2 local roll DoF on the S-S couplers). It works as an elevator and rudder by changing its pitch and yaw. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626561168155-YQEGBQ0JDBEF6SL9R2TH/Example.png Towards Ornithopter - Tail Kinematics - Make it stand out Figure 2. Visualization of one solution. MATLAB code can be found here. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626561823402-UAKC6YZGLYPZS3KZ78LP/Yaw.png Towards Ornithopter - Tail Kinematics - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.shaosiyuan.com/towards-ornithopter/counter-intuitive-stability monthly 0.5 2021-07-20 https://www.shaosiyuan.com/towards-ornithopter/circuit monthly 0.5 2021-07-17 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626206100853-O0T0JXCL09JRUJTCJMOR/PCB.png Towards Ornithopter - Circuit - Make it stand out Figure 2. My designed PCB. 5$ for 10 pieces. Incredibly affordable. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626206517474-WID0PX2AD90LMYXAWADD/IMG_8261.jpeg Towards Ornithopter - Circuit - Make it stand out Figure 3. Circuit on the fuselage. Fabricated in May. Photoed on July 13 2021. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1626205497788-GZPFPWCK969ILA5ZIC3L/Circuit+Schematics.png Towards Ornithopter - Circuit - Make it stand out Figure 1 Ornithopter circuit. https://www.shaosiyuan.com/towards-ornithopter/active-pitch monthly 0.5 2021-07-13 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1617139742945-07U18O46U05ZZCLOAW3I/Annotation.png Towards Ornithopter - Active Pitch https://www.shaosiyuan.com/towards-ornithopter/first-crash monthly 0.5 2021-03-30 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1617136466006-558HV2AI1J7T5VVN2BUD/FuselageAssemblyPlatform.jpeg.jpeg Towards Ornithopter - First Crash Assembly platform for fuselage https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1617136992544-VY7D4V4GINX1J6ISJQX1/Matthew.jpg Towards Ornithopter - First Crash https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1617136446917-T0XCRZOP0IDKPJBUHE23/WingAssemblyPlatform.jpeg Towards Ornithopter - First Crash Assembly platform for wing https://www.shaosiyuan.com/towards-ornithopter/ae405 monthly 0.5 2021-07-13 https://www.shaosiyuan.com/towards-ornithopter/wing-structure monthly 0.5 2021-01-20 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611101749856-B4N3EBOAMVBPKLFDPX3O/image-asset.jpeg Towards Ornithopter - Wing Structure - 1. Soak the veneer in boiling water until it get soft. Then press it into a metal tube. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611101815171-G0FH247VW6A85L9AIYA4/IMG_6292.jpeg Towards Ornithopter - Wing Structure - 3. Check the curvature. If not curved enough, repeat above steps with binder clips. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611103238764-V70SWDNQI8WQWE1N5AV5/image-asset.jpeg Towards Ornithopter - Wing Structure Monokote attached well on the veneer. The veneer stripe is very light. The soldering iron works quite well for a thin stripe contact surface. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611101310886-GAQ0X2ONBH2UV735IGVM/IMG_6285.jpeg Towards Ornithopter - Wing Structure - 2. Bake the tube. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611106210133-TVZTG3CQ9JQ07OR0O115/Temp.jpg Towards Ornithopter - Wing Structure https://www.shaosiyuan.com/towards-ornithopter/fitting-and-constraint monthly 0.5 2021-01-20 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1610993856260-5N8475QGUSWWOTCDNQRD/Misalignment.jpg Towards Ornithopter - Fitting and Constraint https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611094134919-5P2H2WNVZY3BXZPRDNIX/image-asset.png Towards Ornithopter - Fitting and Constraint This is a realistic illustration of what I fabricated. The blue surface highlighted the gap between bearing and carbon fiber sheet. Note that the carbon fiber sheet deforms a little, because the pin is pushing it downward while the bearing flange is pushing it upward. The glue is drawn as an orange ring. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611095124478-LPZMVFP10AHQOZH0C5XF/IMG_6206.jpeg Towards Ornithopter - Fitting and Constraint https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1611095139841-N0BKMUWHCJ2YFPYQXUJC/image-asset.jpeg Towards Ornithopter - Fitting and Constraint https://www.shaosiyuan.com/towards-ornithopter/reflection-over-spanning-tree-method monthly 0.5 2020-12-06 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1607224853003-IUMEYMWLCW4AYUAGBPR4/Graph_Simplified.jpg Towards Ornithopter - Reflection Over Spanning Tree Method Simplified graph https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1607220884701-TS6INUL4E45PZHJYT47X/Graph.jpg Towards Ornithopter - Reflection Over Spanning Tree Method The local graph of gearbox (excluding other progress in aircraft dynamics and wing structure). The numbers on directed edges (arrows) indicates the time sequence. For annotated graph, please see this file https://www.shaosiyuan.com/towards-ornithopter/foreword-hobbyist-and-professional-designs monthly 0.5 2020-12-03 https://www.shaosiyuan.com/towards-ornithopter/gearbox monthly 0.5 2020-12-06 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606975589781-Q1XTMX2KZJO3JB1H0AQE/image-asset.jpeg Towards Ornithopter - Gearbox Glue climbs onto the teeth https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606974231170-PPU98OQFZ4JRSTH05880/TowardsGearbox.jpeg Towards Ornithopter - Gearbox All the wrong parts https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606975626955-HQ51O0MGH1INXJ3WXWCA/IMG_5845.jpeg Towards Ornithopter - Gearbox cocentric-helper component stuck in the bore https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606977766120-DHME2T263J8EYSWXW1CW/IMG_5928.jpeg Towards Ornithopter - Gearbox I finally get a compound gear https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606976662836-IH3KXPIPVINST270KRO8/IMG_5898.jpeg Towards Ornithopter - Gearbox Lathed helper components https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1607225650832-K6ORT0NA7SSHZC6VTKLV/FlowChart_CompoundGear.jpg Towards Ornithopter - Gearbox My operating procedure is very friendly to a lathe novice like me. https://www.shaosiyuan.com/towards-ornithopter/find-the-center monthly 0.5 2020-12-03 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1603255266461-WBDELP9665962QP6BHI4/Ideal_Croped.png Towards Ornithopter - Find the Center Ideal https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1603255746557-ASET2XHVW1QZ1YU6WN6R/IMG_5944.jpeg Towards Ornithopter - Find the Center The shaft breaks https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1603255276850-Z56YY624OCECUYKFO5XX/Realistic_Croped.png Towards Ornithopter - Find the Center Realistic https://www.shaosiyuan.com/towards-ornithopter/aristotle-and-glider monthly 0.5 2020-11-23 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602009714310-ZQNOFLCSII5FV4EJ1W35/GliderThinking_ScreenShot.jpg Towards Ornithopter - Aristotle and Glider https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1601915942233-YJX72EL2U8T7CVUNE3N0/IMG_5777.JPEG Towards Ornithopter - Aristotle and Glider - Crashed in a good shape. I repaired it in 2 minutes. Crashed in a good shape. I repaired it within 2 minutes. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1601913774484-4F9ENLFOAXEYRQPLN5B3/Glider Towards Ornithopter - Aristotle and Glider https://www.shaosiyuan.com/towards-ornithopter/ornithopter-linkage-synthesis monthly 0.5 2020-11-23 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602741585260-H8I6QS38OMEXCU9QTN6W/Details.png Towards Ornithopter - Ornithopter Linkage Synthesis For crank-rocker mechanism (CR): The red bar is the input. It rotates with gear. The 3-joint bar on the left is called coupler. The inner wing is fixed onto the output bar of CR. The “ground” means “ground link”. It is fixed on fuselage. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606096274245-U8XUAU2R01LPE2WT4BGC/KinematicSizing.png Towards Ornithopter - Ornithopter Linkage Synthesis 4-bar linkage has only three design variables: a/d, b/d, c/d. They are bar length normalized by ground link. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1602740058475-WGV3W1O7076K0X5DTSAW/OrnithopterTesting1e2Frame.gif Towards Ornithopter - Ornithopter Linkage Synthesis The up-and-down motion of ornithopter is calculated based on C. Altenbuchner’s case study https://www.shaosiyuan.com/towards-ornithopter/flapping-wing-aerodynamics monthly 0.5 2021-07-27 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606098669816-MRM55NBJJTSRSETD40J0/Aerodynamics_OneNote.jpg Towards Ornithopter - Flapping Wing Aerodynamics https://www.shaosiyuan.com/about daily 0.75 2023-02-20 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627432588532-7K6W7PTC9QZYCM2GXNQZ/SiyuanShao.jpg About - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.shaosiyuan.com/home daily 1.0 2021-07-27 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604124833716-D11VVEYP52XJE7YSV4FO/MetronomeMechanism.jpg Home https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604122393260-Z8J3PISX2J97WXF3RAHH/IMG_4655.jpg Home https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604124674596-R527GFVRNEMNUJI6IMVT/Mechanism1.jpg Home https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1627356973679-NPBKXCZ1THEW09HS21VL/HomePage.jpg Home https://www.shaosiyuan.com/contact daily 0.75 2020-10-23 https://www.shaosiyuan.com/life daily 0.75 2022-01-17 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1652205631339-FN2GSK9XHWFBAG6C3WRG/ChopinOp22.jpg Life https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1642433771015-DZDJ4TQB5JQAWXT1AVE8/ARTDES170_Final_93439034.jpg Life I love my negative space drawing https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/2ac2c4f1-798f-4c95-b760-20c8caa36234/PerspectiveDrawing.png Life It's interesting to draw things distorted in perspective drawing https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1606097681594-2BGN8MB0SECVI7I2A05J/IMG_5952.jpeg Life I spent too much time struggling with graph theory, but still, I cannot really understand it. Really sad that I didn't spend enough time practicing piano. Forgive me, Joonghun. Nov. 11 2020 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197436563-55ZUI7LHH7RKC0C67X10/R-11485489-1517164573-6898.jpeg.jpg Life Bach, too difficult for a first-year adult beginner. Once again, Joonghun overestimated me. Oct. 10 2020 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197455218-MLBRGI694J0Q8T1S76C9/Screenshot+2020-10-10+014956.png Life More time devoted to mechanical design and piano. Very good. Sept. 20 2020 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197499576-LDMVW74VUCUDCKT0RUC0/FXB_1_PersonalWebsite.png Life Francois-Xavier Bagnoud Building is my favorite building on campus. I miss it so much during COVID shutdown. So I CAD one. May 3 2020 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604807297477-X51S0S8NI2UF9N491VAX/Diary.jpeg Life Ornithopter! Ornithopter! Ornithopter! 31 Jan. 2020 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604199345244-HJM7KYZD2A9V1IWP5CXG/Afanassiev.jpg Life Afanassiev's unique recording https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197544225-RCEWGUDDGCF2GB7BC4EH/IMG_3572.JPEG Life Another day in Shanghai Natural History Museum. Mar. 30 2019 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197559421-UGOMPRYDMLL03R422OX1/IMG_4689.JPEG Life Thank you my friends for the 14 years we walked together. Dec. 31 2019 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604199013249-UT8K7QUKYICV2R85BNCH/Never_Too_Late_To_Start.jpg Life Never too late to get started. Sept. 2 2019. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604199472124-VUWK8BK2TOQJIYO98WIS/Hello_AnnArbor.jpeg Life Hello Ann Arbor! Aug. 28 2019 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197467079-LZNMY7SYQDD6PLYKGPO8/TroyesLife+%281%29.jpg Life For a month, I cooked with a hot-pot. Feb. 19 2019 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197416979-UQB4F0K69TZ1KW7QTGIV/K466_1.jpg Life Cruel and dreadful K.466:1. Feb. 21 2019 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197487397-S8PJMXZFIHA08BHAU5N5/IMG_3188.JPEG Life Michel Dalberto changes the program and plays D.946. Lucky day. Feb. 14 2019 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197468423-R3MQ0PPEC8NJHNOVQZFN/IMG_3093.jpeg Life Je ne parle pas français... Jan. 29 2019 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197413789-EQTTRY01B811BK6IHV5K/617yNbFnfQL._SL1200_.jpg Life Bruyères is so Shanghai. Nov. 30 2018 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604379448357-8LJWIJWZDIIRXPSIPXTQ/ProfBarnet_Farewell_1.JPG Life Goodbye Prof. Barnet! May 3 2018 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197507820-50BZC1KSRV63N89YBMHP/IMG_1893.JPG Life Exploring the river valley. May 1 2018 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197432649-WTM71YCV2I6VQ7RALVJJ/IMG_1962.JPEG Life It is so empty today. May 24 2018 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197517522-PGACRSN45ZHQWTHKJ14K/IMG_2798.jpeg Life Very hard to find a book that illustrates the designer side of Leonardo da Vinci. Dec. 3 2016 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604202029906-TPCWCMUFVPAX6Z87QVT4/Brendel_Schubert_Album.jpg Life Brendel played Schubert's posthumous work. My favoriate album. Oct. 2 2017 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197533841-MH80PKJAQ03TMGGWKA3H/IMG_2521.JPEG Life Shanghai Library almost becomes my second home. Mar. 5 2016 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197428024-G19CV4R10JZOY38NSKHJ/2016-08-12+100722.jpg Life In our Shanghai. In the trends that never end. https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/1604197409358-KAYRDGAS3ZQN67LWRO86/SergioFiorentino.jpg Life Fiorentino played D.960. Gorgeous. Sept. 12 2017 https://images.squarespace-cdn.com/content/v1/5f7618c5efb7e9352f6a1ac9/8b18afe8-8504-4444-afb7-0b0eb95ac0ea/Sand.jpg Life What did I write on the Sand? Oct 22 2023 https://www.shaosiyuan.com/allapplicationdocuments daily 0.75 2021-10-09 https://www.shaosiyuan.com/new-page-1 daily 0.75 2022-11-11 https://www.shaosiyuan.com/new-page daily 0.75 2023-10-20