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DTSTAMP:20230103T035306Z
LOCATION:Auditorium\, Level 5\, West Wing
DTSTART;TZID=Asia/Seoul:20221206T100000
DTEND;TZID=Asia/Seoul:20221206T120000
UID:siggraphasia_SIGGRAPH Asia 2022_sess153_papers_369@linklings.com
SUMMARY:Differentiable Simulation of Inertial Musculotendons
DESCRIPTION:Technical Papers\n\nDifferentiable Simulation of Inertial Musc
 ulotendons\n\nWang, Verheul, Yeo, Kalantari, Sueda\n\nWe propose a simple 
 and practical approach for incorporating the effects of muscle inertia, wh
 ich has been ignored by previous musculoskeletal simulators in both graphi
 cs and biomechanics. We approximate the inertia of the muscle by assuming 
 that muscle mass is distributed along the centerline of the muscle. We exp
 ress the motion of the musculotendons in terms of the motion of the skelet
 al joints using a chain of Jacobians, so that at the top level, only the r
 educed degrees of freedom of the skeleton are used to completely drive bot
 h bones and musculotendons. Our approach can handle all commonly used musc
 ulotendon path types, including those with multiple path points and wrappi
 ng surfaces. For muscle paths involving wrapping surfaces, we use neural n
 etworks to model the Jacobians, trained using existing wrapping surface li
 braries, which allows us to effectively handle the Jacobian discontinuitie
 s that occur when musculotendon paths collide with wrapping surfaces. We d
 emonstrate support for higher-order time integrators, complex joints, inve
 rse dynamics, Hill-type muscle models, and differentiability. In the limit
 , as the muscle mass is reduced to zero, our approach gracefully degrades 
 to traditional simulators without support for muscle inertia. Finally, it 
 is possible to mix and match inertial and non-inertial musculotendons, dep
 ending on the application.\n\nRegistration Category: FULL ACCESS, EXPERIEN
 CE PLUS ACCESS, EXPERIENCE ACCESS, TRADE EXHIBITOR\n\nLanguage: ENGLISH\n\
 nFormat: IN-PERSON
URL:https://sa2022.siggraph.org/en/full-program/?id=papers_369&sess=sess15
 3
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