The Proceedings of Mechanical Engineering Congress, Japan
Online ISSN : 2424-2667
ISSN-L : 2424-2667
2022
Session ID : S115-01
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A study on effect of virtual actuator in optimization calculation for muscle force estimation
*Takuto HOSOYAAyuko SAITOSatoru KIZAWAYosikazu KOBAYASHI
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Abstract

The reserve actuators used in the Residual Reduction Algorithm of the musculoskeletal software OpenSim generate forces instead of muscles. In this study, we verified range of reserve actuator settings that can appropriately estimate muscle forces. A healthy adult man walked during the experiment. The results of the estimated lower limb muscle forces during walking indicated that the biarticular muscles, including rectus femoris and biceps femoris LH, and the monoarticular muscles which have many muscle attachment points, including gluteus maximus and psoas muscles, were not affected by the reserve actuators. While the monoarticular muscles, including soleus muscle, gastrocnemius muscle, tibialis anterior muscle, and biceps femoris SH, which have few muscle attachment points were easily affected by the reserve actuators.

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© 2022 The Japan Society of Mechanical Engineers
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