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Optimizing Locomotion Controllers Using Biologically-Based Actuators and Objectives

delete2012-07-01
delete139
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OA
AI
S
Samuel R. Hamner
S
Scott L. Delp
V
Vladlen Koltun
DOI:10.1145/2185520.2185521delete
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Abstract

Abstract

En 中文
We present a technique for automatically synthesizing walking and running controllers for physically-simulated 3D humanoid characters. The sagittal hip, knee, and ankle degrees-of-freedom are actuated using a set of eight Hill-type musculotendon models in each leg, with biologically-motivated control laws. The parameters of these control laws are set by an optimization procedure that satisfies a number of locomotion task terms while minimizing a biological model of metabolic energy expenditure. We show that the use of biologically-based actuators and objectives measurably increases the realism of gaits generated by locomotion controllers that operate without the use of motion capture data, and that metabolic energy expenditure provides a simple and unifying measurement of effort that can be used for both walking and running control optimization.
Keywords:
physics-based character animation
biomechanics
musculoskeletal simulation
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Journal

ACM Transactions on Graphics cover
ACM Transactions on Graphics
IF:
9.5
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4.7K
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Stanford University
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Citations: 17.0W