Efficient Computation of Higher-Order Variational Integrators in Robotic Simulation and Trajectory Optimization
Efficient Computation of Higher-Order Variational Integrators in Robotic Simulation and Trajectory Optimization
复制标题
机器人仿真和轨迹优化中高阶变分积分器的高效计算
DOI:
10.1007/978-3-030-44051-0_40
复制
发表时间:
2020
期刊:
影响因子:
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通讯作者:
Murphey, T.
中科院分区:
文献类型:
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作者:
Fan, T.;Schultz, J.;Murphey, T.
This paper addresses the problem of efficiently computing higher-order variational integrators in simulation and trajectory optimization of mechanical systems as those often found in robotic applications. We developO(n) algorithms to evaluate the discrete Euler-Lagrange (DEL) equations and compute the Newton direction for solving the DEL equations, which results in linear-time variational integrators of arbitrarily high order. To our knowledge, no linear-time higher-order variational or even implicit integrators have been developed before. Moreover, analgorithm to linearize the DEL equations is presented, which is useful for trajectory optimization. These proposed algorithms eliminate the bottleneck of implementing higher-order variational integrators in simulation and trajectory optimization of complex robotic systems. The efficacy of this paper is validated through comparison with existing methods, and implementation on various robotic systems—including trajectory optimization of the Spring Flamingo robot, the LittleDog robot and the Atlas robot. The results illustrate that the same integrator can be used for simulation and trajectory optimization in robotics, preserving mechanical properties while achieving good scalability and accuracy.
DOI:
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发表时间:
2017
期刊:
影响因子:
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作者:
S. Ober
通讯作者:
S. Ober
DOI:
10.1109/robot.2002.1013413
发表时间:
2002
期刊:
Proceedings 2002 IEEE International Conference on Robotics and Automation (Cat. No.02CH37292)
影响因子:
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作者:
K. Yamane;Yoshihiko Nakamura
通讯作者:
Yoshihiko Nakamura
DOI:
10.1109/cdc.2015.7402357
发表时间:
2015
期刊:
2015 54th IEEE Conference on Decision and Control (CDC)
影响因子:
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作者:
Taosha Fan;T. Murphey
通讯作者:
T. Murphey