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arXiv 2102.02065math.OC
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非线性切换系统最优控制问题的Riccati递推算法

Riccati Recursion for Optimal Control Problems of Nonlinear Switched Systems

Sotaro Katayama, Toshiyuki Ohtsuka

摘要:

针对非线性切换系统的最优控制问题,提出了一种有效的算法,该算法在给定的切换序列下同时优化控制输入和切换时刻。以开关时刻为优化变量,采用直接多次打靶法建立最优控制方程。推导了牛顿法中需要求解的一个线性方程,并提出了一种求解该线性方程的Riccati递推算法。所提出的方法的计算时间的比例线性的时间阶段的地平线的数量作为标准的Riccati递归。数值实验表明,所提出的方法收敛的计算时间明显短于传统的方法。

英文摘要:

We propose an efficient algorithm for the optimal control problems (OCPs) of nonlinear switched systems that optimizes the control input and switching instants simultaneously for a given switching sequence. We consider the switching instants as the optimization variables and formulate the OCP based on the direct multiple shooting method. We derive a linear equation to be solved in Newton's method and propose a Riccati recursion algorithm to solve the linear equation efficiently. The computational time of the proposed method scales linearly with respect to the number of time stages of the horizon as the standard Riccati recursion. Numerical experiments show that the proposed method converges with a significantly shorter computational time than the conventional methods.

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