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线性时变系统二次最优控制问题的保辛近似求解
引用本文:谭述君,钟万勰.线性时变系统二次最优控制问题的保辛近似求解[J].应用数学和力学,2007,28(3):253-262.
作者姓名:谭述君  钟万勰
作者单位:大连理工大学 工业装备结构分析国家重点实验室,大连 116023
摘    要:状态空间的最优控制体系是保守的,其近似算法应当保辛.提出了基于分段常值精细积分方法的保辛摄动近似方法,在同一框架下求解了线性时变LQ最优控制中的计算问题,即变系数矩阵Riccati方程和状态反馈方程.该算法是保辛的,具有很好的数值稳定性和精度.算例验证了算法的有效性.

关 键 词:线性时变系统    线性二次最优控制    变系数Riccati方程    区段混合能    状态传递矩阵    保辛摄动
文章编号:1000-0887(2007)03-0253-10
收稿时间:2006-09-26
修稿时间:2006-09-26

Numerical Solutions of LQ Control for Time-Varying Systems Via Symplectic Conservative Perturbation
TAN Shu-jun,ZHONG Wan-xie.Numerical Solutions of LQ Control for Time-Varying Systems Via Symplectic Conservative Perturbation[J].Applied Mathematics and Mechanics,2007,28(3):253-262.
Authors:TAN Shu-jun  ZHONG Wan-xie
Institution:State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, P. R. China
Abstract:Optimal control system of state space is a conservative system, whose approximate method should be symplectic conservation. Based on the precise integration method, an algorithm of symplectic conservative perturbation was presented. It gives a uniform way to solve the LQ control problems for linear time-varying systems accurately and efficiently, whose key points are solutions of differential Riccati equation and the state feedback equation with variable coefficient. The method is symplectic conservative and has a good numerical stability and high precision. Numerical examples demonstrate the effectiveness of the proposed method.
Keywords:linear time-varying system  LQ control  Riccati equation with variable coefficient  interval mixed energy  state transition matrix  symplectic conservative perturbation
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