Feedforward and feedback optimal control for nonlinear systems with persistent disturbances

被引:0
|
作者
Tang, Gong-You [1 ]
Gao, De-Xin [1 ]
机构
[1] Coll. of Info. Sci. and Eng., Ocean Univ. of China, Qingdao 266071, China
来源
Kongzhi yu Juece/Control and Decision | 2005年 / 20卷 / 04期
关键词
Computer simulation - Feedback control - Iterative methods - Nonlinear systems - Robustness (control systems);
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学科分类号
摘要
The optimal control problem is considered for nonlinear systems affected by external persistent disturbances. A successive approximation algorithm of designing feedforward and feedback optimal controllers is developed. By using the successive approximation approach, the original optimal control problem is transformed into a sequence of nonhomogeneous linear two-point boundary value (TPBV) problems. The obtained optimal control law consists of analytical linear feedforward and feedback terms and a nonlinear compensation term which is the limit of the adjoint vector sequence. By using the finite-step iteration of nonlinear compensation sequence, a feedforward and feedback suboptimal control law is obtained. Simulations show the result is more robust with respect to external persistent disturbances than the classical feedback optimal control.
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页码:366 / 371
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