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Suboptimal Control for Discrete Linear Systems with Time-delay:A Successive Approximation Approach
作者姓名:TANG  Gong-You  WANG  Hai-Hong
作者单位:College of Information Science and Engineering,Ocean University of China,Qingdao 266071
基金项目:Supported by National Natural Science Foundation of P.R.China (60074001),and the Natural Science Foundation of Shandong Province (Y2000G02)
摘    要:A successive approximation approach for designing optimal controllers is presented for discrete linear time-delay systems with a quadratic performance index.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 without time-delay and time- advance terms.The optimal control law obtained consists of an accurate feedback terms and a time-delay compensation term which is the limit of the solution sequence of the adjoint equations. By using a finite-step iteration of the time-delay compensation term of the optimal solution sequence, a suboptimal control law is obtained.Simulation examples are employed to test the validity of the proposed approach.


Suboptimal Control for Discrete Linear Systems with Time-delay:A Successive Approximation Approach
TANG Gong-You WANG Hai-Hong.Suboptimal Control for Discrete Linear Systems with Time-delay:A Successive Approximation Approach[J].Acta Automatica Sinica,2005(3).
Authors:TANG Gong-You WANG Hai-Hong
Abstract:A successive approximation approach for designing optimal controllers is presented for discrete linear time-delay systems with a quadratic performance index.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 without time-delay and time- advance terms.The optimal control law obtained consists of an accurate feedback terms and a time-delay compensation term which is the limit of the solution sequence of the adjoint equations. By using a finite-step iteration of the time-delay compensation term of the optimal solution sequence, a suboptimal control law is obtained.Simulation examples are employed to test the validity of the proposed approach.
Keywords:Discrete systems  time-delay systems  optimal control  suboptimal control  successive approximation approach
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