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1.
The optimal attitude control problem of spacecraft during its solar arrays stretching process is discussed in the present
paper. By using the theory of wavelet analysis in control algorithm, the discrete orthonormal wavelet function is introduced
into the optimal control problem, the method of wavelet expansion is substituted for the classical Fourier basic function.
An optimal control algorithm based on wavelet analysis is proposed. The effectiveness of the wavelet expansion approach is
shown by numerical simulation.
This work is supported by the National Natural Science Foundation of China. 相似文献
2.
S. S. Ravindran 《国际流体数值方法杂志》2004,45(1):21-42
In this paper, we present numerical approximations of optimal control of unsteady flow problems using sequential quadratic programming method (SQP) and time domain decomposition. The SQP method is considered superior due to its fast convergence and its ability to take advantage of existing numerical techniques for fluid flow problems. It iteratively solves a sequence of linear quadratic optimal control problems converging to the solution of the non‐linear optimal control problem. The solution to the linear quadratic problem is characterized by the Karush–Kuhn–Tucker (KKT) optimality system which in the present context is a formidable system to solve. As a remedy various time domain decompositions, inexact SQP implementations and block iterative methods to solve the KKT systems are examined. Numerical results are presented showing the efficiency and feasibility of the algorithms. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献