逐点线性化后退区间最优控制在飞机非线性控制中的-控制理论与应用.PDFVIP

24 1 Vol. 24 No. 1 2007 02 Control Theory Applications Feb. 2007 2007 , , (1. , 100084; 2. , 100074; 3. , 710072) : MIMO, . , . , , , , , . . : ; ; ; ; : V221.3 : A LSPRHO algorithms for the nonlinear movement of aircraft with thrust vector SU Hao-qin , YU Hong-yan , DENG Jian-hua (1. State Key Laboratory of Safety and Energy, Tsinghua University, Beijing 100084, China; 2. The No. 3 Institute of Astronautics, Beijing 100074, China; 3. Aeronautic College, Northwestern Polytechnical University, Xi’an Shaanxi 710072, China) Abstract: Conventional linear flight control systems do not satisfy nonlinear control requirement of aircraft with thrust vector, which is a multiple control redundances and nonlinear MIMO system. To control an aircraft with thrust vector, an algorithm of LSPRHO(linearization method at sampling point receding horizon optimal control) is set forth. Firstly, actuators, flight quality models and the approximate linear equations at sampling points can be effectively combined into an augmented time-invariant linear system, then LSPRHO takes errors and error rates between fly-states and model-states, actuators position limit and rate limit as optimal index. Based on the above deductions and the optimization technique, the control input for aircraft can be determined to make fly-states to track the state commands. The algorithm is proved to be robust and stable by simulations with air dynamic data of certain native aircrafts