模型预估探测控制在自动交会中的应用

本文讨论了模型预估探测控制(MPHC)的基本原理,推导了线性多变量系统的最优控制算法,对宇宙飞船自动交会控制系统进行了设计。从数字仿真结果表明,该系统具有较好的跟踪性能和抗干扰能力,实现起来也比较简单。

Application of Model Predictive Heuristic Control to Automatic Rendezvous of Spacecraft

The Principle of Model Predictive Heuristic Control (MPHC) technique arediscussed by Richalet 1]. Emara-Shabaik applied MPHC to Automatic rende-zvous of spacecraft 2]. This paper differs from Ref.2] in control strategy. Our approach is basedon a new real time algorithm for the linear least square solution of MIMO(Multi-input/multi-output) system. This paper differs from Ref. 2] in the design of automatic rendezvoussystem in the following points: 1. The "predictive" feature was practically non-existent in Ref. 2]. In thispaper's design the predictive feature is obviously present. 2. In the design of closed-loop system, this paper is believed to offer twomore advantages than Ref. 2]. (i) It decreases the amplitude of maximum engine thrust. (ii) It increases the flexibility in designing prediction horizon L, smoothingpoints NSM, control switching time TC, and weighting matrix Q. While in Ref.2] only one parameter t_P (model prediction horizon) can be selected. The numerical simulation results show that in this paper's design the systemperformance is improved, total fuel consumption is decreased and robustnessto external disturbances is satisfactory.