广义预测自适应控制器在导弹控制系统设计中应用

将一种新的广义预测自适应控制算法应用于快速时变的导弹控制系统设计中。讨论了设计参数对控制系统性能的影响;针对自适应控制信号过大,提出了改进方案,增强了系统的鲁棒性和抗干扰能力。大量的数字仿真结果表明:运用该方案设计的导弹控制系统具有很好的跟踪性能和强的抗干扰能力;对系统阶次、参数、时延和采样周期的变化具有很强的鲁棒性;自适应算法中,对验前知识要求少,实现起来也比较简单。

GENERALIZED PREDICTIVE ADAPTIVE CONTROLLER APPLIED TO A MISSILE CONTROL SYSTEM

The generalized predictive contrller ( GPC) appears to be more robust than conventional adaptive controller in dealing with systems having varying and / or mismodelled dynamics. In this paper, a robust GPC law is combined with a robust parameter estimator to provide a practical adaptive control algorithm, which is applied to a ground air missile autopilot control system having fast time-varying dynamics. The influence of design and tuning parameters on the controller performance is analysed for setpoint tracking and disturbance rejestion, Aband-pass estimator filter and a controller filter are introduced into the GPC strategy for the purpose of improving the reliability of parameter estimation, providing robustness to model-plant mismatch and tailoring the rejection of disturbances, thus reducing the possibility of input oscillations and indeed saturation. Simulation results illustrate the good performance and the excellent properties of the presented control scheme, particularly its ability to cope with varying and mismodelled dynamics, variations of model order and high level disturbances.