飞行员滑模最优化控制行为特性分析

Characteristic analysis of optimal control behavior of pilot sliding

为了建立飞行员追踪控制策略模型,结合滑模控制和最优化控制的优点,提出了使系统从初始状态在切换超平面上的滑模最优化控制方法,该切换超平面随时间变化,并使系统只具有控制过程的滑模阶段,确保了系统的全局鲁棒性和稳定性.针对目标函数中加权矩阵的选取,改进了H∞控制中加权矩阵选取的随机搜索算法,得到了最优化控制加权矩阵的计算方法.为了使系统状态在最短时间内到达捕获控制切换超平面,采用滑模控制理论建立了飞行员捕获控制模型.建立了多输入多输出的从捕获任务到追踪任务的飞行员变策略控制模型,选取主要的控制偏差作为从捕获控制到追踪控制切换的判据.仿真结果表明,所提出的飞行员变策略控制符合其实际控制行为特征.

To built pilot tracking control strategy model, the combination of sliding model control characteristic and optimal control characteristic is adopted to propose a sliding optimal control method, and the time-varying sliding surfaces are designed so that the system state is on the sliding surface from the beginning of the motion without reaching phase. The system is robust and stable. A parameter selected method of weighting matrix on H∞ control is improved, by which the weighting matrix of linear quadratic optimal control is calculated. To drive the system state variables to the acquisition control switching surface in minimum time, the acquisition control strategy is bulled by sliding model control. The main error is regared as a judgement from acquisition control strategy to tracking control strategy. The simulation results show that the pilot variable stategy control is suitable to the real pilot control characteristic.