摘要
常规线性飞控系统针对推力矢量飞机这样的多控制冗余、非线性MIMO系统,无法实现非线性控制．本文针对推力矢量飞机非线性系统,阐述了一种逐点线性化后退区间最优控制算法满足飞行品质要求．首先将作动器,飞行品质和逐点线性化的飞机线性模型综合实现在线建模,然后以飞行状态与预测状态之间的误差、作动器的位置限制和速率限制作为最优指标,最后以此为基础,根据最优控制原理计算当前时刻飞机最优控制指令,实现飞机非线性控制．采用国内某型号飞机气动数据验证此算法的鲁棒性和稳定性．
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.
出处
《控制理论与应用》
EI
CAS
CSCD
北大核心
2007年第1期53-58,共6页
Control Theory & Applications
基金
"十五"国防预研基金资助项目(102010106)
