摘要
针对吸气式高超声速飞行器纵向通道强耦合、非线性、模型参数不确定等控制问题,首先建立系统模型,并对其进行输入输出精确线性化,将原模型转换为仿射型,实现系统输入输出间的解耦;然后采用线性二次型最优调节器的控制器结构,将其中的Q阵和R阵作为待优化的参数,定义系统的不确定性参数向量,根据系统的设计指标要求构造模型的随机鲁棒代价函数,通过蒙特卡洛仿真和粒子群算法对其进行寻优;最后针对飞行器的纵向通道非线性模型进行仿真实验,结果表明基于输入输出精确线性化和随机鲁棒设计的控制器不仅使系统具有良好的动态性能,而且具有较强的鲁棒性能和稳态性能。
According to strong coupling, nonlinear, model parameters uncertainties of the air-breathing hypersonic vehicle longitudinal channel, first, building the system models, transformed into an affine system through input-output exact linearization, eliminating the cou-pling between input and output of the system. Then using LQR that the matrix Q and R in the controller is to be optimized, define the uncer-tain parameter vector, construct the model cost function of SRAD based on the design index request of the system, and optimize it through MCE and PSO. Finally, the simulation results based on the longitudinal nonlinear model of the vehicle show that the controller designed not only has good dynamic quality, but also well in robustness and stability.
出处
《计算机测量与控制》
北大核心
2013年第4期955-958,共4页
Computer Measurement &Control
