对于飞行器随环境改变而参数变化范围较大的问题,研究采用鲁棒控制方法进行控制律设计。重点研究被控对象不确定的建模问题。将飞行器参数变化视为飞行器对象的不确定性,分别给出了时域和频域两种不确定性的建模方法。采用时域状态空间模型不确定性的线性分式变换描述方法,对某飞行器进行了大包线范围的综合鲁棒控制律设计。设计仿真结果表明,控制系统不但具有鲁棒稳定性,而且具有鲁棒性能。

Applying robust control design methods to large envelope flight control law of aircraft whose model parameter varies greatly with flight condition was studied in this paper. Representation of time domain based uncertainty of state space model and representation of frequency domain based uncertainty of transfer function matrix model were conducted respectively. A linear fraction transformation form that uses interpolation was presented. A robust lateral direction flight control law was designed for certain aircraft. The simulation results show the control system is stable and performance robust, which proves effectiveness of the method.