摘要
针对近空间飞行器再入时飞行空域较大,为保证剧烈变化环境下的姿态控制能力,需采用脉冲推力器和气动舵进行复合控制。协调工作原理和特性不同的执行机构以满足系统性能指标。基于减小复合控制器构型影响考虑,采用前馈-反馈复合控制器,以气动舵子系统构筑前馈回路,将复合模式下的控制系统设计问题转化为RCS子系统单回路设计,并通过对极限环特性分析给出纵向非线性控制律设计方法。仿真验证表明了气动舵输出平缓、推力器满足最大工作频数限制、姿态误差小于0.5度。仿真结果证明,方法在处理含有异类执行机构的近空间飞行器复合控制律设计问题是有效的。
Near-space air vehicle reenter at a large range of airspace.To ensure the ability of controlling the attitude of the air vehicle in the severe changing environment,compound control of pulse engine and pneumatic rudder are used.It is urgent to coordinate the working principle with different characterized actuators,thus satisfying the performance index.Considering the influence caused by the compound controller＇s structure,feed-forward and feedback compound controller is adopted.and pneumatic rudder subsystem is applied in the feed-forward circuit.Thus,compound controller is conversed to the design of single circuit of RCS subsystem.And then,the vertical nonlinear control law is designed with the method of phase plane.The results of the simulation show that the pneumatic rudder works at a low frequency,the limitation set by the maximum working frequency of RCS is met and the inaccuracy of the attitude is less than 0.5 degree.Conclusion： this method is effective in the design of the compound control law of the near-space air vehicle with different kinds of actuators.
出处
《计算机仿真》
CSCD
北大核心
2010年第10期71-74,305,共5页
Computer Simulation
关键词
近空间
再入
复合
Near-space
Reentry
Compound
