飞机纵向运动的结构化H_∞控制设计

Structured H∞control for an aircraft longitudinal motion

针对大型飞机的纵向运动控制问题中涉及的稳定性要求、扰动抑制性能、系统带宽限制、以及飞机的过载性能要求等多方面控制目标,提出采用结构化H_∞综合的控制策略。所采用的结构化H_∞综合的控制策略是一种最新的H_∞综合控制理论,不但保持了传统的H_∞综合设计理论的优点,设计时可以综合考虑多方面的性能要求,并且可以根据实际需求设计控制器的结构,保证控制器具有比较低的阶次和复杂度,具有现实的可应用性。以波音系列飞机为例,设计了一个满足综合设计目标的结构化H_∞控制器,并通过仿真分析验证了这个控制设计的性能,结果显示,给出的结构化H_∞控制器具有良好的鲁棒性和稳定性能,并且飞机的过载能够跟踪给定的参考模型。同时结构化H_∞控制设计思路可以为其他一般系统的控制设计提供一定的参考,其中的权函数选择方法也可为其他系统的结构化H_∞控制设计提供借鉴的设计实例。

Aiming at the longitudinal motion control of the large aircraft such as the stability requirements,disturbance rejection performances,system bandwidth limitation,altitude maintenance and tracking performances,we propose a control strategy using structured H∞control.The theory proposed in this paper can maintain the benefits of the traditional H∞synthesis theory,taking multiple performance requirements into consideration comprehensively,and design the structure of the controller according to the actual demand,it ensuring the controller a low order and complexity.It took Boeing series aircraft as an example,and designed a structured H∞controller satisfying the integrated design objectives.Also,it verifies the performance of the control design by simulation analysis and the results show that the structured H∞controller designed in this paper has a better tracking and stability performance.The design idea of the structured H∞controller in this paper is a reference for other controller design of general systems,and the selection method of the weight function is a design example for other structured H∞controller design.