定量反馈理论在重构飞行器控制中的应用

Application of the Quantitative Feedback Theory in Control of Reconfigurable Aircraft

摘要:

定量反馈理论(quantitative feedback theory,QFT)作为一种频率域鲁棒控制技术,综合考虑了对象的不确定性范围和对系统的性能指标要求,以定量方式在Nichols图上展开分析与设计,从而保证了设计结果具有稳定鲁棒性;而当某处喷管失效时,作用在飞行器上的控制力矩所受的影响可看作是不确定对象鲁棒性问题的扩展,因此,考虑喷管故障时的重构飞行控制也可用QFT方法进行分析与设计;在讨论QFT原理与应用的基础上,以某飞行器的飞行控制设计为例,对鲁棒和重构飞行控制进行了分析、研究与设计,获得了满意的设计结果。

Abstract:

Quantitative feedback theory (QFT) is a frequency domain robust control technology. Considering the uncertain range of object and the performance of the system, QFT analyze and design in a quantitative way with the Nichols chart , which ensure the result is robust. In control of reconfigurable aircraft, the actuator failure can be viewed as the robustness problem,which can be solved with QFT . Based on the control of reconfigurable aircraft, this paper discusses the principle of QFT, with that the application concluded a satisfactory proposal.