H_∞回路成形和定量反馈理论的直升机控制器设计

Helicopter flight control system design using H_∞ Loop Shaping and quantitative feedback theory

针对多输入／多输出（MIMO）对象提出了H∞回路成形和定量反馈理论（QFT）相结合的设计方法，并将其用于直升机全包线（飞行速度0-100kn）飞行控制器的设计。圩。回路成形方法用来实现不同控制通道的解耦，将MIMO问题转换为多个SISO（单输入／单输出）问题，从而在很大程度上简化了定量反馈的设计过程，使设计者能够更加灵活地在系统性能与控制器复杂度之间进行折衷。设计结果和仿真测试显示了良好的性能。

A design approach of H∞ Loop Shaping combined with quantitative feedback theory （QFT） is presented for a multi - input/multi - output （MIMO） plant, and is applied to the design o：f a full envelope （airspeed from 0 kn to over 100 kn） helicopter flight control system. H, Loop Shaping technique is used for decoupling of multiple control channels, transform MIMO system to a set of single - input/single - output （SISO） systems, thus can simplify greatly the design of quantitative feedback. This equivalence gives designers greater flexibility in making tradeoffs between system performance and controller complexity. Design results and simulation tests demonstrate good performance.