分段重构控制策略

现有控制重构方案均需要精确的故障定位,存在着诊断过程中系统耐故障能力不足的缺陷.文中提出一种分段重构的重构策略以解决该问题.只要故障被定位至某些适当的元件集合,控制重构就开始进行,并随诊断过程的深入分段推进.该策略被转化为一个鲁棒模型跟踪问题,并提出一种基于H2/H∞混合性能指标优化的控制律设计方法实现.针对某飞行器具体设计了可重构飞控系统,结果表明该方法具有很好的重构效果.

A MULTISTAGE CONTROL RECONFIGURATION STRATEGY

In current control reconfiguration schemes, the reconfiguring processdoes not occur until faults are located accurately. This may cause the fault toleranceproblem during the diagnosis process. We propose a multistage strategy in whichthe reconfiguring process starts once the faults are located in some suitable elementsets, and carries forward through other stages along with the diagnosis processadvancing. The strategy is transformed into a robust model-following problem, anda mixed H2/H∞ method is provided for that problem. The above strategy and designmethod were applied to some advanced aircraft, and the results showed theireffectiveness.