航空发动机部件性能退化容错控制

Accommodation Control for Component Performance Deterioration of Aeroengine

关键词:  航空发动机  性能退化  容错控制  鲁棒控制  滑模控制  硬件在环仿真

Key words:  Aircraft engine  Performance deterioration  Fault tolerant control  Robust control  Sliding mode control  Hardware-in-the-loop simulation

摘要:

针对航空发动机部件性能退化问题，开展退化容错控制研究。视退化为干扰，综合考虑退化的缓变特性及系统的目标跟踪要求，提出一种基于H_∞鲁棒控制的部件性能退化被动容错控制设计。将退化信息加入控制律设计中，并考虑信息的不准确性，提出一种基于滑模控制器的部件性能退化主动容错控制设计。对所提设计开展硬件在环试验验证，结果表明，两类设计可以较好地弥补退化引起的发动机参数变化，并具有一定的工程应用能力，其中，基于H_∞鲁棒控制的容错设计保守性大，且具有较长的调节时间，而基于滑模控制器的容错设计具有更好的动态特性，但在应用过程中需重新配置控制参数。

Abstract:

The fault tolerant control （FTC） schemes addressing the component performance deterioration problem of an aeroengine are investigated. Firstly， the deteriorations are treated as disturbances. Taking the low-frequency property of deteriorations and the tracking requirement for the control system into consideration， a robust H_∞ control-based accommodation design is proposed from the passive FTC view. Secondly， the estimated degradation information is adopted in the control law design. Giving full consideration to the inaccuracy of the estimated information， a sliding mode control （SMC）-based accommodation design is proposed from the active FTC perspective. Finally， the accommodation designs are verified in the hardware-in-the-loop simulation. Results show that the two designs are able to recover the variations of engine parameters brought about by deteriorations and can be successfully applied in the engineering field. The H_∞ control-based design is a conservative scheme and produces longer settling time. The adaptive SMC design exhibits better dynamic characteristics. However， it is required to re-configurate the control parameters in the application process.