关键词: 导流叶片;切换特性;数字电子控制器;液压机械备份控制器

Abstract: To improve flight reliability,hydraulic backup control system of the digital electronic control system is adopted in aeroengine compressor air-intake guide vanes control.When a digital electronic control system fault appears during working process,it requires a digital electronic control system to switch to hydraulic backup system safely,fleetly and smoothly with the performance index meeting requirement.Therefore,switching performance investigation is significant.To study switching performance,switching process dynamics and static simulation of the designed compressor air-intake guide vanes control system were presented.The simulation results show that when electronic control system malfunction appears,the switching performance index requirement can be met by cutting off elecfronic control channel.The performance index can also meet the aeroengine requirement to air-intake guide vanes control system in this mode when the system switching to hydraulic backup control.

Key words: Guide vanes;Switching performance;Digital electronic controller;Hydraulic backup controller