带数字电子备份的发动机控制系统设计与验证

Design and verification of engine control system with digital electronic backup

在常规双余度数字电子控制系统基础上,提出了一种带数字电子备份的发动机控制系统方案。在主控系统失效时,数字电子备份系统可接替主控系统实现发动机各项功能的控制,提升了系统的任务可靠性;将备份系统内置于液压机械组件内部,提升系统的抗电子干扰和耐电磁能力。半物理和整机验证结果表明:主、备系统之间以及系统与发动机之间工作匹配良好;主备切换功能正常,切换过程参数平稳过渡,巡航状态下切换,推力扰动小于1.5%;备份系统各项控制功能正常,主控参数压比控制精度小于0.1、摆动量小于0.1,导叶控制精度小于0.15°、摆动量小于0.2°,加、减速过程燃油和导叶跟随良好,稳态、过渡态性能均满足发动机使用要求;散热设计满足器件的使用要求。

Based on the conventional dual redundancy digital electronic control system,a scheme of engine control system with digital electronic backup was proposed.When the main control system failed,the electronic backup system can take over the main control system to realize various functions of the engine,and improve the task reliability of the system.The backup system was built into the hydraulic and mechanical components to enhance the system's electronic anti-interference and electromagnetic resistance.The results of semi-physical and engine tests verification showed that the main and backup systems,as well as the system and the engine worked well;the main and backup switching functions were normal,and smooth transition of the switching process parameters was realized.When switching in cruise state,the thrust disturbance was less than 1.5%;each control function of the backup system was normal,the control accuracy of the main control parameter pressure ratio was less than 0.1,the swing was less than0.1,the control accuracy of the guide vane was less than 0.15°,and the swing was less than 0.2°,the fuel and guide vane followed well during acceleration and deceleration,and the steady-state and transient performance met the engine operating requirements;the heat dissipation design also met the operating requirements of the device.