基于适航要求的飞机和发动机多余度信号表决设计

为保证机双发或4发在相同油门杆／操纵杆角度下的推力／功率一致，发动机控制系统可使用来自飞机的环境温度、 压力信号。适航要求当飞机信号发生错误时发动机推力变化不超过3%，因此发动机控制系统需要具备飞机信号容错能力。为满 足以上要求，以发动机传感器信号为基准，根据适航条件计算飞机各信号的加权系数，综合发动机传感器基准信号、飞机信号加权 系数及其优先级顺序，设计出飞发系统之间多余度信号加权平均综合表决算法。结果表明：利用该算法，在同时满足飞机多台发 动机推力一致性需求和适航要求的前提下，可选择出精度、可信度较高的信号，在信号选择状态发生变化时，能够保证发动机推力 平稳过渡。

Design of Aircraft - Engine Multi-Redundancy Signals Voting Based on Airworthiness Requirements

To ensure that the thrust/power of four or two aircraft engines are consistent at the same angle of throttle lever, the engine control system may use the ambient temperature and pressure signals from the aircraft. The airworthiness requirements stipulate that a fault in an aircraft signal should not cause a thrust change of greater than 3%, therefore, the engine control system should be fault tolerant in the event of an incorrect aircraft signal. To meet these requirements, by taking the engine sensor signals as the reference and calculating the weighting coefficients of the aircraft signals according to the airworthiness requirements, and considering the engine sensor reference sig? nals, aircraft signal weighting coefficients, and their priorities, a weighted average comprehensive voting algorithm for multi-redundant sig? nals between aircraft and engine systems was formulated. The results show that the algorithm can select signals with high accuracy and reli? ability on the premise of meeting the requirements of aircraft thrust consistency and airworthiness at the same time, and in the event of a change of signal selection status, smooth transition of engine thrust can be guaranteed.