电传飞行控制系统信号补偿技术

Fly-by-wire Flight Control System Signal Compensation Technique[JZ)][HS)]

摘要:

信号的采集精度对控制系统的控制精度有着至关重要的影响,对电传飞行控制系统常用传感器的原理特性进行了分析,并根据其工作原理展开讨论了影响传感器测量误差的非传感器自身精度的使用问题,即:激励电源不稳定以及机械安装所形成的测量误差;针对电源精度不高所引起的信号波动对采集精度的影响的问题,提出了输入波动导致的输出波动的因果补偿方法；针对机械零位调节难度大且导致的设计复杂问题,在基于矛盾分离的方法的基础上,提出了电气调零的策略;试验、应用及分析表明,所提出了信号补偿方法能够较容易的提高电传飞行控制系统指令及反馈信号的采集精度,从而能够实现系统在整个控制范围内的高精度控制,降低了系统对机械零位调整以及对高精度激励电源设计的需求,从而简化了系统的部件设计。

Abstract:

Signal acquisition accuracy has a great influence on the control accuracy of the control system, the sensors characteristics of flight control system are analyzed, and the using problems of sensor like power supply instability and mechanical installation zero which influence the measurement precision were also discussed. In view of the influence of power fluctuation on the accuracy of signal acquisition accuracy problems, proposed a causal compensation method to solve the volatility of the output caused by fluctuation of input. To the difficulty of mechanical zero adjusting and thus caused the design complexity, the strategy of electrical adjusting zero is put forwarded based on the method of contradiction separation. Analysis and application shows that the proposed methods can realize signal compensation for fly-by-wire control system command and feedback signals acquisition accuracy more easily, thus can realize the control accuracy of the system in the whole control range, reduce the system demand for mechanical zero adjustment and high precision excitation power supply, thus simplifying the design of system components.