三余度数字伺服控制系统建模与动静态特性研究

Modeling and analysis of static and dynamic characteristics of triplex redundance digital servo control system

对研究的三余度伺服控制系统的机理进行分析,建立了被控对象的线性化数学模型。在此基础上,对数字动压反馈环节的参数进行了仿真寻优,并对无故障和两种单点故障情况下系统的动、静态特性进行了仿真和分析。带惯性负载试验结果证实了理论建模分析的正确性,并表明数字动压反馈也能起到对负载谐振的阻尼作用,与机械式、模拟式实现形式相比,它更灵活、方便。

A linearized mathematical model for the developed triplex redundance servo control system is derived on the basis of its mechanism analysis. The coefficients of the digital dynamic pressure feedback (DPF) loop are optimized through simulation. The static and dynamic characteristics of the system without failure and with two single failure are simulated and analyzed. Experimental results with inertial load support the theoretical modeling and analysis. Compared with mechanical and analog DPF, the digital DPF is more flexible and can achieve same purpose for damping the inertial load resonance.