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高速开关阀是电液控制系统的新型元件,与计算机接口方便,并有较强抗污能力.设计了一个基于高速开关阀的二次调节转速控制系统,建立了主要元件的数学模型,并得到转速控制系统的状态方程.通过采用脉冲宽度调制(PWM)技术,实现对该系统的转速控制.通过仿真,研究了占空比和阻尼系数对系统响应的影响.并通过试验对仿真结果进行了验证.研究表明:通过改变高速开关阀的PWM信号占空比,可以实现对二次元件的转速控制,且能满足系统的性能要求.
High-speed on-off valve is a new type of electro-hydraulic control system with convenient interface to computer and strong anti-fouling ability.A secondary speed regulation system based on high-speed on-off valve is designed and a mathematical model of the main components is established. The state equation of the speed control system, the speed control of the system is realized by adopting the pulse width modulation (PWM) technology, the influence of the duty ratio and the damping coefficient on the system response is studied, and the simulation results are tested Verification.The research shows that by changing the PWM signal duty cycle of the high-speed on-off valve, the speed control of the secondary components can be realized and the system performance requirements can be met.