Dynamic Response Characteristics and Stability Analysis of Rotary Directional Valve
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摘要: 为了实现电液激振系统的高频振动，提出一种旋转式换向阀。推导了旋转换向阀的动力学方程并通过MATLAB对旋转换向阀的动态响应特性进行数值求解，分析了阻尼系数、转动惯量、液动力矩对旋转换向阀动态响应特性及稳定性的影响规律。研究结果表明：阻尼系数、转动惯量、液动力矩对旋转换向阀的响应速度、稳定性及工作带宽均有较大影响，其中液动力矩对旋转换向阀的影响程度最强，阻尼系数对旋转换向阀的影响程度最弱。研究结果可为提高旋转换向阀的动态响应特性及稳定性提供数据支撑和优化导向。Abstract: In order to realize the high frequency vibration of electro-hydraulic excitation system, a rotary directional valve is proposed and designed in this paper. The dynamic equation of the rotary directional valve is derived, and the dynamic response characteristics of the rotary directional valve are simulated by MATLAB. The effects of hydrodynamic moment, equivalent damping coefficient and moment of inertia on the dynamic response characteristics of the rotary directional valve are analyzed. The simulation results show that the damping coefficient, moment of inertia and hydrodynamic stiffness coefficient have great influence on the response speed, stability and operating bandwidth of the rotary directional valve, among which the hydrodynamic stiffness coefficient has the strongest influence on the rotary directional valve and the weakest degree of damping. The research results can provide basic data support for improving the response speed, stability and working bandwidth of the rotary directional valve and optimization orientation.
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Key words:
- rotary directional valve /
- response characteristics /
- stability /
- MATLAB /
- numerical simulation
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