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电空比例阀是新型机车制动系统中的关键部件之一,该文介绍了采用PWM原理基于高速开关阀设计的电空比例阀。为完成制动机容积室压力的精确控制,采用了模糊PID控制方法对比例阀进行控制,试验结果表明所设计的比例阀具有良好的性能,能够满足机车制动系统的要求。
The electro-pneumatic proportional valve is one of the key components in the new locomotive braking system. This paper introduces the electro-pneumatic proportional valve based on the high speed on / off valve with PWM principle. In order to achieve the precise control of the pressure in the brake chamber, a fuzzy PID control method is adopted to control the proportional valve. The test results show that the designed proportional valve has good performance and can meet the requirements of the locomotive brake system.