关键词: 气动数字阀；压力阀；压力特性；动态特性

Abstract:

The structure and principle of a new digital control valve was introduced. The valve was controlled by computer directly without D/A converter. Its spool was driven by a step motor with an eccentric gear. The way of using the continuous control method to control the step motor resolved the contradiction between the stepper motor’s quantizing error and its response speed in the traditional step digital valve effectively. Based on the established mathematic model, simulation and analyses were done to testify the dynamic properties of the valve and the pressuring characteristics of the experimental system.

Key words: pneumatic digital valve, pressure valve；pressure characteristics, dynamic characteristics