Improvement of a Pneumatic Control Valve with Self-Holding Function

14th International Conference on Fluid Control, Measurements and Visualization

Dohta, Shujiro^1 ; Akagi, Tetsuya^1 ; Kobayashi, Wataru^1 ; Shimooka, So^1 ; Masago, Yusuke^2

Department of Intelligent Mechanical Engineering, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama

700-0005, Japan^1

Product Development Division-4, SMC Corporation, 4-2-2 Kinunodai, Tsukubamirai, Ibaraki

300-2493, Japan^2

关键词: Assistive system;    Control valves;    Identified parameter;    Low energy consumption;    On/off valves;    Rubber artificial muscle;    Simulated results;    Vibration motor;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/249/1/012002/pdf
DOI  :  10.1088/1757-899X/249/1/012002

来源: IOP

【 摘 要 】

The purpose of this study is to develop a small-sized, lightweight and low-cost control valve with low energy consumption and to apply it to the assistive system. We have developed some control valves; a tiny on/off valve using a vibration motor, and an on/off valve with self-holding function. We have also proposed and tested the digital servo valve with self-holding function using permanent magnets and a small-sized servo motor. In this paper, in order to improve the valve, an analytical model of the digital servo valve is proposed. And the simulated results by using the analytical model and identified parameters were compared with the experimental results. Then, the improved digital servo valve was designed based on the calculated results and tested. As a result, we realized the digital servo valve that can control the flow rate more precisely while maintaining its volume and weight compared with the previous valve. As an application of the improved valve, a position control system of rubber artificial muscle was built and the position control was performed successfully.