A study on the speed control performance of a servo-pneumatic motor and the application to pneumatic tools
In this study, the performance of the rotational speed control of a proportional-valve-controlled pneumatic motor is investigated. The main application field of the proposed prototype is the pneumatic tools, which are currently very important manufacturing devices. Generally speaking, it is usually quite difficult to obtain a satisfactory and precise speed control of a servo-pneumatic motor at a low rotational speed because of the nonlinear deadband and stick-slip friction inside the proportional valve. Therefore, the fuzzy-sliding mode controller is proposed. Experiment results show that the fuzzy-sliding mode controller is superior to the traditional PID controller, especially when the command input is set at a low rotational speed. This newly designed prototype may be utilised to develop advanced pneumatic tools.
speed control pneumatic tools stick-slip proportional valve servo pneumatics precision manufacturing