Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)
- 2002.10a
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- Pages.530-535
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- 2002
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- 2005-8446(pISSN)
Intelligent control of pneumatic actuator using MPWM
MPWM을 이용한 공압 실린더의 지능제어
Abstract
Pneumatic control system has been applied to build many industrial automation systems. But most of them are sequence control type because of their low costs, safety, reliability, etc. Pneumatic servo system is rarely applied to real industrial fields because accurate position control is very difficult due to its nonlinearity and compressibility of air. In pneumatic servo control system, a pneumatic servo valve can be applied, But it is very expensive and has no advantage of low cost compared with a common pneumatic system. This paper is concerned with the accurate position control of a rodless pneumatic cylinder using on/off solenoid valve. A novel Intelligent Modified Pulse Width Modulation(MPWM) is newly proposed. The control performance of this pneumatic cylinder depends on the external loads. To overcome this problem, switching of control parameter using artificial neural network is newly proposed, which estimates external loads on rodless pneumatic cylinder using this training neural network. As an underlying controller, a state feedback controller using position, velocity and acceleration is applied in the switching control the system. The effectiveness of the proposed control algorithms are demonstrated through experiments nth various loads.
Keywords
- MPWM(Modified Pulse Width Modulation);
- Pneumatic servo system;
- on/off solenoid valve;
- load estimation;
- Intelligent control;
- Artificial neural network
- 공압서보시스템;
- 개폐식 솔레노이드 밸브;
- 부하추정;
- 지능제어;
- 인공신경회로망;