Journal of the Korean Society for Precision Engineering (한국정밀공학회지)
- Volume 15 Issue 10
- /
- Pages.165-171
- /
- 1998
- /
- 1225-9071(pISSN)
- /
- 2287-8769(eISSN)
Nonlinear Sliding Mode Control of an Axial Electromagnetic Levitation System by Attractive Force
흡인력을 이용한 자기 부상계의 비선형 슬라이딩 모드 제어
Abstract
An axial electromagnetic levitation system using attractive force is a highly nonlinear system due to the nonlinearity of materials, variable air gap and flux density. To control the levitating system with large air gap, a conventional PID control based on the linear model is not satisfactory to obtain the desired performance and the position tracking control of the sinusoidal motion by simulation results. Thus, sliding mode control(SMC) based on the input-output linearization is suggested and evaluated by simulation and experimental approaches. Usefulness of the SMC to this system is conformed experimentally. If the expected variation of added mass can be included in the gain conditions and the model, the position control performance of the electromagnetic levitation system with large air gap will be improved with robustness.
Keywords
- Nonlinear control;
- Input-output, feedback linearization;
- Magnetic levitation system(MAGLEV);
- Sliding mode control;
- Attractive force
- 비선형 제어;
- 입출력 피드백 선형화;
- 자기부상장치;
- 슬리이딩 모드 제어;
- 흡인력;