The Control and Monitoring Systems of the Planar Linear Motor
碩士 === 國立交通大學 === 電機與控制工程系 === 89 === Traditionally﹐the planar linear motor operates in an open-loop control structure. When the forcer stalls or loses its step command﹐the motion system presents totally inaccurate performance since there is no position feedback. The usage and development...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2001
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| Online Access: | http://ndltd.ncl.edu.tw/handle/56639820920838975044 |
| Summary: | 碩士 === 國立交通大學 === 電機與控制工程系 === 89 === Traditionally﹐the planar linear motor operates in an open-loop control structure. When the forcer stalls or loses its step command﹐the motion system presents totally inaccurate performance since there is no position feedback. The usage and development of the planar linear motor are thus limited. Such defect can be improved by applying proper position sensors and control.
In this study﹐ultrasonic sensors which are controlled by 8051 microcontrollers are set up on the forcer of planar linear motor. The distance between the forcer and the edge of the planar can be then measured and transformed to PC through RS-232.By applying signal process techniques of median filter﹐rectangular window﹐and Kalman filter﹐precision of measurements will be significantly improved and the location of the forcer on the planar could be thus exactly settled.8051 microcontrollers are applied to generate pulse commands to the motor. As the planar linear motor loses its step command﹐the present ultrasonic sensors provide X and Y positions to the control system and necessary modification of command to achieve accurate motion can be thus taken.
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