FPGA-based High-Precision Position Control IC

• Main Authors: Tsun Wang, 王淳
• Other Authors: Pi-Cheng Tung
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/35577337247618155164

碩士 === 國立中央大學 === 機械工程研究所 === 91 === The demand of high precision and high accuracy becomes more and more important in modern mechanical systems, such as machine tools and microelectronics manufacturing equipment. The objective of this thesis is to present a high-precision position control IC based on Field Programmable Gate Array (FPGA) for the computerized numeric control (CNC) machine tool. The most important factor that affects the high-precision position control is friction. Friction is a complex physical phenomenon and the linear control theory cannot be used to compensate it. In order to achieve high-precision position control, friction must be appropriately compensated for. The thesis presents an auto-tuning parameter of friction compensation based on the adaptive control. The position loop controller is PD controller and feedforward controller ensuring robust and promote the tracking performance. The proposed position control IC consists of a motor control circuit, a RS-232 interface circuit, quadrature decoders and up/down counters, and a serial D/A interface. The experimental verification was carried out with the XYZ table of the Pou Yuen machine tool with Panasonic AC servomotors.