Title :
Optimum predictive and feedforward control of a precision linear stage using genetic algorithm
Author :
Low, Kay-Soon ; Keck, Meng-Teck
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
In the area of factory automation, vision based leads inspection systems are increasingly used to ensure that the lead forms of the integrated circuits meet the PCB assembly requirements. Typically, it comprises a camera system and a precision linear stage. In this paper, the development of a motion control system used in the authors´ prototype leads inspection system is presented. High performance is obtained by using a permanent magnet DC linear motor as the actuator for the linear stage, which eliminates the needs of mechanical transmission from the rotary to linear motion. Fast and accurate servo response is achieved by using a state space predictive controller with feedforward compensation of friction. The controller is optimally tuned using the genetic algorithm. The experimental system has a positioning accuracy of 1 μm and a peak speed of more than 1 m/s. Some experimental results are presented
Keywords :
DC motors; control system synthesis; electric actuators; factory automation; feedforward; linear motors; machine control; machine testing; machine theory; motion control; optimal control; permanent magnet motors; predictive control; PCB assembly requirements; factory automation; feedforward friction compensation; genetic algorithm; integrated circuits; motion control system; optimum predictive feedforward control; permanent magnet DC linear motor actuator; precision linear stage; state space predictive controller; vision based leads inspection systems; Assembly systems; Automatic control; Cameras; DC motors; Inspection; Manufacturing automation; Motion control; Motion planning; Permanent magnet motors; Prototypes;
Conference_Titel :
Industrial Electronics Society, 1999. IECON '99 Proceedings. The 25th Annual Conference of the IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-5735-3
DOI :
10.1109/IECON.1999.819397