Force/Position Control And Application Based On Voice Coil Motor

With the great development of semiconductor technology and electronic information technique, the radio frequency identification (RFID) technology is widely recognized and accepted by the people, and also expands new application areas and brings a broader market. The demand for low-cost RFID tags, cause the package equipment more effective and with higher reliability. This thesis mainly discusses the application of voice coil motor (VCM) in the RFID tags package equipment, and research on different control methods of VCM in different processes.Firstly, the process of the flip chip which used in RFID tags package is briefly introduced. For the technical requirements, the voice coil motor which has two degrees is chosen as the main actuator, to pick and place chips. Then the control system of this module is illuminated, and the method which uses Turbo PMAC (Programmable Multi-axis controller) to control the voice coil motor is proposed.The function of voice coil motor in the flip chip process is to complete three movements: pick, orient and place. In the first two movements, the patch head which is fixed on the shaft of voice coil motor do not need to press the chip, so the control method is mainly position control. The method how to use Turbo PMAC to realize its position control is discussed, and the model of Turbo PMAC controller is established to simulate the result. Considering the movement is repeatable, the iterative learning control method is proposed to improve its precision, and the simulated result shows it works.In the"place"process, high speed movement and low contact force are both required for the control system to ensure the high reliability. A new method which uses Turbo PMAC to realize the soft landing is proposed, and the motion track is optimized. The experiment result shows that this control method realizes the soft landing, costs shorter time and has a higher reliability.