Overview of Position Servo Control Technology and Development of Voice Coil Motor

Voice coil motor (VCM) is a special direct drive linear motor, which can convert electric energy directly into mechanical without the use of transmission mechanism. VCM has advantages simple structure, good rigidity, fast response, silence, high linearity, no cogging force, pulsation et al. It widely used in field high-precision control. This paper reviews and summarizes results research conducted by scholars from various countries, general situation servo control technology. Firstly, basic description VCM's mathematical model common mechanisms provided. The benefits, drawbacks, application techniques are all explored detail; At same time, methods to improve strategy proposed; Then, combined with analysis countries on VCM, problems difficult establish accurate model, friction disturbance vibration solutions corresponding summarized; Finally, summary fields