Design of voice coil force actuator in thin mirror active optical system

A contactless surface correction method for the surface deformation of a primary mirror was designed based a voice coil motor to improve the performance of a thin mirror active optical system.The working principle of the voicecoil motor was discussed,the contactless voice coil force actuator with high linearity and a small size was designed,then the performance of the force actuator was simulated and verified.After comparing the structures of traditional actuators,the overall structure of the voice coil force actuator was designed according to the requirements of application in the thin primary mirror experiment system,the physical model and mathematical model were also established and the parameters of voice coil force actuator were proposed.The experimental results show that the voice coil force actuator is a contactless linear system,and its output force is up to±0.5N.Whin this range,the linearity is less than 0.09%.