Design and Test Research on Voice Coil Actuator Used for Active Isolation Platform

According to the actuating requirement of active isolation platform, magnetic circuit and moving coil structure of non-contact installing type of voice coil actuator was designed, and the magnetic filed of the working gap was simulated. A programmable current supply used for driving the voice coil actuator was designed and the circuit was simulated. Output force performance of the designed voice coil actuator driving by programmable current supply was tested. The test results indicate that the designed voice coil actuating system has excellent output force performance at low frequency band with good linearity and low noise and waviness. The measured output force coefficient of the voice coil actuator matches with the designed value, and the designed actuating system can meet the requirement of active isolation platform.