Title :
Evaluation of the dynamic properties of a Voice Coil Motor (VCM)
Author :
Fujii, Yusaku ; Hashimoto, Seiji
Abstract :
The electrical and mechanical characteristics of a voice coil linear motor under moving conditions are evaluated using a method based on the levitation mass method (LMM). The force generated by the actuator is measured as the inertial force of the mass, which is levitated with sufficiently small friction using a pneumatic linear bearing. The moving mass of the bearing is connected to the moving part of the actuator. During the measurement, only the Doppler shift frequency of the laser beam reflected by the mass is accurately measured using an optical interferometer. Then, the velocity, the position, the acceleration and the inertial force of the mass are calculated from the frequency. Simultaneously, the current and the voltage supplied to the actuator are measured.
Keywords :
Doppler shift; actuators; linear motors; machine bearings; Doppler shift frequency; actuator; dynamic properties; electrical characteristics; inertial force; levitation mass method; linear motor; mechanical characteristics; optical interferometer; pneumatic linear bearing; voice coil motor; Coils; Doppler shift; Force measurement; Frequency measurement; Friction; Hydraulic actuators; Laser beams; Levitation; Optical interferometry; Pneumatic actuators; Levitation Mass Method; air bearing; air slide; inertial force; inertial mass; optical interferometer;
Conference_Titel :
Mechatronics and Machine Vision in Practice, 2007. M2VIP 2007. 14th International Conference on
Conference_Location :
Xiamen
Print_ISBN :
978-1-4244-1358-4
Electronic_ISBN :
978-1-4244-1358-4
DOI :
10.1109/MMVIP.2007.4430715
