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Current position£ºHome > News The voice coil motor drives a quick mirror

The voice coil motor drives a quick mirror

time£º2017-8-29  click£º1799

¡¡¡¡Fast Steering Mirror (Fast Steering Mirror) is a device that uses a mirror to precisely control the direction of the beam. Used to align and stabilize the beam. It is widely used in astronomical telescope, laser communication, image stabilization system, adaptive system, tracking aiming and laser emitting optical system. In recent years both at home and abroad are constantly developing and developing such devices.

¡¡¡¡The quick mirror structure consists essentially of a support base, an inner frame, an outer frame, a mirror, a drive element, a motion transmission element, and an angle measuring element.

¡¡¡¡Fast mirror common drive components are piezoelectric ceramic and voice coil motor. ¡¡¡¡¡¡Piezoelectric ceramic resonant frequency is higher, but the required drive voltage is high, high cost, can drive the stroke is small, and with the increase in stroke, the cumulative error also increased. The life of the voice coil motor is 2 orders of magnitude higher than that of the piezoelectric ceramic. The speed performance is good, the starting torque is large, the driving voltage is small, the adaptability to the environment is strong, the shortcoming is the low response frequency, the control system bandwidth Below 100 Hz.

¡¡¡¡The traditional two-shaft fast mirror is used to control the rotation of the mirror by driving the rotating shaft. The driving method needs to overcome the large moment of inertia and friction torque, and the error of the measurement of the corner angle of the mirror is also large. Therefore, the use of linear voice coil motor drive the edge of the frame to drive the direct drive. The telescopic rod of the voice coil motor is connected to the frame by means of a flexible hinge. The movement of the motor is straight and the movement of the frame is rotated. In order to avoid interference, the flexibility of the flexible hinge is increased in the direction of the mirror work, that is, an increase of one degree of freedom.

¡¡¡¡The angle of rotation of the inner and outer frames of the fast mirror is measured by the grating micrometer developed by the self-developed, which has the advantages of high measurement precision, high response frequency, strong anti-interference ability and small volume. The measurement resolution is better than 0.06 ¦Ìm , The corresponding angular resolution of up to 0.1. "In the FSM system, two grating micrometer and two linear voice coil motor relative to the axis of symmetrical distribution, through the flexible hinge directly connected to the inner and outer frame, the angle changes The distance from the measuring head to the measuring head does not increase the friction torque, which effectively reduces the measurement error and greatly improves the control precision and reliability of the system.

¡¡¡¡Kunshan Tongmao Electronics Co., Ltd. is a professional manufacturer and manufacturer of high-performance, high-quality linear and swing motion solutions. The main products are linear motor, voice coil motor and system integration. The company has always maintained the idea of innovation, quality and service. , And strive for customers to create the highest cost-effective products. Please pay attention to a lot of attention with Tongmao straight voice coil motor.