Displacement actuator system applied to spliced mirror telescope

Abstract

The invention provides a displacement actuator system applied to a spliced mirror telescope. The system comprises a voice coil motor, a displacement detection device, an active unloading device and anelectrical control unit. The voice coil motor is fixed on a fixed base in the middle of the active unloading device, the voice coil motor and the active unloading device are coaxially distributed, asliding rod attached with an electrified coil in the voice coil motor is fixed to an aluminum movable seat of the active unloading device, the displacement detection device is used for detecting a position signal and feeding back the position signal to the electrical control unit, and the electrical control unit is responsible for driving the voice coil motor and the active unloading device. Displacement control of nanoscale precision and higher output load capacity can be achieved, and the stability and wind disturbance resistance of the system are higher. The system is more compact in structure and suitable for being used under the extreme condition of a narrow space; the magnetic field in the electrified coil is stronger and more uniform, and the control precision of the voice coil motor is higher; and the control method is simple, and the control precision is higher.

Description

technical field [0001] The invention relates to the technical field of active optics, in particular to a displacement actuator system applied to spliced ​​mirror telescopes. Background technique [0002] The astronomical telescope is the main equipment for astronomical observation. Enlarging the aperture of the telescope can improve the light-gathering and resolving power of the telescope. However, it is difficult to directly manufacture a single large-aperture mirror, and with the increase of the primary mirror's aperture, the overall deformation of the mirror surface caused by gravity will also increase, seriously affecting the performance of the telescope. Splicing mirror technology is a kind of active optical technology, which uses multiple small-caliber sub-mirrors to splice into a large-caliber primary mirror, and each sub-mirror is supported and adjusted by a micro-displacement actuator. At present, there is no professional manufacturer of micro-displacement actuator...

AI Technical Summary

Problems solved by technology

At present, there is no professional manufacturer of micro-displacement actuators for astronomy in China, and related foreign products also have disadvantages such as small effective displacement, small output load capacity, micron-level harmful return clearance, slow running speed, and high price. , so researching a displacement actuator capable of high horsepower, large stroke, and high precision has become an urgent problem to be solved at present.

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