Pneumatic type support system of primary mirror of astronomical telescope

Abstract

The invention discloses a pneumatic type support system of a primary mirror of an astronomical telescope. The system comprises a pneumatic type force actuator system as a key member, wherein a force output end of the force actuator is linked with a mirror plane through a force sensor; the system is characterized in that the force actuator precisely outputs force by adopting a pneumatic theory. Gas pressures of the two ends of a piston in a cylinder are controlled by a control system through an electricity-air ratio valve according to a signal of the force fed back to the control system of the force sensor. The system comprises an ultralow friction cylinder, a high-precision electricity-air ratio valve and a force sensor closed loop; the size of the force output by the actuator is controlled precisely; the response frequency is up to 1HZ; and meanwhile a desired stroke range of the force sensor can be set; a larger force range can be achieved by setting up a pressure range of the air; and furthermore, the system can be used in an extremely severe environment such as the South Pole, and has low requirements on the environment.

Description

technical field [0001] The invention relates to a support system for a main mirror of a telescope, in particular to a set of aerodynamic active support system for a main mirror of an astronomical telescope. It is mainly used in the active optical mirror support technology of astronomical telescopes. Axial support for thin mirrors or lightweight mirrors and active optical correction or position adjustment of the mirror surface. Background technique [0002] Active optics technology is mainly to correct the mirror surface shape errors caused by the manufacture, installation, gravity field, and temperature gradient of the telescope mirror. In the past two decades, active optics technology has been widely used in ground-based telescopes. The active optical support system is one of the key technologies in the design of large aperture telescopes. As the most important component in the design of the active optical mirror support system, the force actuator has always been one of ...

AI Technical Summary

Problems solved by technology

[0003] For the active support system of the main mirror of the telescope in the prior art, in order to avoid the complicated mechanical structure due to the use of the electromechanical force actuator, and improve the response frequency of the actuator output force, overcome the high energy consumption of the piezoelectric active support, Disadvantages such as high cost and low travel

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