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Electric Actuator with Self-locking Function for Adjusting the Main Reflector of Radio Telescope

A technology of radio telescopes and electric actuators, applied in the direction of electrical components, antennas, etc., can solve problems such as return errors, complex structures, and low efficiency, and achieve the effects of small return errors, small volume, and high efficiency

Active Publication Date: 2018-04-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing electric actuator is self-locking through the worm gear reducer, which has the disadvantages of low efficiency, relatively low return error and precision, and complex structure

Method used

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  • Electric Actuator with Self-locking Function for Adjusting the Main Reflector of Radio Telescope
  • Electric Actuator with Self-locking Function for Adjusting the Main Reflector of Radio Telescope
  • Electric Actuator with Self-locking Function for Adjusting the Main Reflector of Radio Telescope

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Embodiment Construction

[0013] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The following embodiments are based on the technical solutions of the present invention and provide detailed implementation methods and specific operating procedures, but the protection scope of the present invention is not limited to the following embodiments. .

[0014] see figure 1 , as shown in the figure, the electric actuator with self-locking function for adjusting the main reflection surface of the radio telescope includes four parts, namely the ultrasonic motor part, the planetary reducer part 2, the transmission coupling part 3 and the electric cylinder part 4; the ultrasonic motor part, the planetary reducer part 2 and the transmission coupling part 3 are arranged inside the case 5. The ultrasonic motor part is sequentially connected to the planetary reducer part 2, the transmission coupling part 3 and the electric cylinder part 4, and dr...

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Abstract

An electric actuator with self-locking function for adjusting the main reflection surface of a radio telescope, which includes an ultrasonic motor part, a planetary reducer part, a transmission coupling part and an electric cylinder part, and the ultrasonic motor part is connected to the planetary reducer part in sequence , the transmission coupling part and the electric cylinder part, and drive the electric cylinder part through the planetary reducer part and the transmission coupling part to drive the main reflecting surface of the radio telescope to make adjustment movements; when the ultrasonic motor part is powered off, its The inner stator and the rotor are in contact with each other and squeezed so that the ultrasonic motor part cannot rotate, and the power-off self-locking of the ultrasonic motor part is realized through the combined action of the ultrasonic motor part and the planetary reducer part. The whole system of the present invention is compact in structure, has the characteristics of high precision, high efficiency, small volume, heavy bearing, small return error, self-locking when power off, and wide temperature range, and is suitable for the main body of large radio telescopes with high precision and wide temperature range. Reflective surface active control system.

Description

technical field [0001] The invention relates to an electric actuator, in particular to an electric actuator with a self-locking function used for active adjustment of the main reflection surface of a large radio telescope, and belongs to the technical field of precision machinery. Background technique [0002] The surface shape error of the main reflector of a large radio telescope is an important factor affecting the observation efficiency. For high-frequency signals, the observation efficiency of the main reflector with a large surface error is attenuated by as much as 5 times. In order to overcome the surface deformation of the main reflector of large radio telescopes due to its own weight, wind load and temperature changes, it is usually necessary to compensate the deformation of the main reflector to make it more consistent with the standard parabola. For this purpose, the main reflective surface is divided into several sub-panels, and the electric actuator drives each ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/16
Inventor 叶骞戚举鹏朱迪
Owner SHANGHAI JIAO TONG UNIV
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