Disc Working Medium Disc Transmissive Laser Ablation Micro Thruster

Abstract

The invention relates to a laser ablation micro thruster based on a disc-shaped working medium disk, laser transmission and the effect of a working medium, and aims to develop a prototype model of the laser ablation micro thruster of which the working medium is supplied by a laser transmission type ablation disk. A disc-shaped working medium disk, a rotating motor, a motor bracket, a sliding block, a screw rod, a translation frame, a translation motor, an optical fiber coupling semiconductor laser, a collimating mirror group, a reflector, a focusing mirror group, a laser focus, a working distance control table, a control mainboard card, a laser driving board card, a motor driving board card, an electric supplying interface, a signal interface and the like are integrated in the laser ablation micro thruster, wherein the disc-shaped working medium disk is driven by the rotating motor to provide a circumferential working medium ablation position, and is driven by the translation motor to provide a radial working medium ablation position, so that the working medium is continuously provided for the laser focus; and a laser emitted by the optical fiber coupling semiconductor laser is collimated by the collimating mirror group, the direction of the laser is changed the reflector, the laser is focused to the laser focus position by the focusing mirror group, and the laser and the working medium are interacted to generate thrust. The disc-shaped working medium disk transmission type laser ablation micro thruster disclosed by the invention fills the blank in the field of China.

Description

technical field [0001] The invention belongs to the field of space propulsion technology, and relates to space platform power system micro thruster technology, in particular to a laser ablation micro thruster based on disc-shaped working medium, laser transmission and working medium action. Background technique [0002] As an optional thruster technology in the field of micro-propulsion, laser ablation micro-thruster has occupied a place in many micro-propulsion technology fields after nearly 20 years of development. The laser ablation micro-thruster has small impulse, high specific impulse, small thrust, wide working range, low power consumption, simple and reliable, and can well adapt to the micro-thruster requirements of the micro-satellite platform propulsion system. [0003] The United States, Germany, Japan, China and other countries have successively carried out the development of laser ablation micro thrusters. The American Phipps group developed a laser plasma micr...

AI Technical Summary

Problems solved by technology

Working medium supply usually adopts flexible working medium belt. Such a flexible structure is difficult to manufacture, not easy to process, unstable in performance, and easy to delaminate. When the impact force is applied, the transparent layer is easily ablated, and its own deformation will dissipate part of the energy; the laser ablation mode usually adopts the method of obliquely incident ablation working fluid at an angle of 45 degrees, which is easy to cause the injection product to affect the optical system. pollution, and the working distance from the laser focusing optical mirror to the focal point will be affected by the reasons for avoiding pollution, so it cannot be designed small, which will increase the designed focusing spot size and diffraction limit, which will lead to excessive volume and weight of the entire optical component

In addition, problems such as the difficulty in controlling the supply of liquid working fluid, the output torque of flexible working fluid supply, and the low coupling efficiency of reflective laser and working fluid ablation energy have not been well resolved.

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