Closed-loop control-based micro-Newton order micro-thrust dynamic test table and test method

Abstract

The invention discloses a closed-loop control-based micro-Newton order micro-thrust dynamic test table and test method. The micro-thrust dynamic test table comprises a swinging arm, a calibration coil, a calibration magnet, a calibration controller, a displacement sensor, a displacement sensor clamping piece, a PID closed-loop control module, a displacement meter controller, a damping mechanism, adriving force coil, a flexible shaft mechanism and a base, wherein the swinging arm is arranged on the base by the flexible shaft mechanism, the calibration coil is wound around an outer side of thecalibration magnet and is connected with the calibration controller, the driving force coil, the displacement meter controller and the calibration magnet are sequentially arranged on the swinging arm,the driving force coil, the displacement meter controller and the displacement sensor are connected with the PID closed-loop control module, the damping mechanism and one end, near to the driving force coil, of the swinging arm are arranged at intervals, and a to-be-measured thrust device installation station is arranged at the other end of the swinging arm. By the micro-thrust dynamic test table, the inherent frequency of the micro-thrust dynamic test table can be effectively improved, and the micro-thrust dynamic test of micro-Newton order is achieved.

Description

technical field [0001] The invention belongs to the technical field of physical mechanics, and in particular relates to a dynamic test bench and a test method for micro-thrust in the micro-North level. Background technique [0002] With the development of micro-nano satellites and non-drag satellite technology for gravitational field and gravitational wave detection, the satellites are required to be equipped with high-precision micro-propulsion systems. At this stage, the micro thruster technology being developed at home and abroad mainly includes: MEMS micro thruster array, electrospray thruster, micro-new level air-conditioning thruster, etc., the thrust size is from micro-newton to millinewton level. When the thruster is working, its thrust rise time scale is basically on the order of tens of milliseconds to hundreds of milliseconds. Obtaining the characteristics of its dynamic thrust plays an important role in the optimization design and working mechanism understanding ...

AI Technical Summary

Problems solved by technology

Although the thrust test based on the piezoelectric sensor can realize the thrust test with high frequency response, the thrust test size is above the level of hundreds of newtons, and the thrust dynamic test of the micronewton level cannot be realized.

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