Integrated equipment and method for thrust measurement and in-situ calibration of attitude control engine

Abstract

The invention relates to a spaceflight liquid engine test device, particularly to integrated equipment and method for thrust measurement and in-situ calibration of an attitude control engine, and aimsto solve the problems that a measuring force sensor of an existing attitude control engine bears large initial torque, fatigue cracks are prone to being generated, and influences of external factorssuch as heat radiation, vibration and the like on thrust measuring precision are large. According to the technical scheme, the integrated equipment comprises a thrust measurement device, a calibrationforce loading device, a data acquisition system and a data processing system, wherein the thrust measurement device comprises a center shaft, an elastic sheet, a connecting frame, a fixed frame, a measurement force sensor and an adapter frame, and the calibration force loading device is arranged on one side of the center shaft and comprises a calibration frame, a lead screw loading mechanism, a standard force sensor and a steel wire. The invention further provides an attitude control engine thrust measurement and in-situ calibration method.

Description

technical field [0001] The invention relates to an aerospace liquid engine test device, in particular to an integrated device and method for attitude control engine thrust measurement and in-situ calibration. Background technique [0002] Steady-state thrust measurement mostly uses a thrust wall-type measuring device. The measuring force sensor is fixed on the thrust wall. The engine is connected to the measuring force sensor through an adapter frame. The thrust force can be measured through the deformation of the strain gauge. [0003] For the 0-1000N thrust attitude control engine, the engine is directly connected to the measuring force sensor through the adapter frame, that is, the engine is connected to one end of the adapter frame through the bolt hole on the flange of the head, and the center of the measuring force sensor is an internal thread through hole. The other end of the adapter is bolted to the measuring force sensor through the central hole. The torque genera...

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Problems solved by technology

[0006] In order to achieve 0-1000N thrust, especially the high-precision measurement of the thrust of the attitude control engine in the state of the large nozzle, it solves the problem that the measuring force sensor bears a large initial torque and the elastic element of the sensor is prone to fatigue in the steady state thrust measurement of the existing attitude control engine Cracks, and external factors such as thermal radiation and vibration have a great influence on the thrust measurement accuracy. The present invention provides a thrust measurement device, method and calibration force loading device for an attitude control engine

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