Calibration control system and method for attitude control engine vector thrust measuring device

Abstract

The invention relates to a calibration control system and method for an attitude control engine vector thrust measuring device and solves the problems that an existing vector force sensor is relatively high in uncertainty of a measurement indicating value of a sensor and repeatability is poor if field calibration correction is not performed. The control system comprises a control module, an acquisition module unit, a storage module, a data processing module and a loading mechanism; the loading mechanism comprises a transfer disk, a standard force sensor and an electric cylinder; the transfer disk is used for mounting and connecting a calibrated object, one end of the standard force sensor is connected with the transfer disk, and the other end of the standard force sensor is connected withthe electric cylinder; the control module is used for realizing control on expansion amount of the electric cylinder, the electric cylinder outputs a calibration force to the standard force sensor, and the standard force sensor transmits the calibration force to a six-component sensor by virtue of the transfer disk; and a numerical value acquired by the acquisition module unit is transmitted to the storage module to be stored, the storage module transmits the stored data to the data processing module, the data processing module comprises a decoupling module, and the decoupling module performsa decoupling operation on the data.

Description

technical field [0001] The invention relates to the field of aerospace liquid engine testing, in particular to a calibration control system and method for a vector thrust measuring device of an attitude control engine before and after a high-altitude simulation test of a 7500N attitude control engine. Background technique [0002] The traditional measurement method of thrust is to hang the engine directly on the sensor, and the sensor bears the weight of the engine, and then measure the thrust. The deformation of the strain gauge of the sensor is 1 times the thrust of the engine. The 7500N attitude control engine is the main engine of the power system of the lunar landing probe in the lunar exploration project. Its thrust ranges from 1500N to 7500N. In order to meet the requirements of space work and obtain high specific impulse performance, the nozzle of the engine adopts a large expansion ratio, but due to the limitation of machining accuracy, the geometry of the engine wi...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that if the existing vector force sensor is not calibrated and corrected on site, the measurement uncertainty of the sensor will be too large and the repeatability will be poor. Therefore, the present invention provides a vector thrust measurement for an attitude control engine Device Calibration Control System and Method

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