Research On The Measurement Of Dual Source Thrust Vector

With the development of industrial society, sensing and control technology is widely used in the aerospace, medical equipment, mining, precision manufacturing, and other industries. Force measurement is a very important part of the sensing and control technology. Traditional force measurement is to test the magnitude of force. In modern industry, with the improvement of production accuracy, the measurement of force has higher requirements, and vector force test is the trend of the force measurement. Compared to developed countries, there is a big technology gap in this regard in our country. Developing a high precision, good reliability measure dynamometer is significant for both scientific research and industrial production.This article relying on the development of rocket two parallel thrust vector test dynamometer is to analyze and research the tests for dual source vector force. The subject is characterized by large span of dual source loading point and small angles of the vector force. According to domestic and international aspects of the vector force tests, combined with the excellent piezoelectric characteristics of piezoelectric quartz, piezoelectric quartz is used as force sensitive component, and the dual source vector force dynamometer is designed.Firstly, according to test and technical requirements, the overall test system scheme is designed, and the test systems theory, signal conversion process, the hardware in testing process is clearly pointed out. The vector force loading device is simplified to establish mechanical model. The three components of the vector force is clearly pointed out, and the decoupling force component formula is obtained, in order to provide the theoretical basis for the test system development. Secondly, the structure and space arrangement of sensors and core components of the dual source vector force test equipment is researched. Based on the design experience, several initial preferred schemes are determined. According to stiffness, natural frequency, decoupling difficulty, production difficulty and cost, a comprehensive comparison of options is conducted to determine the best scheme based on the test need and structural features. Then, according to the magnitude and direction of three-axis force, calibration and load scheme is designed. The three-axis orthogonal calibration form is determined, with the main force calibration by tensile and lateral force calibration by pressure. According to the normal structure of calibration device, hydraulic loading is adopted to calibrate, and the three-axis calibration device and self-centering structure is designed, which meets force source simulation loading experiment needs. The experiment and testing scheme is designed for three-axis static calibration experiment, and the linear, repeatability, and interference of each direction is analyzed. The normalization coefficient and interference compensation coefficient is calculated. Finally, the simulation load scheme is designed for the eight-station to simulate the test, and the data is analyzed for normalization and disturbance compensation. The fitting circles, the circle centers and radius are drawn to fit the data of each gradient loading experiment to analyze error sources. Single source and dual source loading simulation experiments is conducted, to compare the calculation parameters of the two sources force and the calculation parameters of eight-station.According to the experimental data process and analysis, various indicators for measure are obtained. Compensation processing and optimization design are conducted for the reasons of errors. According to the test results, the test accuracy and the performance indicators of the device can meet test needs, and it can be used in dual source thrust vector test.