| Attitude sensors developed based on MEMS technology are widely used in military,surveying and mapping,aerospace and other fields,providing high-precision attitude inertial navigation data for different fields.Under different working temperatures,the stability of the detection data of the attitude sensor and the strength of anti-interference ability are important indicators.,the attitude sensor needs to be rigorously tested and calibrated before it is actually put into use.Temperature compensation is an important item in the test and calibration of the attitude sensor.This article mainly aims at the laboratory's self-developed XGZT-? attitude sensor to design and implement a high-precision and high-stability temperature compensation control system.The system takes the temperature control module in the temperature compensation of the attitude sensor as the main research object,combined with the principles of Heat spreading and Blackbody radiation,to analyze the physical characteristics of the controlled object.And based on a large amount of experimental data,use the "Step response curve" to obtain the control mathematical model of the system.First of all,the heating system is controlled by the quartz lamp heating method,and the heating control process of the heated carrier during the heating process of the quartz lamp has the characteristic of large hysteresis.which is mainly manifested in the large delay response of the heated carrier during the temperature rise,and the overshoot in the temperature control It is not ideal.Therefore,in order to improve the response time of the controlled system,an improved PID control algorithm is studied for the transformation of temperature control,so as to ensure the stability and rapidity of the temperature control system.Secondly the algorithm simulation of the large delay control system,this paper combines hardware,software and system mechanical structure to research and design the attitude sensor temperature compensation control system.Make it reach the performance index required by the compensation control system.The overall system design scheme,system working principle and compensation principle are demonstrated.At the same time,the heating device control system is analyzed by intermediate differential control,Dahlin control,and Smith control,and the advantages and disadvantages of different controls are compared.The temperature control system with Dahlin control algorithm as the optimal control model is obtained.At last accurately analyzes and models the attitude sensor data collected by the system,and studies the sensor temperature compensation algorithm.Using Pauta criterion,Least square estimation and other algorithms to calibrate and compensate the attitude sensor,the accuracy of the sensor can reach military use.standard.According to the research purpose of this article,this article elaborates the feasibility research process of the realization scheme of the sensor temperature compensation control system in detail.A large number of experiments show that the error range of the attitude sensor after temperature compensation of this system is less than ±0.2mil,which meets the national military standard of attitude sensor.At the same time,it proves that the attitude sensor temperature compensation control system studied in this paper can effectively compensate the detection accuracy of this series of attitude sensors and improve the test efficiency of attitude sensors. |
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