Research On Simulation And Experiment Of Transfer Aligment Key Technology Of Moving Measurement System

Mobile measurement system is the main method to obtain large scale geospatial information at the present stage,and the accuracy of sensor attitude information is a problem to be solved.With the transfer alignment technology is becoming more and more mature and perfect,many military weapons are using the technology to obtain inertial navigation system for the high precision attitude information.Therefore,the study of transfer alignment technology applied in mobile measurement system has a certain theoretical significance and practical value.For the present situation of mobile measurement's rising demand for accuracy of multi-sensor attitude information,transfer alignment method research between the master and slave inertial navigation system has become the effective method of acquiring initial posture for present multi-sensor,this paper is around the matching scheme between the master and slave inertial navigation system and plans to carry out the algorithm research and simulation experiment.Deduce five kinds of matching error models and design four kinds of carrier motor ways and respectively carry out transfer alignment simulation of five match schemes;the lever-arm length estimation,filtering and the direct calculating compensation methods are presented in this paper to analyze effects on performance of transfer alignment caused by lever-arm error compensation;fixed point and fixed interval smoothing algorithm are respectively used to evaluate the alignment accuracy,and make simulation validation on the basis of theoretical analysis;after setting up the experimental platform and collecting experimental data of the three-axis turntable,make offline process.Simulation and experiment results show that the velocity matching,attitude matching,velocity and attitude matching method can achieve a relatively ideal transfer alignment performance,when there is a lever-arm effect in the master and slave inertial navigation system,give priority to the use of lever-arm length estimation method,fixed interval smoothing algorithm can effectively completed the precision evaluation.The research results can provide technical support for the implementation of the transfer alignment scheme.