Study On Methods To Improve The Attitude Measurement Precision Of The Rotary Object

Three-dimensional attitude reflects the important parameters of the target in the airflight status, is widely used in military, aerospace, transportation and other fields, theaccurate measurement of test analysis, identification of the accident, the assessment oftraining, inspection and design of new models stereotypes of the flight control systemhas an important the application value. The essence of space target3D attitude solutionmethod is to use known information measurement in the image, and calculate the targetpitch angle, yaw angle and roll angle. With the development of China’s missile andspace experiments, increasing measurement accuracy requirements of the opticalmeasurement system. Commonly used optical measurement methods only as a flyingtarget the particle target to deal with has been inadequate，received only target trajectory,velocity and acceleration can not meet the demand at this stage, therefore must alsomeasure the three-dimensional attitude of the target during the flight.This paper mainly research on the method of improving the precision of rotarytarget, based on the research and development trends of domestic and foreign research,mainly from the rotary target attitude, attitude of the mathematical description ofmathematical model and attitude data processing are studied.First use of dual quaternion attitude information to describe the target, it isportrayed to the general rigid body motion is the most effective and most concisemathematical theory, only need to transform, you can describe the rotational andtranslational motion of the object, to avoid data relationship between isolation alsomakes a concise mathematical expressions. Then do the further research on the currentcalculation method of attitude common angle model, to perfect and improve it, and gota new attitude angle measurement mathematical model and reduced the algorithm ofimage quality, improved its practicability, and also fully played a spiral method forsolving the advantage of the roll angle. Finally，using the Kalman filter algorithm ontarget position and attitude angular filters separately, in order to reduce the influence ofdata error; When the target is occluded, by the filtered data using the transfer vectormethod spherical interpolation method for processing, to eliminate asynchronousaffecting the realization of the synchronization processing.The article also experimental results compared with the theoretical analysis to verify the theoretical analysis results has a good role in guiding future work.