Research On Measurement Error Analysis And Correction Mehtod Of Flying Target Based On Optical Equipment

In the space launch and missile weapon test range measurement tasks,optical measurement equipment is an important part of ground measurement and control system,which is responsible for the flight target image recording and external ballistic measurement tasks.Optical devices to provide accurate measurement data is an important guarantee of flying target orbit determination,but in the process of measurement,due to the factors such as environment,structure,materials,optical device would inevitably contains the error of measurement data,analyze the measurement error in the process of optical equipment,can improve the measurement precision optical devices,Therefore,the error analysis of optical equipment is of great importance.First of all,this paper introduces the measure for the target range of optical equipment composition and the function of each subsystem,including servo control subsystem,optical measurement subsystem and control subsystem,etc.,in each subsystem under the synergy,illustrates the measuring principle,optical equipment mainly from the Angle of optical devices and two aspects of space coordinate transformation.Then,the error sources of optical equipment are analyzed,and all kinds of errors are classified as systematic error,random error and outlier.Through analysis,it can be seen that random errors are generally statistical results and cannot be measured and corrected.Next,we will mainly analyze the collimation error,zero error and orientation error that can be measured and corrected in the systematic errors,and further explore the detection and correction methods of outliers.Secondly,first to introduce the system error of traditional measurement methods,including taps star method and standard method,and then through the analysis of the two traditional methods,combined with the two methods in practical use when encountered difficulties,put forward a new way of measurement system error,change the original bearing the bundled with measurement and control point,system error of manual calculation way,The new method combines the azimuth marker,UAV and GPS.Through the measurement system design,the optical equipment can automatically obtain the azimuth marker information and carry out the systematic error calculation,which speeds up the measurement speed of the optical equipment system error measurement before the implementation of the measurement task,and improves the automation degree of the equipment measurement system error.Then begins to analyze the detection and correction of abnormal values that may seriously deviate from the true value of the optical equipment during the measurement process.Through reading the literature,summarize the advantages and disadvantages of the existing methods,analyze the data characteristics of the optical equipment,and find the optical equipment The measurement data is mainly based on the azimuth angle value and the pitch angle value,and their changing trend has a certain regularity.Explore the use of gray-scale prediction algorithms to detect and correct abnormal values,and compare the gray-scale prediction method with the difference fitting method through simulation,Analyze its accuracy and reliability.Finally,because the optical device itself has no ranging capability,only angle measurement values,a single optical device cannot locate the target in space.It is necessary to use the data rendezvous method to calculate the target position.This method will introduce rendezvous errors.Firstly,genetic algorithm is used to simulate the optimal geometric station arrangement method in the determined plane space,and then the minimum distance method is used for modeling and simulation to analyze the changes in the position of the target and the station,the distance between the stations and other influencing factors and rendezvous.The relationship between the errors,summed up the law of reducing the rendezvous error when the optical equipment is deployed.