Key Technologies Of Dual-band Spatial Compound Hardware-in-loop Simulation Test Of The Detection System

High frame rate detection systems have been increasingly widely used in aerospace exploration,in order to complete its functionality and performance testing and verification,corresponding high frame rate scene simulation systems are needed to carry out the relevant semi-physical simulation test.At the same time,the demand for simulating the dual-band and multiband characteristics of high dynamic objects is growing with the development and changes of the application environment of detection technology.This thesis focused on the study of visible and short-wave infrared dual-band spatial compound scene simulation technology and the function simulation technology of detection systems,carried out researches on key technologies of digital scene modeling,physical scene displaying and function simulation under the application background of detection systems,designed the technical scheme of integrating the scene simulator and the detection system together,builded the semi-physical simulation test and verification platform,and completed the comprehensive testing of the whole system.According to the need of high dynamic object simulation and detection in dual-band,the main research contents of this thesis include as follows:1.Under the application background of moving space debris detection,this thesis analyzed the radiation characteristics of the space debris and its background,established mathematical models,developed a method of calculating the radiation quantity,and gave the way to generate digital simulation scene data using OpenGL.2.Based on the study of the hardware characteristics and driver method of DMD,this thesis analyzed the limitation of commonly used gray scale modulation methods and proposed a new modulation method for driving DMD to display high dynamic images with ultrahigh frame rate.It greatly improved the frame rate of scene simulation system and maked the system have the ability to simulate the characteristics of the high dynamic target and background.3.Combined with the projection imaging features of DMD,a method using for compound accuracy determination and correction of dual-band simulation scenes was proposed.In this method,the DMD displays several specific pattern images,then a wide spectrum camera collects the corresponding images on the projection screen,by analyzing these images,a mapping table between the DMD mirrors and the position of corresponding pixels on the screen can be created.Based on the mapping table,the compound accuracy can be determined and the deviation can be corrected.4.By analyzing the detection environment of the moving space debris,two algorithms were designed for moving target detection according to different application environment,with full combination of characteristics of dual-band images.At the same time,this thesis researched the scanning and tracking strategy of the detection system,accomplished its function including that the detection,capture,tracking and measurement of the moving target.5.This thesis researched the integrating technologies of scene simulation and detection systems,proposed the scheme to spatial compound dual-band scenes by a transmitted projection screen,accomplished the driver design of the scene simulator,and developed the softwares of scene simulation control and detection function simulation,builded the integrated platform and verified the function and performance of the simulation system and the detection system through the integrated experiments.