Research And Implementation Of Infrared Seeker Tracking Characteristic Dynamic Equivalent Test System

This test system adopts the computer digital control technology, the optical measurement technology based on dynamic as transfer function, and fuzzy PID control technology, established a dynamic target aircraft flying imaging guidance system state capture image quality assessment parameters test platform, explores the aircraft dynamic target imaging image quality evaluation method, evaluation technology basis for study of image correction method, the conditions for infrared seeker in his flight, capture and trace the dynamic evaluation of flying targets provide innovative research platform, realizes the evaluation and analysis about the quality of the infrared optical guiding system research.First,the paper according to any signal can be represented as dc component with different frequency in the form of ac component superposition theory, the motion is decomposed into the uniform motion in a straight line with the different frequency simple harmonic motion, and based on airspace based on based on frequency domain as the analysis of the mathematical model of the transfer function, establish uniform linear motion and simple harmonic motion as the transfer function. Based on airspace based on based on frequency domain and two moving like compare the mathematical model of the transfer function and error analysis, validate the accuracy of the model, to designed on the basis of the principle of frequency domain method and the airspace method two kinds of dynamic solution as the transfer function measurement device has carried on the comparison of the selected system implementation based on airspace is dynamic as the transfer function of the principle of the design measurement device design scheme.Next, the paper based on the research of the fuzzy PID control, the design can meet the test requirements of infrared blackbody temperature control system, according to geometric optical principle, through the computer and programmable electrical units formed the move like analog device. System, the blackbody source and pinhole independent installed on the gas floating trajectory motion mechanism, driving track motion mechanism according to the imaging target movement characteristics of trajectory simulation control strategy, to make target, target motion simulation. When the blackbody source static or movement, through after being photometry system mirror group, static or dynamic can be obtained on the surface of the like as the corresponding image formed by the point spread function (PSF). On image plane measurement of image after sampling through mathematical analysis and calculation, static or dynamic photoelectric detection system can be obtained as the transfer function, on the basis of the dynamic tracing characteristics of measured infrared seeker.