Design And Implementation Of Airborne SAR Performance Diagnosis System

Airborne synthetic aperture radar has the characteristics of all-weather,all-time,multi polarization,high resolution,small size and high secrecy,which plays an increasingly important role in civil and military fields.Therefore,ensuring the performance of airborne SAR radar has become a key step in the process of using airborne SAR.At present,the diagnosis and measurement system which can guarantee the performance of airborne SAR radar has low intelligence level,weak fault location ability,and lack of mission environment simulation and intelligent fault diagnosis functions.In view of this,this paper designs and implements an airborne SAR performance diagnosis system.In addition,in order to obtain better diagnostic performance,the diagnostic system is optimized.The main contents of this paper are as follows.(1)According to the requirement analysis results,a set of airborne SAR performance diagnosis system is designed and implemented.The system is designed based on micro service architecture,and has the characteristics of high stability,high availability and strong scalability.It can provide stable and efficient diagnostic services such as echo simulation,task adaptability evaluation and task failure cause reasoning for Airborne SAR radar,and ensure the reliability,maintainability and execution efficiency of airborne SAR radar.(2)In order to solve the problem of time-consuming data transmission between echo simulator and diagnostic instrument in airborne SAR performance diagnostic system,an adaptive congestion avoidance method based on available bandwidth estimation is proposed.This method estimates the available bandwidth in the process of network transmission,and adaptively adjusts the additive factor of congestion avoidance according to the estimated available bandwidth to change the growth trend of congestion window.Simulation results show that this method has better performance and less timeconsuming than traditional congestion control algorithm.(3)The integration of airborne SAR performance diagnosis system is completed,and the corresponding function and performance test of airborne SAR performance diagnosis system are carried out.The test results show that the system has the functions of mission parameter setting,echo simulation,airborne SAR imaging display,mission adaptability evaluation,mission failure reason reasoning and multiple data visualization;Compared with the traditional congestion avoidance algorithm,the proposed adaptive congestion avoidance algorithm based on available bandwidth estimation reduces the transmission time by 6%,and improves the diagnosis efficiency of airborne SAR performance diagnosis system.