Research On Reinforcement Design Of Mitigating Single Event Effects Of Space-borne Laser Warning System

With the rapid development of laser technology,laser weapons has been widely put into use in the field of modern military war.Especially for the development of anti-satellite laser weapons,which poses a serious threat to the stable operation of spacecraft and space satellites.Therefore,all the countries are actively engaged in the study of space laser warning technology.How to protect the impact of single event effect on space electronic instruments is a key task to study the space-borne laser alarm system.In this paper,single event effects failure and reinforcement design methods of space electronic equipment were studied in depth,and the fault injection technology based on single event effects is studied.For the grating diffraction laser warning system,using high-performance FPGA and DSP devices as the core processing platform.This type of large scale integrated circuits in the space environment is vulnerable to high energy radiation effects,occurrence of single event effects led to the system operation failure,mainly includes the increase in the incidence of failure and recovery time is longer.In order to alleviate the failure of the system due to the single event effects,this paper from the hardware and software in two aspects of reinforcement design.In the software program design,the key logic module of the FPGA program and the communication module with the DSP using three-mode redundant design,and using the FPGA chip internal CRC cycle redundancy check function for error detection and correction;the key variables of the DSP data processing program are designed with three-mode redundancy,and the method of error detection and correction is added to the boot process.In the hardware circuit design,DSP watchdog circuit design and device power monitoring circuit design combined,real-time detection and repair DSP hardware circuit abnormalities,and using the power bus overcurrent protection circuit protection system power supply circuit.According to the characteristics of single event effects,establish single event failure model,using software-based fault injection technology,a single event failure injection system is designed,which realizes the effective evaluation of the fault-tolerant performance of the laser alarm system.The fault injection experiment is carried out on the grating diffraction laser warningsystem,evaluate the effectiveness of the system reinforcement design.The reliability of the software program reinforcement design is verified by single event failure injection system,the stability of hardware circuit reinforcement design is verified by heavy ion irradiation.The experimental results show that the failure rate of single event effects is less than 1.2% after reinforcement design,and after the system operation failure can resume normal operation in1 s,which effectively reduces the effect of single event effects on the spaceborne grating diffraction laser warning system.