Research On Range Safety Control System Based On High Alphabet Technology

With the rapid development of the aerospace industry,new types of weapons with high-speed flight and long-range strike capabilities have emerged.In the process of weapon testing,if a missile or aircraft loses control,it will cause serious damage to ground buildings and facilities.Therefore,a safety control system is needed to control the self-destruction of the aircraft,ensuring that safety and testing are carried out simultaneously.The research of safety control system has become an important issue for China’s national defense modernization.The earliest safety control system used in China’s target field was based on PCM-PSK-FM system,which is easy to implement and technically mature,but it also has the problem of poor anti-interference ability and low security.In order to improve the safety and reliability of the target field safety control system,this project designs a safety control system that combines the new high alphabet system with the traditional PCM-DPSK-FM system,and analyzes and studies these two information systems.This article studies the transmitter and receiver technology of the target field safety control system.Based on previous research on safety control systems,combined with the actual project requirements and the problems faced by the current safety control system,a safety control system scheme is designed with the Soc chip and AD9361 RF chip as the core hardware platform.This article introduces the overall system scheme,and respectively introduces the four components of the target field safety control system:ground transmitter,aircraft receiver,ground control equipment,and safety control command execution equipment.The software and hardware implementation methods of the ground transmitter and aircraft receiver are described in detail.The ground transmitter uses a board with the Soc chip and AD9361 RF chip as the core hardware platform,and sends safety control commands through the serial port.The aircraft receiver uses digital receiver technology to design the hardware receiving device,which mainly includes two modules: RF front-end processing module and baseband signal processing module,and discusses the front-end frequency detection to ensure gain.This article compares and analyzes the performance of the high alphabet system and the PCM-DPSK-FM system,and performs functional simulation of the FPGA design content on simulation software Modelsim.Both modulation,demodulation,and framing of the two systems are implemented on FPGA.Finally,the closed-loop detection of the two systems is completed on the hardware platform developed by this project.Through experiments,the target field safety control system designed in this project achieved the transmission and reception of both PCM-DPSK-FM system and high alphabet system.Test results show that the probability of missed commands and false commands of the high alphabet system is significantly lower than that of the traditional PCM-DPSK-FM system,which has better reliability and certain practical value for the research of target field safety control technology for aircraft.