Research On Aerial Information Receiving Technology Of Aircraft Safety Control System

With the rapid development of military technology,many moderm military weapons have undergone many stages of improvement and development,and are becoming more devastating and having a longer range.Security issues,however,stand out along with the improvement of weapon performance.The safety control system is very important for aircraft.During the launch,if the aircraft malfunction happens and deviates from the predetermined safety route,the safety control system will initiate and implement the control function.Therefore,the research on the air information receiving technology of the aircraft security control system is particularly important.The PCM-PSK-FM modulation system has always been adopted in China's security control system.Although it is a very mature technology,it also exposes some shortcomings in performance.In order to improve the safety and reliability of the modern weapon safety remote control system,this paper designed the hardware platform for the air information reception of the security control system and analyzed and studied on the new modulation system,the high alphabet system.The subject achieves the modulation of the new high alphabet system through Matlab simulation,and compares the performance simulation results with the traditional modulation PCM-PSK-FM system.Fast and effective demodulation of main letter signal is accomplished by FFT method.Also the self-loop detection of the high alphabet modulation system is completed in the hardxware platform of the experiment.The aircraft security control system hardware by the subj ect is mainly divided into tparts:the security control receiving device and the security control execution device.Hardware platform of the system adopted modular design,the main modules of the security control receiving device are divided into a radio frequency receiving module,a radio frequency down conversion module,a baseband signal processing module for receiving and demodulating the security control command and a power module;the security control execution device is composed of a relay module,The purpose is to realize the security control logic and detonation function by judging the demodulated security control information through relay-controlled mode.The experimental results show that the high alphabet system has good security and stability.Compared with the traditional PSK security remote control system,the leakage command rate of high alphabet systemis has significantly lower,and the virtual command probability is even tens of orders of magnitude lower than it.From the demodulation point of view,the high alphabet system only needs simple instructions,short time to have high reliability.Therefore,the aircraft security control receiving device with the main letter as the modulation system can be widely applied in the current military field.Therefore,the high alphabet modulation system of aircraft security control and receiving equipment can be widely used in the current military field.