Research On The Test System Of Multi-Trigger Muzzle Shock Wave Based On FLASH

This paper extensively reviewed the literature related to the theory of muzzle shock wave and the conventional test methods,combined with the actual test requirements,the paper identified three problems in the current muzzle shock wave test,that is,the problem of universality of the test system,the continuous test problem,and the remote operation problem.On this basis,the time-domain and frequency-domain characteristics of the conventional muzzle shock wave were analyzed,and the system design indexes were defined combining with the requirements of relevant military standards.To improve the universality of the system,the paper designed a multi-parameter programmable technology to ensure that the system can meet the test requirements of different occasions.Aiming at the demand of continuous artillery firing test,a multi-trigger strategy was designed,which enabled the system to record the muzzle shock wave data for many times continuously,and then read the data back for analysis at the end of the test.Aiming at the problem that it is difficult to monitor the working state of the system in the test site remotely,the wireless communication technology was designed to ensure that the system of each measuring point works normally and stably during the test.On this basis,the problem of slow data write rate in negative delay data storage stage was solved by double plane operation,and the sampling rate of the system was increased to 2 MSPS.In addition,this paper solved the problem of discontinuous storage logical address caused by invalid block in system memory by replacing bad block with good block.Finally,to solve the problem that the negative delay data is easy to be confused with the positive data when it is read,a writing and reading scheme of the negative delay data was designed,and the negative delay length was programmable.The designed system debugged the power management module,signal conditioning module,sampling and storage module and communication module in the laboratory,perfected and verified the functions of each module,finally,the paper verified the feasibility and reliability of the system through a live ammunition test.The test results show that the system can stably store the muzzle shock wave data formany times and accurately record the trigger time,providing stable and reliable test data for continuous shooting of cannon.