Research On Computer Simulation Test Technology Of Environmental Force

Fuze is a system that controls the detonation sequence of ammunition by sensing the target or by predetermined conditions(such as time,pressure,instruction,etc.).For the development of modern fuze,computer simulation of environmental information source is lacking in fuze test and primary fault test.Fuze experiment and test are very important for fuze quality assurance,so it is of great significance to develop fuze multi-environment simulation test method based on computer technology.After comprehensive analysis of fuze recoil force and centrifugal force environment characteristics at home and abroad,a computer fuze environment simulation test system consisting of information source,interface control circuit and test device is put forward.The simulation signal of maximum chamber pressure of recoil force is used as the control signal of the recoil electric switch,and the centrifugal force muzzle velocity(maximum velocity)signal is used as the control signal of the storage electric switch.By solving the recoil dynamics equation of fuze parts,the maximum bore pressure at 1.85 ms is 112.29 Mpa and the maximum velocity at muzzle is 275.721m/s.The relative error is less than 10% compared with the fuze manual value.A set of data of recoil force of fuze parts of internal ballistic is obtained by simulation.Similarly,a set of centrifugal force data of fuze parts during charging of No.3 and No.0 are obtained,and the maximum bore pressure and muzzle velocity in the same coordinate system respectively represent the maximum recoil force and maximum centrifugal force characteristic quantities.In order to match data transmission,FPGA serial port receiving module is designed.The three information of maximum bore pressure,muzzle speed and time are transformed into pulse signals,and the timing starting point of the three signals is synchronized,that is,the same time axis in the same coordinate system is realized.The FPGA serial port receiving module is discrete into three groups of data,each group of data is 32,which is scaled up into integer data and successively stored in registers.Multi-signal serial transmission between the information source and FPGA is realized.The threshold criterion was established,and the maximum bore pressure and muzzle velocity were taken as thresholds.A 7-bit index register was designed to compare the data in sequence,and the maximum value and corresponding time were transmitted to the output module.The Testbench test program is designed to verify the validity and correctness of data transmission of interface control circuit.The output module is designed.When receiving the maximum value and the corresponding time,the pin gives the test device a trigger narrow pulse with the pulse width of 1ms,realizing the output of the analog signals of maximum bore pressure and muzzle velocity in the same coordinate system.Finally,the functional testing,set for the origin of coordinates electric moment,computer output recoil force,the centrifugal force characteristic information,measured 1.88 ms maximum recoil control signal,7.06 times and ms largest centrifugal force control signal,the test results show that the can at the same time axis under order two analog signal output recoil force and centrifugal force.Aiming at the research needs of the key technology of electromechanical fuze ignition control system of armor breaking ammunition,this paper takes the logic controller of ignition control system as the application object and carries on the research of computer environment simulation test method and test system design,which has important military and practical significance.