Gun Dynamic Parameters Measurement Technology on Live Firing Condition

Abstract

Recoil displacement, recoil velocity, recoil resistance and gun carriage stress were selected as the key dynamic parameters. Measurement programs were developed respectively according to the characteristics of dynamic parameters. Live firing test was carried out, and measurement results of dynamic parameters were filtered by the low-pass filtering and EMD method. Finally, smooth test curves of dynamic parameters were obtained. This research can provide a method reference for the measurement technology and data processing of gun test. Introduction Gun live firing was a very complex dynamic process with intense vibration, which brought a great inconvenience for the gun test measuring. The improvement of gun informatization level also required that the measurement technology of dynamic parameters should be efficient, intelligent, portable and intensive. Therefore, the paper selected four common dynamic parameters, and carried out study on measurement technology and test data processing. Measure programs of dynamic parameters Measurement program of recoil displacement Measurement sensors of recoil displacement mainly consisted of the steel-belt speedometer, the photoelectric steel-belt speedometer and the cable-type displacement sensor . The cable-type displacement sensor was the most widely used for the advantages of small volume, low mass and high precision . On the measurement process, the body part of the displacement sensor was fixed on the inertial navigation system, and the cable part the displacement sensor was connected to the breech. The displacement sensor type was PT5DC, with the range of 50 inches. Measurement program of recoil resistance Recoil resistance mainly consisted of three parts, the recuperator force, the recoil brake force and the constant resistance . According to the composition of recoil resistance, the measurement program was set up. (1) The initial gas pressure of recuperator was measured by the pressure gauge of PY-100 type with the range of 10MPa. (2) Each chamber pressure of recoil brake was measured by the piezoelectric pressure sensor KISTLER 7005 with the range of 60MPa. (3) The firing angle was measured by the quadrant. Measurement program of gun carriage stress Gun carriage stress was measured by the resistance strain gauge. Resistance strain gauge can convert the stress change into the resistance change. The stress test principle was shown in Figure 1. 5th International Conference on Information Engineering for Mechanics and Materials (ICIMM 2015) © 2015. The authors Published by Atlantis Press 717