Research On Life Prediction Model And Bore Comprehensive Parameters Detection System For Gun Barrel

The changes of bore parameters will affect the gun barrel’s life, firing precision and launch safety directly.If bore parameters is detected automatically, reliably and efficiently, it can not only test the gun barrel’s quality qualifiedly, but also offer great realistic significance to the life prediction and the safe use of gun barrel.This paper carries on the related theory and experimental study around the gun barrel life prediction model and comprehensive bore parameters detection system.First, this paper analyzes the influence relation that the changes of bore parameters including inner diameter,bending and inner surface quality affect the operational performance and the gun barrel life based on the study of gun barrel life prediction technology.Because the radial wear is one of the important factors which affects the gun barrel’s life, the paper establishes the gun barrel life grey prediction model about the wear volume and the number of projectile by using the grey system theory. Based on grey GM(1,1) model, a new grey combination forecast model and a optimization grey Verhulst model are established. They can effectively forecast the gun barrel’s life and the maximum number of projectile at the end of life.The gun shooting range test data and related literature data show the correctness of the model through data validation.Second, according to the decline of muzzle velocity of projectile and bore pressure caused by radial wear and the phenomenon of the projectiles scattered, elastic tape dubbing, premature explosion of projectile, fuze dud in a row and near-bombs and so on, the parer establishes a dynamic evaluation model of the gun barrel life level by the optimized grey clustering algorithm and Delphi Technique method. It can definitely assess the membership degree of state of the body tube life in"qualified","as in" and "scrap", and it can reject the guns which will become invalid out of the battle sequence in advance. So the state of war or training can be protected well and the use and the maintenance of artillery can be improved effectively.Finally, in order to improve the inner wear sampling value, the related parameters detection precision of the processing quality and in view of the problems that the present gun bore parameters detection accuracy is not high, low efficiency, structure dispersion at the same time, the paper uses modular design method to design a set of comprehensive bore parameters detection system of gun barrel with three functions, measurement of internal diameter, inner surface and bending. In this paper, the design of the parameters bore comprehensive test system is experimentally studied. The study focus on field testing and calibrating the body tube inner diameter, curvature and bore surface quality, and the corresponding error model is established to improve the test accuracy.Using CCD camera probe endoscopic technology is put forward, which can realize the fast and direct collection of bore image clarity and provides a clear basis for the rating and maintenance of surface quality of the gun barrel life. For the current test difficult of fault depth measurement (especially the long gun barrel), it designs the laser displacement sensor fault depth measurement method of scanning technology. Compared with traditional artificial rubbing method and image depth value method, the method is more simple and more direct, and the method can carry out rapid and accurate measurement.