Hopkinson press rod system with true triaxial dynamic loading and testing functions and method

Abstract

The invention relates to a Hopkinson press rod system with true triaxial dynamic loading and testing functions and a method. By using a true triaxial Hopkinson rod device, and imposing a controllablesingle-shaft impact overload on a fixed substrate (basis) of a triaxial high g value accelerometer, by use of the Poisson effect of an elastic substrate, synchronous overload is generated in other twovertical (auxiliary axes Y and Z) directions which are perpendicular to the loading (main axis X) direction. Based on a triaxial direction elastic rod, the accelerator triaxial g value response is acquired, so it is achieved that dynamic calibration is simultaneously performed on the triaxial high g value accelerometer in three orthogonal directions. The beneficial effects are that the Hopkinsonpress rod system is not only an excitation signal generator, but also a signal acquirer. Thus, a complex decoupling structure can be avoided; simultaneous loading in three directions can be achieved;single-axis or bi-axis dynamic characteristic calibration can be performed; and the system is widely applicable, simple in operation, high in repeatability and high in measurement precision.

Description

technical field [0001] The invention belongs to the true three-axis dynamic calibration technology of a three-axis high-g value accelerometer, and relates to a Hopkinson pressure bar system and method with true three-axis dynamic loading and testing functions. The fixed base (foundation) of the high-g value accelerometer applies a controllable uniaxial impact overload, using the Poisson effect of the elastic base, in the other two vertical directions (secondary axis Y and Synchronous overload is generated in the Z) direction, and the three-axis g-value response of the accelerometer is obtained by means of the elastic rod in the three-axis direction, so as to realize the simultaneous dynamic calibration of the three-axis high-g-value accelerometer in three orthogonal directions. Background technique [0002] refer to figure 1 , Literature: Yuan K, Guo W, Su Y, et al. Study on several key problems inshock calibration of high-g accelerometers using Hopkinson bar[J]. Sensors an...

AI Technical Summary

Problems solved by technology

refer to figure 2 The adjustable three-axis calibration table can realize the three-axis calibration of the dynamic characteristics of general accelerometers with low g value. On the one hand, because the excitation signal with too high g value cannot be generated, for high g Accelerometers cannot perform full-scale dynamic calibration; on the other hand, in order to achieve simultaneous loading in three directions, this kind of three-axis calibration platform needs to design a very complex decoupling structure bearing platform, so that the respective loading directions do not affect each other. , this platform is equipped with an accelerometer, it is difficult to achieve ideal three-way decoupling in actual operation

At the same time, it is very complicated to realize the synchronization of independent loading in the three-axis direction and the consistency of shock wave configuration.

Images