System and method for synchronously acquiring load and response signals of machine tool vibration test

Abstract

The invention relates to a system and a method for synchronously acquiring load and response signals of a machine tool vibration test. The system comprises four parts, namely an excitation subsystem, a response signal acquisition subsystem, a data acquisition front end and a data processor, wherein the excitation subsystem comprises a power amplifier, a vibration exciter and a vibration exciting rod; the response signal acquisition subsystem comprises a force sensor, multiple acceleration sensors and multiple charge amplifiers; the input end of the data acquisition front end is connected with the response signal acquisition subsystem; one output end of the data acquisition front end is connected with the excitation subsystem, and the other output end of the data acquisition front end is connected with the input end of the data processor; and the data processor prestores a program for performing data processing on the load and response signals. The test system can be used for avoiding measurement errors caused by signal delay, filtering out errors in acceleration signals, and accurately analyzing the dynamic vibration response of each part and the complete machine of a machine tool, and has the advantages that the test is accurate, the operation is simple and the like.

Description

technical field [0001] The invention belongs to the field of machine tool vibration testing, in particular to a machine tool vibration testing system, in particular to a machine tool vibration testing load and response signal synchronous acquisition system. Background technique [0002] CNC machine tools are important basic equipment to realize the modernization of the equipment manufacturing industry, and their performance is an important symbol to measure a country's industrial modernization level and comprehensive national strength. With the development of CNC machine tools in the direction of high precision, compound and heavy load, higher and higher requirements are put forward for the vibration performance of each part and the whole machine in the process of machine tool processing. Machine tool vibration not only affects the machining accuracy and surface quality of the machine tool, but also affects the stability of machining accuracy and the reliability of the machi...

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Problems solved by technology

Moreover, because the acceleration sensor is used to measure the low-frequency signal, it is easy to be distorted, and there is high-frequency noise in the measured signal, and the secondary integration of the vibration signal directly in the time domain will lead to the amplification of small errors, so the displacement error obtained by this method is relatively large.

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