Mechanical shaft system revolving error active compensation device based on piezoelectric actuators

Abstract

The invention discloses a mechanical shaft system revolving error active compensation device based on piezoelectric actuators, relates to the technical field of rotor vibration active inhibition, andsolves such actual problems as difficult prominent improvement of the revolving precision of a traditional rolling bearing support shaft system through machining and assembly links and influence on the machining precision of a machine tool by revolving errors. Multiple piezoelectric actuation assemblies are arranged in symmetric positions of the outer side surfaces of a rolling bearing base, and are mounted on the outer side surfaces of the rolling bearing base through insulation cushions; pretightening force is applied in mounting of the piezoelectric actuators; actuator supports sleeve the rolling bearing base; the multiple piezoelectric actuation assemblies are positioned between the rolling bearing base and the actuator supports; a sensor is used for measuring radial information of a selected measuring point of a rotating main shaft; an active compensation control algorithm is operated in a control circuit; information to be compensated is calculated on the bearing base according to position signals measured by the sensor to generate control signals for driving the piezoelectric actuators; and a driving circuit magnifies the control signals generated by a controller to load onthe piezoelectric actuators.

Description

technical field [0001] The invention relates to an active compensation device for rotation error of a mechanical shaft system, and relates to the technical field of active suppression of rotor vibration. Background technique [0002] Precision shafting is one of the basic functional components of high-end CNC machine tools, robots, precision instruments and other equipment, and is widely used in industrial production. The rotation accuracy of precision shafting determines the performance and value of precision equipment, and also determines the technical level of precision machining and precision measurement in a country. It is of great significance to design precision shafting with higher rotation accuracy. In practical applications, traditional rolling bearings are used as supporting elements for the vast majority of the shafting system. The relatively long-term reality is that the accuracy of this traditional mechanical shafting system has been difficult to achieve substa...

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Problems solved by technology

[0004] The invention aims to solve practical problems such as the fact that the rotation accuracy of the traditional rolling bearing supporting shaft system is difficult to obtain a breakthrough improvement through machining and assembly, the rotation error affects the machining accuracy of the machine tool, and the pointing accuracy of precision equipment. compensation device

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