Spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method

Abstract

The invention discloses a spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method. The method comprises the following steps of: 1) erecting six-displacement-sensor parallel measuring and damping vibration attenuating mechanism; 2) fixing a detected motion object and a fixed platform; 3) obtaining a motion variation rule by using an expansion variation displacement time of an expansion pull rod, and obtaining a vibration rule of the detected motion object by using a measurement algorithm with a positive solution; 4) obtaining a damping value of a six-degree-of-freedom controllable damper required by the vibration by using a damping vibration attenuating algorithm; and 5) adjusting the damping value of the six-degree-of-freedom controllable damper to a value obtained by the damping vibration attenuating algorithm. According to the invention, six-degree-of-freedom measurements of three vibration displacements and three vibration angles of the motion object at the same measurement point are achieved by using one set of mechanism; meanwhile, the vibration control of the motion object can be achieved; and the spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method disclosed by the invention has the advantages of high accuracy, simple structure, good flexibility, strong adaptability, wide application range and the like.

Description

technical field [0001] The invention relates to a vibration measurement and damping vibration reduction method with six degrees of freedom in space. The parallel mechanism of six displacement sensors is used to perform dynamic measurement of mechanical vibration displacement with six degrees of freedom in space for moving objects, and six groups of single degrees of freedom with spherical joints installed at both ends are used. The dampers are connected in parallel to form a space six-degree-of-freedom vibration damping shock absorber to reduce the vibration of moving objects according to actual needs. [0002] Six-degree-of-freedom vibration in space includes three-degree-of-freedom vibration displacement x(t), y(t), z(t) and three-degree-of-freedom vibration angle θ x (t), θ y (t), θ z (t), the vibration displacement and angular differentiation can be converted into vibration velocity, vibration acceleration, vibration angular velocity, and vibration angular acceleration. ...

AI Technical Summary

Problems solved by technology

In order to achieve mutual non-interference, the structure is bound to be very complicated, and the purpose of multi-degree-of-freedom vibration reduction cannot be well achieved.

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