Vibrational excitation and control platform with changeable mass, damping and rigidity

Abstract

Provided is a vibrational excitation and control platform with changeable quality, damping and rigidity. Balancing weights with different masses are arranged on the upper portion of a vibration platform, and thin iron strips are fixed at the two ends of the lower surface of the vibration platform; the two ends, corresponding to the thin iron strips in position, of a base of the vibration platform are provided with sliding rails, electromagnetic bases are arranged in the sliding rails, electromagnets are fixed on the tops of the electromagnetic base, a zinc plating iron tank is fixed in the base of the vibration platform between the sliding rails, an electromagnet is fixed in the zinc plating iron tank, a zinc plating iron core and an eddy-current transducer probe are sequentially fixed on the top of the electromagnet, the lower portion of a thin-wall cylinder fixed on the lower surface of the vibration platform is located in a gap between the inner side wall of the opening of the zinc plating iron tank and the zinc plating iron core, a damping coil is arranged on the outer wall of the thin-wall cylinder in a wound mode, and an outgoing line is connected with a wiring terminal which adheres to the surface of the thin-wall cylinder on the upper portion and is partially connected with an external control and power amplifier; the mass of the platform is changed through changing of the different balancing weights, and the platform does not comprise various dampers and flexible supporting bodies and can achieve rigidity changing and damping controllability.

Description

Technical field [0001] The invention relates to a vibration excitation and control platform, in particular to a vibration excitation and control platform with variable mass, damping and rigidity. Background technique [0002] Vibration excitation and control platforms are widely used in aerospace, machining, construction, metallurgy and other fields to eliminate unfavorable vibration or provide a specific vibration environment. The design and development of vibration excitation and control platforms have very significant economic and scientific value . However, the existing vibration excitation and control platform has the following problems: 1. The damping and stiffness of the passive vibration control platform cannot be adjusted, and it can only passively eliminate the unfavorable vibration, the vibration suppression effect is poor, and it cannot provide a specific vibration environment; 2. Active or mixed active and passive vibration excitation and control platforms are gener...

AI Technical Summary

Problems solved by technology

However, the existing vibration excitation and control platforms have the following problems: 1: The damping and stiffness of the passive vibration control platform cannot be adjusted, and can only passively eliminate unfavorable vibrations, the vibration suppression effect is poor, and it cannot provide a specific vibration environment; 2: Active or active-passive hybrid vibration excitation and control platforms are generally composed of exciters, counterweights, dampers and elastic supports. Different dampers and elastic supports provide different damping and stiffness conditions. During use, often The damper and elastic support need to be replaced many times, which is inconvenient to use and low in efficiency

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