Vibrational excitation method and device capable of automatically tracing natural frequency

Abstract

The invention discloses a vibrational excitation method and device capable of automatically tracing natural frequency. The vibrational excitation device comprises a vibration table, a vibration sensor mounted on the vibration table, an electromagnetic vibration exciter connected with the vibration table through a connecting rod, and a vibration controller connected between the electromagnetic vibration exciter and the vibration sensor. The vibration controller comprises a signal converter and a limiting amplifier. According to the vibrational excitation method and device capable of automatically tracing the natural frequency, an exciting device does not need a signal source, the device is a closed-loop positive feedback control system, the device is in an instability state when starting to work, when the gain of the vibration controller is adjusted to be in an appropriate value, the device can automatically trace the natural frequency of the vibration table without external exciting, the vibration table always vibrates in a resonance state, the vibration amplitude is adjustable, adjusting is convenient, energy consumption is low, and the adaptive capacity to the environment is strong. The vibrational excitation device is simple in structure, low in cost, convenient to use and capable of adapting to complex environments.

Description

technical field [0001] The invention relates to a vibration device that uses the principle of self-excited resonance to automatically track the natural frequency of the system, so that the device always works in a resonance state. In order to achieve the purpose of increasing vibration amplitude and reducing energy consumption, it is suitable for vibration utilization in processing, manufacturing and other industries. Background technique [0002] Vibration devices are widely used in various industries, such as vibrating feeders, vibrating conveyors, vibrating decorations, etc. In vibration utilization engineering, how to generate the largest possible vibration amplitude under the condition of limited input energy is of great significance for improving the efficiency of vibration devices. [0003] At present, most vibrating devices use vibrating motors to generate forced vibrations, which are generally in a non-resonant state. The required excitation intensity is relatively...

AI Technical Summary

Problems solved by technology

[0003] At present, most vibrating devices use vibrating motors to generate forced vibrations, which are generally in a non-resonant state. The required excitation intensity is relatively large, which reduces the working efficiency of the vibrating device and increases energy consumption.

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