Electric vibration testing machine is currently a widely used vibration equipment. Its frequency range is wide, with a small vibration table frequency range of 0-10kHz and a large vibration table frequency range of 0-2kHz; Wide dynamic range, easy to achieve automatic or manual control; The acceleration waveform is good and suitable for generating random waves; A large acceleration can be obtained. The vibration testing machine is designed based on the principle of electromagnetic induction. When an electrified conductor is in a constant magnetic field, it will be subjected to force. When an alternating current is passed through the conductor, vibration will occur. The driving coil of the vibration table is officially located in a gap with high magnetic induction intensity. When the required vibration signal is generated from the signal generator or vibration controller and amplified by the power amplifier and passed to the driving coil, the vibration table will generate the required vibration waveform.

The electric vibration testing machine is basically composed of five parts: the driving coil and moving parts, the hanging and guiding device of the moving parts, the excitation and demagnetization unit, the platform and the supporting device. The driving coil and moving parts are the core components of the vibration table, and their first-order resonance frequency determines the frequency range of the vibration table. Due to the complex structure of the moving parts, the calculation of the first-order resonance frequency is very difficult and requires empirical estimation, which often leads to design errors. In the late 1980s, the limited method was first applied to calculate the resonance frequency of the moving parts of an electric vibration table by 702 Institute. This not only improved the accuracy of the calculation results, but also facilitated the optimization design of the structure, greatly increasing the reliability of the vibration table design.

The generation methods of the driving coil current of the electric vibration testing machine include direct and induction methods. The direct method is to directly apply the current output by the amplifier to the driving coil, which is the mainstream of vibration tables. Induction type is to pass alternating current into a fixed coil, and then generate current in the driving coil through induction. The driving coil of the induction vibration table does not require cables to be led out, and the structure is simple, but the efficiency of this vibration table is relatively low. Some vibration tables of UD Company in the United States adopt this structure. The products of 702 Institute and other companies use direct type, and because the electric vibration testing machine effectively solves the problem of driving coil lead out cables, its products are more practical.

Aisili specializes in manufacturing electric vibration testing machines, which have excellent quality and a good reputation. Aisili has become a shining new star in today's market. With thirty years of technical accumulation and thirty years of honing, we have become sharp. Here, we would like to thank our new and old customers for their continuous support and cooperation.