The high-frequency vibration test bench, as a key equipment for simulating the dynamic environmental adaptability of products, directly affects the testing accuracy and reliability evaluation of product development quality. Aisili and other manufacturers have built an accuracy assurance system covering hardware, software, and environment through three core technologies: structural innovation, closed-loop control, and dynamic calibration, combined with standardized operations throughout the entire process.

1、 Structural innovation: reducing energy loss and signal distortion

The mechanical structure of the high-frequency vibration test bench is the foundation of accuracy. AsliES-3The series adopts a dual magnetic circuit structure, which works together with the main and auxiliary magnetic circuits to improve the uniformity of the magnetic field40%Control the fluctuation of excitation force within±1%Within. The self generated skeleton dynamic coil adopts high-strength aluminum alloy integrated molding, which reduces the quality distribution error of the dynamic coil compared to traditional welding processes65%Breakthrough of first-order resonance frequency1200HzEffectively suppress high-frequency energy attenuation. In addition, the air suspension support system replaces traditional springs and forms non-contact support through compressed air, reducing frictional resistance0.5Ndrop to0.05NEnsure that the vibration waveform is within5Hz-4000HzDistortion within the frequency band<2%.

2、 Closed loop control: dynamic correction of millisecond level response

The test bench uses acceleration-The displacement dual closed-loop control system achieves high-precision control. withES-3For example, itsDA-3The sampling frequency of the power amplifier reaches20kHz, can capture vibration waveform deviation in real time, and throughPIDAlgorithm adjusts the output current. for example, in1000m/s²In the impact test, the system can2msInternally correct the displacement deviation of the vibration table to ensure that the actual acceleration is less than the set value error1.5%For random vibration testing, the equipment adoptsFFTSpectrum analysis technology, updated every second1024Point spectrum data, automatically compensating for harmonic distortion, making the correlation coefficient between the control spectrum shape and the target spectrum shape>0.98.

3、 Dynamic calibration: full frequency accuracy traceability

To eliminate performance drift caused by long-term use, the high-frequency vibration test bench needs to be dynamically calibrated regularly. Aisili adopts a calibration scheme combining laser interferometry and comparison method: the actual displacement of the vibration table is measured by a laser vibrometer, and compared with standard accelerometer data to generate a full frequency band（5Hz-4000Hz）Calibration curve. For example, during a calibration, it was found that1500HzFrequency point amplitude deviation reaches3.2%After adjusting the balance weight of the moving coil, the deviation was reduced to0.8%In addition, the device is equipped with a built-in self diagnostic system that can monitor the zero drift of the sensor in real time. When the sensitivity of the acceleration sensor changes beyond1%Automatically trigger the calibration process.

4、 Full process control: standardization from environment to operation

Minor changes in the testing environment can also affect accuracy. Aisili requests that the installation environment temperature of the test bench be controlled within20℃±2℃Humidity<65%RHAnd reduce environmental vibration interference through vibration isolation foundation0.01mm/s²following. At the operational level, the device provides standardized testing templates, and users only need to input themGB/T 2423.11Waiting for the standard number, the system automatically loads parameters such as sweep rate and shutdown conditions. For example, when performing a sine sweep test, the template specifies that the linear sweep rate should not exceed1oct/minTo avoid missing resonance points due to excessive speed.

The accuracy guarantee of high-frequency vibration test bench is a dual result of technology integration and process management. Aisili reduces system errors through structural innovation, achieves dynamic correction through closed-loop control, ensures long-term stability through dynamic calibration, eliminates environmental interference through full process control, and ultimately enables equipment to1000m/s²Repetitive error in impact testing<1%, in2000HzPower spectral density control error in random vibration<3dBIt provides reliable testing data support for fields such as aerospace and automotive electronics.