ASTM D4169 Electromagnetic Vibration Testing Machine for Sine, Random and Shock Testing

The Electrodynamic Vibration Test System is designed for sine, random and mechanical shock testing to evaluate product durability and vibration resistance under simulated environmental conditions. Featuring a maximum excitation force of 1000kgf, a frequency range of 1–3000Hz and acceleration up to 100G, this system is widely used for reliability testing of automotive components, electronic products, aerospace equipment and industrial assemblies. It integrates an electromagnetic shaker, digital power amplifier and advanced vibration controller for comprehensive laboratory testing.

Vibration machine selection formula and vibration generator structure diagram

1. The test conditions provided by customer’s company;
2. Test type: Sine sweep; Random; Shock
3. Frequency response range: 1-3000Hz
4. Formula: A(g)=(2πf)2Dcm/980≒A=0.002DmmF² D=A/0.002F²

F=M(kg) ×A(g)

• Three-in-One Testing Capability: Supports sine vibration, random vibration and classical shock testing through one integrated system.
• High Excitation Performance: Delivers up to 1000kgf sinusoidal and random excitation force, with a maximum shock excitation force of 2000kgf.
• Wide Frequency Coverage: Operates within a shaker frequency range of 1–3000Hz, suitable for a broad range of vibration simulation requirements.
• Advanced Digital Control: DSP-based vibration control technology provides real-time signal processing, closed-loop regulation and accurate test execution.
• Flexible Test Configuration: Equipped with vertical expansion and horizontal oil-film slip tables for different specimen mounting arrangements.
• Comprehensive Safety Protection: Integrated monitoring functions help protect the shaker, amplifier and test specimen against abnormal operating conditions.
• Automatic Centering: The photoelectric positioning system maintains the moving coil in its balanced operating position.
• Automated Test Reporting: Test data can be recorded, analyzed and exported into Word or PDF reports.

Vibration Testing Machine Installation Diagram

1.1 Moving coil

The vibrating table is equipped with cast and manually machined moving coils, optoelectronic load support system and dual bearing axial guidance. Dual bearing guidance is a unique feature that helps reduce dynamic axial crossing and rotation during vibration testing for superior durability.

1.2 Excitation coil

Double magnetic circuit structure, low flux leakage, uniform magnetic field.

1.3 body surface

Using advanced phosphating treatment and car paint technology, it has long-term anti-wear and anti-rust effects.

1.4 Table refrigeration:

Adopt low-noise fans and improve the air intake structure of the table body. The excitation coil adopts a honeycomb air duct, and the middle magnetic ring adopts a double-layer shunt air duct. A new air duct design is adopted to enhance the cooling effect.

LA series digital switching power amplifier adopts reliable IGBT technology:

a. High stability and reliability

b. Meet the requirements of the EU "CE" standard

c. Using sinusoidal frequency multiplication pulse width modulation technology, the signal-to-noise ratio of the power amplifier is high.

d. Using the working principle of switching power supply, the conversion efficiency is high.

e. Using electronic automatic current sharing technology

f. Good safety performance.

Complete protection functions, including power grid overvoltage, under voltage, phase loss, logic fault, power module pass-through, over temperature, output overcurrent, output overvoltage, drive power, platform over-displacement, platform temperature, external interlocking, etc.

The extension platform is usually used as a platform for larger mounting specimens and can be square or round or user-defined. To reduce the impact of the dynamic characteristics of the extended platform, all the extended platforms must be modeled and analyzed for their modal frequencies. These extension platforms are typically cast from magnesium alloy and have damping material attached.

Automatically adjust the position of the moving coil to keep it in a balanced state. An automatic centering system ensures that the moving coil is always centered during loading and unloading.

The horizontal slide design has a high overturning moment and lateral restraint. This design concept, combined with a standard horizontal slide arrangement, has a high dynamic moment limit while maintaining the guiding oil film damping characteristics. The horizontal slide table is composed of a slide plate, a connecting head, a natural granite slab, a horizontal slide table base, and an independent oil source.

Vibration controller adopts advanced distributed structure system. The closed-loop control is realized by the DSP processor, and the PC is independent from the control loop. It ensures the real-time and high efficiency of the control system. It can respond to any changes in the test system in a timely and rapid manner. Ensure the stability and high precision of the control. The hardware adopts a 32-bit floating-point DSP processor with a main frequency of up to 300MHz and an ADC/DAC with a 24-bit resolution. Low-noise design technology with high-precision floating-point digital filtering and hardware circuits. The controller randomly controls the dynamic range to be greater than 90dB, and the signal-to-noise ratio is greater than 100dB.

a. High performance and reliability

The closed-loop control is realized by the DSP processor, and the PC is independent from the control loop. It ensures the real-time and high efficiency of the control system. It can respond to any changes in the test system in a timely and rapid manner. Ensure the reliability and high precision of the control. All input channels have 24-bit resolution ADCs, low-noise hardware design, and built-in analog and digital anti-aliasing filters, which effectively guarantee the high precision of the analysis.

b. Easy to operate

The Windows-based application software is easy to operate and rich in auxiliary functions. The system's powerful automatic wizard and automatic test report generation function make repetitive and boring test tasks easy. The test parameter settings are rich and rigorous, and the USB2.0 interface makes it more closely and harmoniously connected with the computer.

c. Powerful functions and flexibility

The vibration controller is a powerful vibration control platform that can complete multiple complex tasks. On the same hardware platform, different application software can be configured to complete a variety of analysis tasks to meet your different test and analysis needs. The controller adopts a modular design, and can configure corresponding hardware and software according to different user needs to meet different needs.

d. Test safety

The controller provides small-scale signal control to get a preview of system vibration control. This method helps test engineers predetermine noise levels. And have a rough understanding of the transfer function and other characteristics of the system. There are also multiple safety checks and interlock settings. The safety of testers, test objects and vibration table equipment is guaranteed to the greatest extent. If there is an abnormality in the system, you can immediately press the system's built-in termination key to end the test.

e. Test report generation

It supports one-click quick generation of test reports in word format or PDF format. You only need to click the report generation button to get the current test results. From the description of the basic test control function to the specific test setting parameters, from the control target spectrum curve to the test time domain and frequency domain curve, everything is available. It is convenient for you to modify and make according to different test report specifications. It can be directly printed and previewed, and can be sent online.

According to the user-defined power spectrum diagram (made by the target spectrum editor), random control adopts the method of transfer function equalization. Continuously output Gaussian random signals to quickly implement real-time and accurate multi-channel closed-loop control. Built-in adaptive control algorithms react quickly to system nonlinearities, resonant frequency, and load changes.

Frequency range: 0~4800Hz, extendable to 18750Hz

Resolution: 100, 200, 400, 800, 1600, 3200 spectral line

Control power range: >90dB

Control strategy: single channel control, weighted average, maximum value, minimum value.

Sine provides analog-quality sine and sine sweep signals with control over the amplitude of the sine waveform. The dwell magnitude, dwell frequency can be set, and the dwell duration can be determined by setting the time or the number of cycles of the sinusoidal signal.

Frequency range: 1Hz~5000Hz, expandable to 10000Hz

Closed loop time: 5ms

Harmonic distortion: <-100dB

Frequency sweep mode: linear frequency sweep 0~6000 Hz/min

Logarithmic sweep 0~100 Oct/min

Sweep direction: up, down

Sweep duration: can be set as the number of sweeps or test times.

Adopt transfer function equalization method, support half sine wave, bell wave, rectangular wave, trapezoidal wave, front peak sawtooth wave, back peak sawtooth wave, triangular wave. Users can also input pulse peak value according to their needs.

Pulse duration from 0.5 to 3,000mS

Maximum analysis bandwidth 18750Hz

Frame size: up to 16384

Meet the standards: ISO standard, user-defined interrupt control limit.