Research on Application of Electrodynamic Vibration Test Systems in Product Reliability Testing

Abstract
Electrodynamic vibration test systems adopt electromagnetic induction as the core principle to accurately simulate vibration environments under transportation, operation, impact and other working conditions. They are used to evaluate the vibration resistance, structural stability and long-term service reliability of various parts and finished products throughout their service life, serving as key equipment for industrial quality inspection, R&D verification and compliance certification. Taking LISUN LVD-100KG vibration test systems as the research object, this paper expounds its working principle, technical parameters, applicable standards and application value. Combined with measured data, it illustrates the important role of the system in improving product quality, reducing failure risks and meeting domestic and international standards, providing a reference for model selection and test implementation in related industries.

Introduction

In industries such as electrical and electronic products, auto parts, lamps, packaging, rail transit and new energy, products are continuously subjected to vibration of different frequencies, amplitudes and directions during warehousing, transportation, assembly and service. It is easy to cause faults such as solder joint falling off, structural cracking, poor contact and seal failure, which directly affect product safety and service life. Traditional manual sampling inspection and simple vibration devices cannot reproduce real working conditions. In contrast, electrodynamic vibration test systems generate stable and reproducible vibration waveforms through controllable electromagnetic excitation, realizing quantitative, directional and timing mechanical environment simulation, and have become standard equipment for product R&D, type test and factory inspection.

LISUN LVD-100KG vibration test systems are designed for medium-load general vibration testing requirements. They support four-dimensional and six-dimensional vibration modes, compatible with a number of national and international standards. Equipped with functions including sine vibration, frequency sweep, programmable control, high acceleration, amplitude and time coordinated control, the systems can efficiently complete verification of vibration resistance, stability and reliability, and are widely applied in quality control of various industries.

Working Principle of Electrodynamic Vibration Test Systems

The core of vibration test systems lies in the electromagnetic energy conversion mechanism based on Ampere’s law. The system consists of vibration table body, power amplifier, closed-loop controller, sensors, cooling and protection units. The controller generates target waveform and parameter commands, which are amplified into alternating current by the power amplifier. The moving coil winding is placed in the air gap with high magnetic induction intensity, generating periodic electromagnetic force under the action of magnetic field to drive the tabletop and test piece to perform controlled vibration. Acceleration and displacement sensors feed back signals in real time, and the controller corrects the output in a closed loop to ensure high precision and stability of frequency, amplitude and acceleration.

This principle realizes accurate waveform reproduction (sine half-wave / full-wave), continuous wide-band frequency sweep and multi-section programmable cycle, multi-directional output of vertical / horizontal / six-degree-of-freedom, and long-term stable continuous operation to meet fatigue and durability tests.

Core Parameters of LISUN LVD-100KG Vibration Test Systems

As medium-load universal vibration test systems, the key technical indicators of LISUN LVD-100KG are shown in the table below:

Parameter Item	Technical Index	Remarks
Model	LVD-100KG (Four-dimensional); LVD-100KG-6D (Six-dimensional)	Vertical + Horizontal / Three-axis Six-degree-of-freedom
Table Size	500 mm×500 mm	Customized size available
Maximum Load	100 kg	Suitable for parts and small & medium-sized complete machines
Amplitude Range	0～5 mm (Adjustable)	Peak-to-peak displacement
Vibration Acceleration	0～20 g (Adjustable)	Cover conventional and enhanced tests
Frequency Range	1～600 Hz	Dual mode of frequency sweep & programmable
Frequency Accuracy	Display: 0.01 Hz; Control Accuracy: 0.1 Hz	High-precision closed-loop control
Vibration Waveform	Sine Wave (Half-wave, Full-wave)	Meet mainstream test requirements
Control Function	Sine, Frequency Sweep, Programmable, High Acceleration, Amplitude Control, Time Control, 1～15 Sections Cycle	Full parameter visual setting
Data Management	Real-time recording, storage and traceability	Support test report export

Applicable Standards and Compliance Capacity

LVD-100KG vibration test systems are compatible with a number of domestic and international standards, covering machinery, electrical engineering, packaging, lamps and other fields, providing guarantee for the compliant application of vibration test systems.

Domestic Standards: GB/T 13309-91, JJG 189-97, GB/T 4857, GB/T 2423, GB/T 7000.1 (IEC 60598-1:2020) and other relevant specifications.

International Standards: ISO 2247, ISO 13355, IEC 60068, ASTM D999, ASTM D4728, ASTM D3580, etc.

For CNAS accredited high-precision vibration testing, LISUN LVD-AT10 series electrodynamic vibration test equipment is optional to meet laboratory accreditation requirements.

System Functions and Test Value

Core Test Functions
• Vibration Resistance Test: Apply fixed-frequency / frequency sweep vibration to inspect structural strength, fastening reliability and fatigue resistance, and identify weak links such as cracking, loosening and fracture.
• Stability Test: Conduct long-term constant vibration to monitor the retention capacity of electrical performance, mechanical precision and sealing state, and evaluate the stability of continuous service.
• Reliability Verification: Simulate vibration load during the whole life cycle, predict service life, screen early failures, optimize design, and reduce market rework and safety risks.

Key Technical Advantages
• Multi-dimensional Vibration: Four-dimensional / six-dimensional configuration reproduces real scenarios such as transportation bumping, equipment operation and road surface impact.
• High-precision Control: Frequency resolution up to 0.01 Hz, acceleration continuously adjustable from 0 to 20 g, with excellent test consistency and reproducibility.
• Programmable Cycle: 1～15 sections of parameters can be set freely, supporting sweep curves such as low→high, high→low, low→high→low, adapting to complex working conditions.
• Easy Operation & Maintenance: Touch screen human-machine interface, one-click parameter setting, automatic data saving. With more than ten years of market verification, it has a perfect after-sales service system.

Application Fields and Practical Significance

Vibration test systems have become core equipment in the industrial quality system. Typical application scenarios of LVD-100KG include electrical and electronic products, lamps, auto parts, packaging transportation, rail transit, new energy and other industries. It can verify the vibration resistance of PCB and connectors, meet vibration safety requirements of lamps, test driving fatigue strength of auto parts, assess packaging damage risks during transportation, and guarantee long-term operation reliability of industrial components.

Practical significance: Through quantitative verification by electrodynamic vibration test systems, enterprises can locate defects in the R&D stage, strictly control quality in mass production, and meet certification requirements before delivery, which significantly improves product consistency and market competitiveness.

 Conclusion

Electrodynamic vibration test systems realize accurate, controllable and reproducible vibration environment through electromagnetic simulation, and are the core means to judge the vibration resistance, stability and reliability of products. As mature and reliable vibration test systems, LISUN LVD-100KG features 100 kg load capacity, wide frequency band, high precision, multi-directional operation and programmable control. It adapts to the standard and test requirements of various industries, effectively shortening the R&D cycle, reducing failure probability and improving product quality. It is suggested that relevant enterprises select models with reference to load, direction, frequency and certification level, and give priority to brand models verified by the market for many years to ensure scientific, standardized and effective vibration tests.

Tags：LVD-100KG-6D