VIBRATION

Japan Quality

Since its establishment in 1975 in Japan, SHINKEN has been accumulating knowledge of and experience in Vibration with the world-first productization in 1977 of the Electro-dynamic Multi-axis Vibration Test System (patented in US, UK and Japan) and development of a variety of customized Vibration Test Systems (some patented) & Vibration-related Products by overcoming many tough difficulties.

Electro-Dynamic Vibration Test Systems

Basically, there are 3 mechanism types of the Vibration Test Systems.

Most cost-effective systems that SHINKEN uses.

Usable only for simple "far-from-real-world-vibration" sine tests, have almost become extinct as "more-realistic-real-world-vibration" random tests have become more popular.

Featured by large force, are usually slightly less expensive than the Electro-dynamic Vibration Test Systems as far as larger systems than 50kN with large vibration tables are concerned, while the running cost including the maintenance cost for the Hydraulic Systems is far higher with a lot of oil being used. Also the hydraulic power supply system used for the Hydraulic Systems caused a high noise problem. In addition, the usable upper frequency of the Hydraulic Systems is said to be much lower than that of the Electro-dynamic Systems at about 200Hz as well as to be less controllable due to slow oil response against input control signals.

“Guide Bearing Systems” (Hydrostatic Bearing System / Air Bearing System)

“Guide Bearing Systems” as a Core of Vibration Generators, playing a main role making movements of the Moving Mass of the Vibration Generator smooth. One of the main reasons of high reputation of SHINKEN’s technology is “Guide Bearing Systems”. With SHINKEN only able to employ “Hydrostatic Bearing” and “Air Bearing” for guiding the Moving Mass of the Vibration Generator. Different from the conventional Mechanical Guide Systems, both Guide Bearing Systems involve little mechanical friction thus achieving high waveform fidelity and reduction in consumable parts contributing to cut in maintenance cost.

High waveform fidelity leading to high repeatability of vibration test results

High waveform fidelity of the Hydrostatic Bearing System and Air Bearing System permits for high repeatability of vibration test results thus making it easier to find quality problems.

In-company Comparison of Acceleration Waveforms between the Hydrostatic Bearing System and the Conventional Mechanical Bearing System

Little frictional wear allowing for high waveform fidelity for a long time

Supplying high-pressure oil or high-pressure air to the sliding part can get rid of mechanical friction wear thus keeping high waveform fidelity for a long time.