Magnetorheological damper specifications

Each viscous damper has its limits and does with magnetorheological fluid within it. Some of the main concerns on the magnetorheological damper features are the two of these: how fast could it be? How powerful can it possibly be?

I will address these issues in this article.

Response time of magnetorheological damper

There are tests put together by a research group in Aalto University with a rectangular reference signal on actuators with magnetorheological fluid. During this study, the rising edge changed 0.8 ms response time ms depending on if the experiment a valve 1.9 concerned or a membrane actuator combined with the valve. The falling edge of 1.5 ms response time varied ms respectively to 7.4. from what I know, these are by far the best response times reported for count on magnetorheological fluid actuators.

In my personal findings is the vibration pitch that I finally dead, 25 Hz. my actuator per se can perform on a much higher frequencies-I have tested up to 70 Hz-but the resonance peak in my current situation is particularly poignant on this frequency. But what is fantastic in absorbers with magnetorheological fluid, is that they can be programmed to eliminate what you want, as long as you stay under the highest possible frequency can soften the damper frequency.

The groundhook control line has been applied in my application of the presumption that the Word still remains. If we further the oscillation of the motor unit, then the law is sinusoidal expect that the damper itself produces during the negative half of the vibration acceleration curve should stiffen. At 167 Hz (the absolute highest frequency price pressure), is the period for magnetorheological fluid to determine its State, about 3 ms.

This sets a condition for the damper response time. 1/4 Period time (ca. 1.5 ms) increase and another 1/4 period down (despite the fact that rising edge usually is faster than the falling edge).

Magnetorheological damper Force condition

As indicated by my estimates, an engine of 800 kg vibrating at 167 Hz damping implies a replacement silencer power of 19.6 n If 60% damping will be achieved. Support when this force is divided into four corners of a motor, the power required for a single actuator bedplate would release around 5 n. still, thanks to the superposition of the frequencies, the power any time would be increased. That is why the demand here was multiplied by the factor 10 since after talks with the damper developer, I learned that it is still in the range magnetorheological fluid dampers of this general scale can be achieved.

As a summary, the following damper specs for this kind of a motor in the following example be set:

Force of 50 N

1.5 Ms response time

As it turns out, a magnetorheological fluid damper that contains this kind of specs.

For further information on magnetorheological dampers and relevant equipment, check out http://www.magnetorheologicaldamper.com/. Magnetorheological damper laboratory gives some suggestions for anyone who wants to get or create a damper based on magnetorheological fluid. When choosing your damper technologies, choose magnetorheological!

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