Describe how resonance in a domestic spin-dryer could be overcome?

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SUMMARY

The discussion focuses on overcoming resonance in domestic spin-dryers by utilizing a vibration sensor integrated into the internal unit. This sensor detects rotary vibratory movements and transmits data to a controller, which evaluates these movements in real-time to adjust the electric motor's operation. By controlling the motor based on sensor feedback, unbalance-dependent resonance phenomena can be effectively dampened and mitigated. The solution emphasizes the importance of real-time monitoring and control to enhance the performance of washing machines and spin-dryers.

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Homework Statement


Describe how resonance in a domestic spin-dryer could be overcome?


The Attempt at a Solution



The internal unit of a washing machine or spin-dryer normally includes a washing container, which has a laundry drum mounted in the container such that it can rotate, and an electric motor for driving the laundry drum via a reduction gear, a transmission, or direct drive. The internal unit is suspended in a machine housing such that it can vibrate and constitutes an overall system which can vibrate in a damped manner and which is subject to unbalance-dependent resonance phenomena in specific regions of the rotational speed of the laundry drum. The causes of these resonance phenomena are vibratory movements due to momentary unbalances in the load in the laundry drum. To reduce these unbalance-dependent resonance phenomena, the internal unit is provided with a vibration sensor which is rigidly or substantially rigidly coupled to the internal unit.

So this vibration sensor detects the rotary vibratory movements of the internal unit about an axis of rotation and transmits the measured values of the vibratory movements to a controller; evaluating, in the controller, the measured values from the sensor in real time; and controlling the electric motor in dependence on an evaluation of the measured values. So resonance can be dampened and eventually overcome.

Does any of this make sense?
Is there any thing i can add to this?
Any help would be greatly appreciated, thanks.
 
Last edited:
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But what physical means would you use to do the actual damping? I didn't see that addressed in your text (sorry if I missed it).
 

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