Inventor(s): Behrooz Fallahi
Abstract
This NIU inventor enables a semi-active suppression of unwanted vibrations in mechanical/architectural systems by using a novel self-tuning vibration absorber system. The design belongs to semi-active vibration suppression class whereby the apparent inertia of the vibration absorber is changed to achieve the desired performance. This is achieved through design of a carrier rod assembly partnered with a tuning mechanism. The tuning mechanism detects the vibration of the mechanical/structure system and positions the moving block of the carrier rod such that the phase difference between them becomes 90 degrees and thereby suppressing the vibration of the entire system. A hollow shafted motor is used as part of the tuning mechanism. This increases the tuning mass to carrier rod mass ratio and thereby increases the bandwidth of the device. The self-tuning absorber is particularly effective in reducing the hunting motion of railroad cars.
Potential commercial use and users:
Railroad industry, building and bridge architecture, manufacturing equipment
Advantages:
The motor of the innovative vibration absorber system acts as part of the tuning mass and thereby providing a higher bandwidth. Since this vibration absorber is semi-active, it requires low power to operate and is more economical to operate.
Status: Patent Pending
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