MASS-SPRING SYSTEM AND ITS CONTROL METHOD

Japanese Patent JP3841450

B2

PURPOSE: To provide an improved active resonant force generator capable of reducing vibrations caused by external disturbance and accommodating variations in the external disturbance frequency.
CONSTITUTION: A force generator 20 is adapted to be attached to a structure 21 and includes a mass 23 mounted for movement relative to the structure and a plurality of springs 22, 24 operatively arranged between the mass 23 and the structure 21. A servoactuator 26 is arranged to controllably excite a mass-spring system. The actual force Fa transmitted from the mass to the structure is compared with a commanded force Fc to produce a force error signal Fe. The actuator is caused to produce a velocity as a function of the error signal. The gain of a closed force loop is selected so that the resonance of the mass-spring system has an effective damping ratio ζ of about 0.5 or more, and preferably about 0.7. The mass-spring system is not substantially resonated by vibrations of the structure near its resonant frequency ωn.

WO/2010/140933	ROTOR DAMPER AND TAIL ROTOR WITH SUCH A ROTOR DAMPER
JPH085437	INDUSTRIAL APPLICABILITY: Articulated hub structure for rotary wing aircraft

Kenneth Dee. Ghan Jost
Christopher A. Lauk
Gonzalo Jay Ray

JP8487794A

November 01, 2006

April 22, 1994

Click for automatic bibliography generation  

Moog Incorporated

B64C27/51; B60G17/018; F16F15/02; B64C27/00; F16F7/10; F16F15/03; G05D19/02; (IPC1-7): F16F15/02; G05D19/02; //B64C27/51

JP4155076A
JP5965638A
JP58221038A
JP63221410A
JP351550A

Hideto Asamura
Hajime Asamura
Toru Mori
Yukio Iwamoto

Previous Patent: ANTI-DEPRESSANT AND ANTI-PARKINSON'S DISEASE COMPOUNDS

Next Patent: RESERVE TANK AND MANUFACTURE THEREOF