US 8,818,625 B2Granted

Damping apparatus for reducing vibrations

AssigneeShinko Electric Co., Ltd.

InventorsYasushi Muragishi, Hideaki Moriya, Yushi Sato, Takashi Fukunaga, Katsuyoshi Nakano, Hiroshi Nakagawa, Takayoshi Fujii, Takashi Onoue, Masaaki Narihisa

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Abstract

A damping apparatus for an automobile is provided, capable of ensuring a high level of reliability while obtaining excellent damping effect with simple configuration. The damping apparatus for an automobile that reduces vibrations of an automobile body may include an actuator that is attached to the automobile body and drives an auxiliary mass; a current detector that detects a current flowing through an armature of the actuator; a section that detects a terminal voltage applied to the actuator; a calculation circuit that calculates an induced voltage of the actuator, and further calculates at least one of the relative velocity, relative displacement, and relative acceleration of the actuator, based on a current detected by the current detector and the terminal voltage; and a control circuit that drive-controls the actuator based on at least one of the relative velocity, relative displacement, and relative acceleration of the actuator calculated by the calculation circuit.

Claims8

Dependent claims

A damping apparatus for use with a vibrating damping target in order to reduce vibrations of the vibrating damping target, the damping apparatus comprising:

an auxiliary mass member;
an actuator that has a stator structured to be fixed to the vibration damping target, a movable element, a spring element movably supporting the movable element, a shaft joining the movable element to the auxiliary mass member and being supported by the spring element, and stoppers that limits movable range of the movable element, the actuator vibrates the auxiliary mass member;
and
a control section that controls a current applied to the actuator in order to suppress the vibrations of the vibration damping target by using a reaction force of the auxiliary mass member when vibrating the auxiliary mass member with the actuator,
wherein the control section further includes an amplitude amount control section that performs control for setting an upper limit value of a current range that is applicable to the actuator, so that a vibration amplitude of the auxiliary mass member is limited in order to prevent the movable element from colliding with the stopper in a case of controlling the current applied to the actuator based on an amplitude command value and a frequency command value of vibrations to be generated, when a change amount in the frequency command value exceeds a predetermined value.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/443,430Filed 10 Apr 2012 · division
Priority: JP 2006-1290138 May 2006
Published: US 2012/0217108 A130 Aug 2012
Granted: 26 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F16F 7/1005
Using inertia effect: characterised by active control of the mass
B60G 17/018
The regulating means comprising electric or electronic elements: characterised by the use of a specific signal treatment or control method
F16F 15/002
Suppression of vibrations in systems ; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion: characterised by…
G05D 19/02
Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase: characterised by the use of electric means

Family

PCT/JP2007/059250Parent of this division · filed 27 Apr 2007
US 2012/0217108 A1Pre-grant publication · published 30 Aug 2012
Application12/300,006Parent of this division
US 8,401,735 B2Parent of this division
US 2010/0204881 A1Published application
US 8,818,625 B2This patent

From the US filing history. Foreign family members aren’t listed.