公开(公告)号：AU6968596A

公开(公告)日：1997-03-27

申请号：AU6968596

申请日：1996-09-06

Applicant: APPLIED POWER INC

Inventor： BEARD ANDREW M ,  FLOTOW ANDREAS H VON

IPC: B60G17/015 ,  B60G17/0195 ,  B60G17/052 ,  B62D33/06 ,  F16F13/00 ,  F16F15/027

公开(公告)号：CA2228282A1

公开(公告)日：1997-03-13

申请号：CA2228282

申请日：1996-09-06

Applicant: APPLIED POWER INC

Inventor： BEARD ANDREW M ,  VON FLOTOW ANDREAS H

IPC: B60G17/015 ,  B60G17/0195 ,  B60G17/052 ,  B62D33/06 ,  F16F13/00 ,  F16F15/027

Abstract: An active vehicle suspension employs a multi-point support system between a vehicle's chassis and cab. Each support point has an isolator which includes a linear hydraulic actuator (52) that is connected at its quiet end to the payload by a passive vibration isolator (62) and is connected at its vibrating end to the chassis. Each isolator also has a support spring (68) to off-load the majority of the weight of the cab from the hydraulic actuator. An accelerometer (78) is mounted to sense movement at a point between the linear hydraulic actuator and the passive vibration isolator. An electrical signal produced by the accelerometer is processed to operate a hydraulic valve (26) that controls movements of the hydraulic actuator so that transmission of vibrations from the chassis to the cab is attenuated.

公开(公告)号：CA2146200A1

公开(公告)日：1995-10-05

申请号：CA2146200

申请日：1995-04-03

Applicant: APPLIED POWER INC

Inventor： SCHUBERT DALE W ,  BEARD ANDREW M ,  SHEDD STEVEN F ,  EARLES MARION R JR ,  VON FLOTOW ANDREAS H

IPC: E04B1/98 ,  F16F15/00 ,  F16F15/02 ,  G03F7/20 ,  G05D19/02 ,  H02N2/00

Abstract: An active vibration isolation system (10) includes a plurality of stiff actuators, such as piezoelectric motors (12a-c; 284, 350) which support a small mass (18) inside of a case (300). A passive isolator (20) is interposed between the small mass (18) and the payload mass (Mp). In the instance where the stiff actuators are piezoelectric motors, the sidewalls of the case (300) are used to provide compressive force along the variable length of each of the horizontal piezoelectric motor elements (284, 350) to prevent damage to same. Compensation circuitry (24) is connected between velocity sensors (17) and the stiff actuators to control the variable length thereof in this move-out-of-the-way system (10) and to compensate for resonating modes. Optionally, a payload mass velocity sensor (26) and associated circuitry may be used to provide additional control. Shear decouplers (282a-c; 352, 360) are used in conjunction with the piezoelectric motor elements (12a-c; 284, 350) to minimize the amount of shear force acting on the motor elements.