Optimal control of structural vibrations using a mixed-mode magnetorheological fluid mount

In this work, a mixed-mode magnetorheological (MR) mount is proposed and applied to the vibration control of a flexible beam structure subjected to external disturbances. On the basis of non-dimensional Bingham number, an appropriate size of the MR mount is designed and manufactured. After experimentally evaluating the field-dependent damping force of the MR mount, a structural system consisting of a flexible beam and vibrating rigid mass is established. The governing equation of motion of the system is derived and expressed as a state space control model. A linear quadratic Gaussian (LQG) controller is then designed in order to attenuate the vibration of the structural system. The controller is empirically realized and control responses such as acceleration and displacement of the structural system are evaluated and presented in frequency domain.

[1]  Eugene Rivin,et al.  Passive Engine Mounts-Some Directions for Further Development , 1985 .

[2]  Nicos Makris,et al.  Electrorheological damper with annular ducts for seismic protection applications , 1996 .

[3]  Young-Pil Park,et al.  H8 Control Performance of a Full-Vehicle Suspension Featuring Magnetorheological Dampers , 2002 .

[4]  Seung-Bok Choi,et al.  Performance Evaluation of a Mixed Mode ER Engine Mount Via Hardware-in-the-Loop Simulation , 1999 .

[5]  Seung-Bok Choi,et al.  Vibration control of a flexible structure using a hybrid mount , 2004 .

[6]  Seung-Bok Choi,et al.  Comparison of damping force models for an electrorheological fluid damper , 2003 .

[7]  Maciejowsk.  Multivariable Feedback Design , 1989 .

[8]  Sung-Ryong Hong,et al.  Vibration Control of a Structural System Using Magneto-Rheological Fluid Mount , 2005 .

[9]  Kazuya Takano,et al.  High Performance Hydraulic Mount for Improving Vehicle Noise and Vibration , 1988 .

[10]  Billie F. Spencer,et al.  Large-scale MR fluid dampers: modeling and dynamic performance considerations , 2002 .

[11]  Dean Karnopp,et al.  Design Principles for Vibration Control Systems Using Semi-Active Dampers , 1990 .

[12]  Seung-Bok Choi.  Vibration Control of a Flexible Structure Using ER Dampers , 1999 .

[13]  Kon Well Wang,et al.  Structural Vibration Control Via Electrorheological-Fluid-Based Actuators With Adaptive Viscous And Frictional Damping , 1994 .

[14]  K. Y. Lam,et al.  DESIGN OPTIMIZATION OF MARINE ENGINE-MOUNT SYSTEM , 2000 .

[15]  Henry Wu,et al.  Optimization of aircraft engine suspension systems , 1991 .

[16]  Seung-Bok Choi,et al.  Vibration control of a frame structure using electro-rheological fluid mounts , 2002 .

[17]  Leonard Meirovitch,et al.  Dynamics And Control Of Structures , 1990 .

[18]  S. Rigby,et al.  Electrorheological fluids applied to an automotive engine mount , 1993 .

[19]  Seung-Bok Choi.  Performance comparison of vehicle suspensions featuring two different electrorheological shock absorbers , 2003 .

[20]  Takayoshi Kamada,et al.  Active vibration control of frame structures with smart structures using piezoelectric actuators (Vibration control by control of bending moments of columns) , 1997 .

[21]  Rajendra Singh,et al.  Nonlinear Analysis of Automotive Hydraulic Engine Mount , 1993 .

[22]  Y. Kikushima,et al.  Optimal Design of Active Vibration Isolation System , 1988 .