Volume-constrained optimization of magnetorheological and electrorheological valves and dampers

This paper presents a case study of magnetorheological (MR) and electrorheological (ER) valve design within a constrained cylindrical volume. The primary purpose of this study is to establish general design guidelines for volume-constrained MR valves. Additionally, this study compares the performance of volume-constrained MR valves against similarly constrained ER valves. Starting from basic design guidelines for an MR valve, a method for constructing candidate volume-constrained valve geometries is presented. A magnetic FEM program is then used to evaluate the magnetic properties of the candidate valves. An optimized MR valve is chosen by evaluating non-dimensional parameters describing the candidate valves' damping performance. A derivation of the non-dimensional damping coefficient for valves with both active and passive volumes is presented to allow comparison of valves with differing proportions of active and passive volumes. The performance of the optimized MR valve is then compared to that of a geometrically similar ER valve using both analytical and numerical techniques. An analytical equation relating the damping performances of geometrically similar MR and ER valves in as a function of fluid yield stresses and relative active fluid volume, and numerical calculations are provided to calculate each valve's damping performance and to validate the analytical calculations.

[1]  J. D. Carlson,et al.  COMMERCIAL MAGNETO-RHEOLOGICAL FLUID DEVICES , 1996 .

[2]  Norman M. Wereley,et al.  Analysis and testing of Bingham plastic behavior in semi-active electrorheological fluid dampers , 1996 .

[3]  J. L. Sproston,et al.  Applications of electro-rheological fluids in vibration control: a survey , 1996 .

[4]  Hartmut Janocha,et al.  Design rules for MR fluid actuators in different working modes , 1997, Smart Structures.

[5]  N. Wereley,et al.  Nondimensional analysis of semi-active electrorheological and magnetorheological dampers using approximate parallel plate models , 1998 .

[6]  Shirley J. Dyke,et al.  An experimental study of MR dampers for seismic protection , 1998 .

[7]  Henri P. Gavin,et al.  Design method for high-force electrorheological dampers , 1998 .

[8]  Seung-Bok Choi,et al.  Comparison of Field-Controlled Characteristics between ER and MR Clutches , 1999 .

[9]  Norman M. Wereley,et al.  Characterization of Magnetorheological Helicopter Lag Dampers , 1999 .

[10]  Faramarz Gordaninejad,et al.  Fail-Safe Magneto-Rheological Fluid Dampers for Off-Highway, High-Payload Vehicles , 2000 .

[11]  Yongsheng Zhao,et al.  Semi-Active Damping of Ground Resonance in Helicopters Using Magnetorheological Dampers , 2001 .

[12]  Henri P. Gavin,et al.  Annular Poiseuille flow of electrorheological and magnetorheological materials , 2001 .

[13]  Farhan Gandhi,et al.  Magnetorheological fluid damper feedback linearization control for helicopter rotor application , 2001 .

[14]  Seung-Bok Choi,et al.  ER suspension units for vibration control of a tracked vehicle , 2001, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[15]  Norman M. Wereley,et al.  Comparative Analysis of the Time Response of Electrorheological and Magnetorheological Dampers Using Nondimensional Parameters , 2002 .

[16]  Norman M. Wereley,et al.  Seismic Control of Civil Structures Utilizing Semi–Active MR Braces , 2003 .

[17]  Norman M. Wereley,et al.  Semi-Active Vibration Isolation Using Magnetorheological Isolators , 2005 .