DESIGN METHOD OF MAGNETORHEOLOGICAL FLUID SHOCK ABSORBER FOR CAR SUSPENSION

2008 ◽  
Vol 21 (05) ◽  
pp. 19
Author(s):  
Changrong LIAO
Keyword(s):  
Shock Absorber ◽  
Design Method ◽  
Magnetorheological Fluid ◽  
Car Suspension

Adaptive Control of the Shock Absorber with Magnetorheological Fluid in the Car Suspension

2021 ◽  
pp. 3-12
Author(s):  
S.P. Kruglov ◽  
I.A. Zakovyrin
Keyword(s):  
Control Algorithm ◽  
Shock Absorber ◽  
Reference Model ◽  
Low Frequency ◽  
Parametric Identification ◽  
Magnetorheological Fluid ◽  
Vehicle Body ◽  
Mass Model ◽  
Car Suspension ◽  
Suspension Control

The disadvantages of car suspension control systems include their inability to function with uncertainty of the suspension parameters and external disturbances, as well as the impossibility of quickly countering the latter. A new suspension control algorithm is proposed, which is able to reduce the impacts on the vehicle body from the road as well as inertial forces under the uncertainty of these parameters. The algorithm is adaptive and is based on the parametric identification of the mathematical model of the controlled object, performed by the control system in real time, and also on the use of an implicit reference model. A shock absorber with a magnetorheological fluid acts as a controlled element, which is capable of changing the degree of suspension damping. On the example of a two-mass model of the "quarter car" suspension, a model study of the effectiveness of the developed algorithm in comparison with a passive suspension was carried out. The results of the study showed the ability of the proposed adaptive suspension control algorithm to function under the current a priori uncertainty, improving the properties of the suspension in the low frequency range, which is most important for ensuring comfortable conditions for the driver and passengers.

5424 Modeling of Shock Absorber Using Magnetorheological Fluid

2006 ◽  
Vol 2006.4 (0) ◽  
pp. 353-354
Author(s):  
Masaharu KOBAYASHI ◽  
Fenghui SHI ◽  
Ken'ichi MAEMORI
Keyword(s):  
Shock Absorber ◽  
Magnetorheological Fluid

Design of a Reconfigurable Dynamic Testbed for Co-Design Method Validation

2017 ◽  
Author(s):  
Anand P. Deshmukh ◽  
Danny J. Lohan ◽  
James T. Allison
Keyword(s):  
Control System ◽  
Design Method ◽  
Design Methods ◽  
System Architectures ◽  
Car Suspension ◽  
Kinematic Behavior ◽  
Wide Range ◽  
Physical Testing ◽  
Dynamic Testbed ◽  
And Control

Physical testing as a technique for validation of engineering design methods can be a valuable source of insights not available through simulation alone. Physical testing also helps to ensure that design methods are suitable for design problems with a practical level of detail, and can reveal issues related to interactions not captured by physics-based computer models. Construction of physical and testing of physical prototypes, however, is costly and time consuming so it is not often used when investigating new design methods for complex systems. This gap is addressed through an innovative testbed presented here that can be reconfigured to achieve a range of different prototype design properties, including kinematic behavior and different control system architectures. Thus, a single testbed can be used for validation of numerous design geometries and control system architectures. The testbed presented here is a mechanically and electronically reconfigurable quarter-car suspension testbed with nonlinear elements that is capable of testing a wide range of both optimal and sub-optimal design prototypes using a single piece of equipment. Kinematic suspension properties can be changed in an automated way to reflect different suspension linkage designs, spring and damper properties can be adjusted in real time, and control system design can be changed easily through streamlined software modifications. While the specific case study is focused on development of a reconfigurable system for validation of co-design methods, the concept extends to physical validation using reconfigurable systems for other classes of design methods.

Matching Analysis on Main Parameter for the Shock Absorber Development Process

2013 ◽  
Vol 694-697 ◽  
pp. 393-398 ◽  
Author(s):  
Gang Liu ◽  
Si Zhong Chen ◽  
Hong Bin Ren
Keyword(s):  
Shock Absorber ◽  
Piecewise Linear ◽  
Nonlinear Damping ◽  
Control Mode ◽  
Nonlinear Dynamic Model ◽  
Nonlinear Characteristics ◽  
Car Suspension ◽  
Numerical Simulation Methods ◽  
Road Excitation ◽  
Vehicle Suspension System

Considering nonlinear characteristics of springiness and damping element, the quarter-car suspension nonlinear dynamic model is established with ADAMS. The simulation model of suspension established, and the simulation curve of nonlinear suspension is gotten by using the numerical simulation methods. The target parameters of the piecewise linear three stage control mode of the shock absorber are studied under the different random road excitation, it would provide the theoretical basic for the nonlinear damping matching of the vehicle suspension system.

scholarly journals Optimization for a Semi-Active Shock Absorber Using Magnetorheological Fluid

2005 ◽  
Vol 71 (708) ◽  
pp. 2492-2500 ◽  
Author(s):  
Fenghui SHI ◽  
Yoshiharu TOMOMORI ◽  
Naoki TANIGAWA ◽  
Reiko KOGANEI ◽  
Ken'ichi MAEMORI
Keyword(s):  
Shock Absorber ◽  
Magnetorheological Fluid

Experimental Study on the Dynamic Characteristics of Hydro-Magneto-Electric-Regenerative Shock Absorber

2016 ◽  
Vol 836 ◽  
pp. 9-13
Author(s):  
Harus Laksana Guntur ◽  
Wiwiek Hendrowati
Keyword(s):  
Experimental Study ◽  
Dynamic Characteristics ◽  
Hydraulic System ◽  
Shock Absorber ◽  
Excitation Frequency ◽  
Vehicle Suspension ◽  
Test Rig ◽  
Electric Generator ◽  
Car Suspension ◽  
Regenerative Shock Absorber

Regenerative shock absorber is designed to convert the vibration energy losses from the vehicle suspension into electricity. This paper presents an experimental study on the dynamic characteristics of hydro-magneto-electric-regenerative shock absorber (HMERSA). Study was carried out by developing a prototype of HMERSA and testing its dynamic characteristics. The results were analyzed and discussed. Prototype of the HMERSA consists of hydraulic system and electric generator. The HMERSA was tested using a quarter car suspension test rig with input displacement in various frequency (1.3Hz, 1.5Hz, 1.7Hz) and for HMERSA’s various oil viscousity (ISO VG 10, 32, 46). Sprung mass acceleration and the generated electric power representing the dynamic characteristics of HMERSA were measured. Maximum power 2.5 watt and root mean square acceleration 0.172 m/s2 gained for HMERSA with oil viscousity ISO VG 10 at all excitation frequency.

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