A5040990122- Vibration Control and Rheological Fluids
- Hydraulic and Pneumatic Systems
- Railway Engineering and Dynamics
- Seismic Performance and Analysis
- Elevator Systems and Control
- High-Velocity Impact and Material Behavior
- Advanced Fiber Optic Sensors
- Material Properties and Failure Mechanisms
- Structural Engineering and Vibration Analysis
- Fluid Dynamics and Vibration Analysis
- Structural Health Monitoring Techniques
- Geotechnical and Geomechanical Engineering
Chinese University of Hong Kong
2001-2009
Chongqing University
2005-2006
This paper is aimed to show the feasibility for improving ride quality of railway vehicles with semiactive secondary suspension systems using magnetorheological (MR) dampers. A nine degree-of-freedom vehicle model, which includes a car body, two trucks and four wheelsets, proposed cope vertical, pitch roll motions body trucks. The governing equations integrated MR dampers are developed. To illustrate effectiveness controlled on systems, LQG control law acceleration feedback adopted as system...
In this paper, it is aimed to investigate semi-active suspension systems using magnetorheological (MR) fluid dampers for improving the ride quality of railway vehicles. A 17-degree-of-freedom (DOF) model a full-scale vehicle integrated with controlled MR in its secondary system proposed cope lateral, yaw, and roll motions car body, trucks, wheelsets. The governing equations combining dynamics rail track irregularities are developed linear quadratic Gaussian (LQG) control law acceleration...
In this paper, the semi-active suspension system for railway vehicles based on controlled (MR) fluid dampers is investigated, and compared with passive off systems. The lateral, yaw, roll accelerations of car body, trucks, wheelsets a full-scale vehicle integrated four MR in secondary systems, which are closed open loops respectively, simulated under random periodical track irregularities using established governing equations modelled Part I paper. simulation results indicate that (1)...
In this article, an MR valve possessing simultaneously annular fluid flow resistance channels and radial is designed, its structure working principle are described. addition, a mathematical model for the with both paths developed simulation carried out to evaluate newly valve. The results based on proposed indicate that efficiency of circular disk-type superior under same magnetic flux density outer radius Furthermore, also show can be improved significantly two types gaps, viz. gaps simultaneously.
It is challenging to control the damping forces of magnetorheological (MR) fluid dampers because strong nonlinearity between force an MR damper and velocity across damper, semiactive relationship applied voltage/current. Hence, desired ought be generated by cannot commanded directly, only command voltage current driver for can directly controlled. In this article, configuration a system with discussed controller based on signum function proposed. The used generate adjust track determined...
For cable-stayed bridges, cable tension and its variation are two of the most important factors for judging whether bridges functional or not. Therefore, in-situ monitoring stayed cables’ bridge is very necessary, from which we can determine health bridge. However, how to acquire retrieve signal key problem method suitable bridges. In this paper, polyvinylidene fluoride (PVDF) piezoelectric films used as sensors dynamic responses cables, cables be determined. Signal retrieval PVDF film via...