Hybrid Skyhook-Stability Augmentation System for Ride Quality Improvement of Railway Vehicle

2014 ◽  
Vol 663 ◽  
pp. 141-145
Author(s):  
Mohd Hanif Harun ◽  
W.Mohd Zailimi Wan Abdullah ◽  
Hishamuddin Jamaluddin ◽  
Roslan Abd Rahman ◽  
Khisbullah Hudha
Keyword(s):  
Degrees Of Freedom ◽  
Active Suspension ◽  
Sine Wave ◽  
Vehicle Body ◽  
Ride Quality ◽  
Railway Vehicle ◽  
Suspension Systems ◽  
Stability Augmentation ◽  
Ride Control

This paper is aimed to show the improvement of ride quality of railway vehicle with semi-active suspension systems. The dynamics of nine degrees-of-freedom (9-DOF) railway vehicle model is developed consists of a vehicle body, two bogies and four wheel-set. The disturbance considered is track irregularity which is modelled as a sine wave. The control algorithm for the semi-active suspension system is developed based on Stability Augmentation System (SAS) integrated with skyhook controller to reduce the effect of track disturbance. The performances of passive and semi-active suspension are compared by simulation using MATLAB-SIMULINK software. The results of the study show that the proposed controller is able to significantly improve ride quality of railway vehicle body. It is also noted that the additional ride control loop which is skyhook control is able to further improve the performance of SAS controller for the system.

scholarly journals Design of Novel BELBIC Controlled Semi-Active Suspension and Comparative Analysis with Passive and PID Controlled Suspension

2021 ◽  
Vol 18 (5) ◽  
Author(s):  
Pankaj SHARMA ◽  
Vinod KUMAR
Keyword(s):  
Human Body ◽  
Degrees Of Freedom ◽  
Active Suspension ◽  
Driver Model ◽  
Ride Quality ◽  
Body Parts ◽  
Hybrid Techniques ◽  
Design Engineers ◽  
Mass Displacement

Passenger comfort, quality of ride, and handling have broughta lot of attention and concern toautomotive design engineers. These 2 parameters must have optimum balance as they have an inverse effect on each other. Researchers have proposed several approaches and techniques like PID control, fuzzy approach, GA, techniques with inspiration from nature and hybrid techniques to attain the same. A new controller based on the learning behavior of the human brain has been used for the control of semi-active suspension in this study. The controller is known as the Brain Emotional Learning-Based Intelligent Controller (BELBIC). A one-fourth model of car along with the driver model having 6 degrees of freedom (DOF) wasmodeled and simulated. The objective of the studywasto analyze the performance of the proposed controller for improving the dynamic response of the vehicle model coupled with complex biodynamic models of the human body as a passenger, making the whole dynamic system very complex to control. The performance wasanalyzed based on percentage reduction in the overshoot of the vehicle’s sprung mass as well as different human body parts when subjected to road disturbances. The proposed controller performance wascompared with the PID controller, widely used in semi-active suspension. The simulation results obtained for BELBIC controlled system for circular road bump showed that the overshoot of passenger head and body wasreduced by 18.84 and 18.82 %, respectively and reduction for buttock and leg displacement was18.87 %. The vehicle’s seat and sprung mass displacement displayedan improvement of 18.90 and 18.51 %. The overshoot of passenger's head and body displacement wasimproved by 19.79and 19.62 %,respectively, whereas improvement for buttock & leg, vehicle’s seat, and sprung mass displacement were19.81, 20.00, and 20.49 % against trapezoidal speed bump. The PID controlled suspension disclosed an improvement of 8.74, 8.53, 8.75, 11.11, 14.75 % against circular bump and 10.72, 10.33, 10.73, 11.11 and 11.75 % against trapezoidal bump for overshoot reduction of passenger head, body, buttock & leg, vehicle’s seat and sprung mass displacement, respectively. The proposed BELBIC controlled semi-active suspension outperformed the widely used PID controlled semi-active suspension and indicated asignificant improvement in the ride quality of the vehicle.

Design and Analysis of Magnetorheological Dampers for Train Suspension

2005 ◽  
Vol 219 (4) ◽  
pp. 261-276 ◽  
Author(s):  
Y K Lau ◽  
W H Liao
Keyword(s):  
Mr Damper ◽  
Suspension System ◽  
Ride Quality ◽  
Railway Vehicle ◽  
Suspension Systems ◽  
Mr Dampers ◽  
Fluid Damper ◽  
Secondary Suspension ◽  
Mr Fluid Damper

This article aims at designing a magnetorheological (MR) fluid damper that is suitable for a semi-active train suspension system in order to improve its ride quality. A double-ended MR damper is designed, fabricated, and tested. Simulation is carried out by integrating the MR damper model in the secondary suspension of a full-scale railway vehicle model. The feasibility and effectiveness of the semi-active train suspension system with the developed MR dampers are investigated by comparing the controlled performances of the MR suspension system with different passive suspension systems. The results show that the semi-active suspension with the developed MR dampers can substantially improve the ride quality of the passengers.

Adaptive Ride Control In Active Suspension Systems

1995 ◽  
Vol 24 (3) ◽  
pp. 197-230 ◽  
Author(s):  
A.J. TRUSCOTT ◽  
P.E. WELLSTEAD
Keyword(s):  
Active Suspension ◽  
Suspension Systems ◽  
Active Suspension Systems ◽  
Ride Control

Simulation of Electrical Actuator and Air Spring Actuator Controlled Suspension Systems for Automotive Vehicles

2015 ◽  
Vol 7 (3) ◽  
Author(s):  
P. Sathishkumar ◽  
J. Jancirani ◽  
D. John ◽  
B. Arun
Keyword(s):  
Degrees Of Freedom ◽  
Fuzzy Controller ◽  
Vehicle Body ◽  
Air Spring ◽  
Electric Actuator ◽  
Quarter Car Model ◽  
Suspension Systems ◽  
Electrical Actuator ◽  
System Body ◽  
Three Degrees Of Freedom

This article discusses methods to reduce the acceleration of a vehicle and increase its road holding ability. In the simulation using quarter car model, electric actuator and air spring based actuator are used as the main control elements. A three degrees of freedom system model is used in which the parameters for the tire, vehicle body and seat are considered. The required actuator force is calculated by a standard fuzzy controller. For analysing the performance of active suspension system, body acceleration and velocity are given as inputs to the controller according to ISO specified standards. Accelerations of the seat and vehicle body are used to judge the performance of the system.

Guideway Camber and Three-Stage Passive Suspension for Improved Tracked Air Cushion Vehicle Ride Quality: Part II of a Parametric Study

1973 ◽  
Vol 95 (1) ◽  
pp. 86-91
Author(s):  
S. B. Biggers
Keyword(s):  
High Speed ◽  
Ride Quality ◽  
Attractive Alternative ◽  
High Quality ◽  
Passive Suspension ◽  
Suspension Systems ◽  
Active Suspension Systems ◽  
Air Cushion ◽  
Passive Suspension System

Two means of providing a high quality air cushion ride at high speed using simple passive suspension systems are investigated. The inclusion of the proper amount of camber in guideway beams is shown to greatly reduce both low and high speed heave accelerations. A three-stage passively suspended vehicle including two degrees of pitching motion is shown to eliminate the high speed peak in accelerations present with two-stage vehicles. The effects of secondary and tertiary damping, of the vehicle to span length ratio, and of guideway camber on the ride quality of this vehicle are investigated. Coupled with cambered guideway beams, the three-stage passive suspension system appears to be an attractive alternative to active suspension systems.

Two-Dimensional Dynamics of Tracked Ram Air Cushion Vehicles With Fixed and Variable Winglets

1979 ◽  
Vol 101 (4) ◽  
pp. 321-331
Author(s):  
L. M. Sweet ◽  
H. C. Curtiss ◽  
R. A. Luhrs
Keyword(s):  
Active Suspension ◽  
Suspension System ◽  
Ride Quality ◽  
Vertical Acceleration ◽  
Suspension Systems ◽  
Active Suspension Systems ◽  
Air Cushion ◽  
Linearized Model ◽  
The One ◽  
Air Cushion Vehicles

A linearized model of the pitch-heave dynamics of a Tracked Ram Air Cushion Vehicle is presented. This model is based on aerodynamic theory which has been verified by wind tunnel and towed model experiments. The vehicle is assumed to be equipped with two controls which can be configured to provide various suspension system characteristics. The ride quality and dynamic motions of the fixed winglet vehicle moving at 330 km/hr over a guideway described by roughness characteristics typical of highways is examined in terms of the rms values of the vertical acceleration in the foremost and rearmost seats in the passenger cabin and the gap variations at the leading and trailing edges of the vehicle. The improvement in ride quality and dynamic behavior which can be obtained by passive and active suspension systems is examined and discussed. Optimal regulator theory is employed to design the active suspension system. The predicted rms values of the vertical acceleration in the one-third octave frequency bands are compared with the vertical ISO Specifications. It is shown that marked improvements in the ride quality can be obtained with either the passive or active suspension systems.

scholarly journals Modified Electromagnetic Actuator for Active Suspension System

2021 ◽  
Vol 11 (4) ◽  
Author(s):  
Prajwal V R ◽  
Chandrashekar Murthy B N ◽  
Yashwanth S D
Keyword(s):  
Active Suspension ◽  
Ride Quality ◽  
Electromagnetic Actuation ◽  
Electromagnetic Actuators ◽  
Magnetic Damping ◽  
The Road ◽  
Suspension Systems ◽  
Working Principle ◽  
Vehicle Chassis ◽  
Design Construction

Active suspension is a type of suspension systems which can vary its damping value in order to adjust the spring firmness in accordance with the road conditions. Real Active Suspension incorporates an external actuator which helps in raising or lowering of vehicle chassis independently at each wheel. Generally, the actuators that are used for active suspension are Hydropneumatic, Electro-hydraulic or Electromagnetic actuators. A new concept of two-way electromagnetic actuation with the help of magnetic damping is proposed in this paper, which can extend its arm on both sides to facilitate active suspension mechanism in both humps and potholes. This increases the ride quality while maneuvering not only in humps, but also in dumps. It also describes about the comparison of spring materials, sophisticated design, construction and working principle of newly proposed actuator. Catia V5 software has been used to design and simulate the actuator model, different spring materials are analyzed and their shear stress and deflections are compared.

scholarly journals Performance Comparison of Various controllers on Semi-Active Vehicle Suspension System

2021 ◽  
Vol 40 ◽  
pp. 01001
Author(s):  
Sarvesh Walavalkar ◽  
Viraj Tandel ◽  
Rahul Sunil Thakur ◽  
V.V Pramod Kumar ◽  
Supriya Bhuran
Keyword(s):  
Active Suspension ◽  
Suspension System ◽  
Internal Model Control ◽  
Vehicle Body ◽  
Vehicle Suspension ◽  
Inference System ◽  
Proportional Integral ◽  
Suspension Systems ◽  
Model Control ◽  
Vehicle Suspension System

The value of a self-tuning adaptive semi-active control scheme for automotive suspension systems is discussed in this paper. The current vehicle suspension system uses fixed-coeffcient springs and dampers. The ability of vehicle suspension systems to provide good road handling and improve passenger comfort is usually valued. Passive suspension allows you to choose between these two options. Semi-Active suspension(SAS), on the other hand, can provide both road handling and comfort by manipulating the suspension force actuators directly. The semi-active suspension system for a quarter car model is compared to passive and various controllers such as Proportional-Integral, Proportional-Integral-Derivative, Internal model control (IMC)-PID, IMC-PID with filter, FUZZY, and Adaptive-network-based fuzzy inference system(ANFIS) in this analysis. This research could be relevant in the future for designing better car suspension adjustments to eliminate vertical jerks and rolling motion experienced by the vehicle body on bumps and humps.

The improvement of ride quality of tractor using semi-active suspension

2002 ◽  
Vol 2002.77 (0) ◽  
pp. _12-27_-_12-28_
Author(s):  
Takayuki KOIZUMI ◽  
Nobutaka TSUJIUCHI ◽  
Yoshifumi NABESHIMA ◽  
Tomoyuki JINDE ◽  
Eiichi ISHIDA
Keyword(s):  
Active Suspension ◽  
Ride Quality

A Ray-Tracing Approach to Simulation and Evaluation of a Real-Time Quarter Car Model With Semi-Active Suspension System Using Matlab

2003 ◽  
Author(s):  
Brendan J. Chan ◽  
Corina Sandu
Keyword(s):  
Real Time ◽  
Electrical Power ◽  
Active Suspension ◽  
Critical Systems ◽  
Quarter Car Model ◽  
Suspension Systems ◽  
Active Suspension Systems ◽  
Control Scheme ◽  
Ride Control ◽  
Simulation And Evaluation

With the advent of X-by-wire systems, more research has been done in the field of semi-active suspension systems. These systems are not only lighter and less complicated than active suspension systems but also consume less power for operation. Power economy is crucial in an X-by-wire system because all of the safety critical systems run on electrical power in an X-by-wire vehicle. In this study, a comparison will be done on the performance of a real-time non-linear semi-active control scheme versus a passive suspension scheme. This comparison is done by using Matlab graphic visualization and Simulink to generate a graphic model of both simulations and observing the performance of both systems in real time. A mathematical model is created in Simulink and the response, given a certain excitation is output into a graphic object to view the Real-Time response. The main purpose of this study is to provide a method for ride control system engineers to evaluate their design and better visualize the performance of the designed system.

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