Semi-active control of tracked vehicle suspension incorporating magnetorheological dampers

Ata, W. G.; Salem, A. M.

doi:10.1080/00423114.2016.1273531

Cited by 47 publications

(32 citation statements)

References 19 publications

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“…In active control systems, errors cause unwanted forces acting on the car body or/and bogie frames, which may cause a series of disastrous consequences [5,6]. Unlike active control, semiactive control adjusts only the damping coefficient of dampers to adapt to the new need.…”

Section: Challenges Associated With High-speed Railway Vehiclementioning

confidence: 99%

Semiactive Control of High‐Speed Railway Vehicle Suspension Systems with Magnetorheological Dampers

Liao

Liu

Yang

2019

Shock and Vibration

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Using the magnetorheological (MR) damper model, this paper derives a semiactive suspension model for a high-speed railway vehicle, and a new evaluating method is proposed to analyze the effect of two kinds of time delay existing in control systems on vehicle dynamic performance. The railway vehicle is modeled by a 50 degree-of-freedom (DOF) system which considers the full 6 DOF of each wheelset, bogie, car body, and the pitch angle of each axle box. Several control strategies, sky-hook (SH), acceleration-driven damping (ADD), and mixed SH-ADD, are considered in the semiactive suspension system. To evaluate the effect of these semiactive controls and the different kinds of time delay on the lateral ride index of a high-speed railway vehicle, a 3D surface in a rectangular coordinate system is described. The cross curve between the 3D surface and a horizontal plane which represents the performance of passive suspension is projected on the X-Y plane, and the area enclosed by the contour line, X-axis, and Y-axis can be used to evaluate the performance of semiactive controls. The results show that the new method is convenient to evaluate the performance of semiactive control strategies visually when there is more than one kind of time delay.

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Section: Challenges Associated With High-speed Railway Vehiclementioning

confidence: 99%

Semiactive Control of High‐Speed Railway Vehicle Suspension Systems with Magnetorheological Dampers

Liao

Liu

Yang

2019

Shock and Vibration

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“…Ride comfort and road handling have usually been considered the most important factors in evaluating suspension performance. Ride comfort is proportional to the absolute acceleration of the vehicle body, while road handling is linked to the relative displacement between the vehicle body and the tires [1][2][3]. Most automobile suspension systems consist of a damper, a spring and a set of linkages.…”

Section: Introductionmentioning

confidence: 99%

“…In the last few decades, with the advent of sophisticated electronics, the performance of the suspension has drastically enhanced beyond the traditional capabilities of a passive suspension system [3][4][5]. Passive systems are limited in performance to compromise between the two properties [6].…”

Section: Introductionmentioning

confidence: 99%

Adjustable Valve Semi-Active Suspension System for Passenger Car

Ahmed¹,

Yusoff²,

M.³

2019

IJAME

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The suspension of the car plays a very important role in the safety and the comfort of the vehicle and for absorbing the shock waves and give comfort for the driver and passenger. This paper improves the performance of an automobile suspension system by developing electronically adjustable semi-active shock absorber. This achieved by attaching stepper motor for each shock absorber which helps in adjusting the bleed orifice to a certain position that alternates the hydraulic oil flow in the shock absorber between piston’s chamber during the process of compression and rebound. To evaluate the effect of developed semi-active shock absorber on the dynamic behaviour of the vehicle, several tests were carried out on different types of road condition (bumpy, straight-line and roundabout). These tests were used to evaluate the acceleration and ride quality. There is a great range in response when the bleed orifice is opened reached up to 35% between the stiff and soft setting. The value of root means square acceleration (RMS) was calculated and compared with the standard of human exposure to whole-body vibration, which shows an error of 6% slightly. The result shows the effect of electronically controllable shock absorber on a vehicle’s dynamic behaviour — the advantage of electronics to improve the performance of ride comfort and reduced the harms due to undesired vibration.

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“…The controllable damper is the key component of semi-active suspensions for a variety of vehicles [8,9]. Generally speaking, the existing controllable dampers include three types: the MR (magneto-rheological) damper [10], the ER (electro-rheological) damper [11], and the controllable hydraulic damper [12]. The damping force of the MR damper can be adjusted and is easy to control.…”

Section: Introductionmentioning

confidence: 99%

A Hydraulic Semi-Active Suspension Based on Road Statistical Properties and Its Road Identification

Zhao

Zhou

et al. 2018

Applied Sciences

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Featured Application: This work is specifically applied to vehicle suspensions.Abstract: The existing semi-active suspensions are very expensive and difficult to be popularized. Therefore, the search for the low-cost semi-active suspension has become a hotspot. To reduce the product cost of semi-active suspensions, this study proposed a new hydraulic semi-active suspension system based on road statistical properties and creates an identification method of road conditions. Firstly, the working process of the proposed semi-active suspension was given. Then, the formula for calculating the mean square value of the body acceleration under the running road condition was derived. Based on the formula, the road identification method was created. Finally, the road test was carried out using a test vehicle. The identified road PSD (power spectral density) values are all consistent with the real values. The test results show that the road identification method can effectively perceive the actual road grades. The identification interval with 20 s can meet the requirements of practical applications. The slight fluctuation of the running speed v has little effect on the identification results because of the statistical characteristics of road conditions.

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Semi-active control of tracked vehicle suspension incorporating magnetorheological dampers

Cited by 47 publications

References 19 publications

Semiactive Control of High‐Speed Railway Vehicle Suspension Systems with Magnetorheological Dampers

Semiactive Control of High‐Speed Railway Vehicle Suspension Systems with Magnetorheological Dampers

Adjustable Valve Semi-Active Suspension System for Passenger Car

A Hydraulic Semi-Active Suspension Based on Road Statistical Properties and Its Road Identification

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