Reduction of longitudinal vibration by side-view arrangement of suspension

Kambe, Hiroki; Koumura, Shingo

doi:10.1080/00423110801935780

Cited by 10 publications

(7 citation statements)

References 2 publications

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“…This kind of suspension also has notable disadvantages, such as increased cost due to the large number of links and bearings, undesired deformation of the bearings resulting from possible kinematic overcorrection of the axle, greater sensitivity to wear of the link bearings and high requirements with regard to the observation of tolerances related to geometry and rigidity [1]. For the suspension with side-view tilt spring and damper present in [5], the stiffness and damping in the vertical and longitudinal directions are highly coupled. The improvement in vibration isolation in the longitudinal direction may sacrifice that in the vertical direction if the tilt angle is too large.…”

Section: Introductionmentioning

confidence: 99%

Ride quality evaluation of a vehicle with a planar suspension system

Zhu

Khajepour

Esmailzadeh

et al. 2012

Vehicle System Dynamics

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2012) Ride quality evaluation of a vehicle with a planar suspension system, Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility, 50:3, 395-413,The longitudinal connection between a chassis and a wheel in a conventional vehicle suspension system is commonly very stiff compared with the vertical connection. Such a mechanism can efficiently isolate vibrations and absorb shocks in the vertical direction but cannot sufficiently attenuate the impact in the longitudinal direction. In order to overcome such a limitation, a planar suspension system (PSS) with spring-damper struts in both the longitudinal and vertical directions is proposed so that the vibration along any direction in the wheel rotation plane can be isolated. In this paper, the dynamic responses of a vehicle with PSS due to a single bump and random road unevenness are investigated. The ride quality of the vehicle with PSS is evaluated in accordance with ISO 2631. A comparison with that of a similar conventional vehicle is conducted to demonstrate the promising potentials of the PSS in improving the vehicle ride quality.

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Section: Introductionmentioning

confidence: 99%

Ride quality evaluation of a vehicle with a planar suspension system

Zhu

Khajepour

Esmailzadeh

et al. 2012

Vehicle System Dynamics

View full text Add to dashboard Cite

show abstract

“…According to experimental data, the pitching motion is a role effect on the wheel speed sensor (4)(5) . Because of the complexity of the suspension geometry, the suspension deflecting motion in the vertical direction is considered in the calculation of horizontal forces (2,7) . Although the camber and toe angles of the wheel alignment have effects on the wheel speed, the effect values is very small (the values of slip rate and tyre radius were confirmed in tests and their variations…”

Section: Wheel Rolling Speed Variation Formulationsmentioning

confidence: 99%

“…were smaller than 0.01.). For the calculation of horizontal forces, the wheel load fluctuation caused by a tyre radius variation is utilized (3,7) . Therefore, in this paper, the wheel speed is assumed to vary with four inducing factors: body pitching, suspension deflecting, wheel load fluctuating, and driving torque simultaneously.…”

Section: Research Paper 20154070mentioning

confidence: 99%

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Body Attitude State Estimation Using Wheel Rolling Speed Variations

Liu

Hozumi

Morita

et al. 2015

IJAE

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The wheel speed sensor is comprised of two parts: rotary and fixed. Conventionally, the wheel speed sensor is mainly utilized to measure the vehicle velocity and acceleration. Because the rotary part and the fixed part are separate, the wheel speed varies with inducing factors, such as body pitching, suspension deflecting and wheel load fluctuating. Therefore, the wheel speed variation could be utilized to estimate vehicle attitude states. In this paper, correlations between the wheel speed variation and the inducing factors were formulated. The wheel speed could be described by a summation of four variations: body pitching, suspension deflecting, wheel load fluctuating, and driving torque. The summation correlation function was confirmed using actual vehicle tests. Based on the correlation function and a vehicle model, an estimation algorithm using a Kalman filter to calculate the body pitching velocity was proposed. In a test vehicle using the proposed algorithm, the estimation pitch velocity value and the measured value were in good agreement.

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“…The spring-damper element in an automobile suspension is conventionally configured in the vertical direction, although a small side-view tilt angle may exist between the vertical direction and the spring-damper strut axis [1]. The longitudinal linkages between a body and wheel axles, e.g.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of a vehicle with planar suspension system (PSS) under differential braking

Zhu

Khajepour

Esmailzadeh

2012

Vehicle System Dynamics

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To absorb the vibrations and shocks caused by road obstacles effectively in any direction within the wheel rotation plane, a planar suspension system (PSS), in which there are spring-damper struts in both the vertical and longitudinal directions, is proposed to improve the ride quality of a vehicle with such novel suspension systems. The longitudinal spring-damper strut in a PSS is considerably soft compared with the longitudinal connection in a conventional suspension. Consequently, the wheels in a vehicle with PSS can move forth and back with respect to the body. The dynamic behaviours of a PSS vehicle under some special conditions, such as a differential braking in which the braking torque applied to the wheels at two sides of an axle are uneven, may exhibit special characteristics. The directional stability of the PSS vehicle in such a case may be one of the major concerns. The dynamic performance of the PSS vehicle in the differential braking condition is thus necessary to be investigated. This paper presents the investigation results of the transient response of a vehicle with the PSS in such a case. The simulation results are also compared with those of a similar vehicle with conventional suspensions. The study demonstrates that the PSS vehicle is directionally stable in differential braking conditions. The dynamic behaviour of the PSS vehicle is generally comparable with that of a conventional vehicle.

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Reduction of longitudinal vibration by side-view arrangement of suspension

Cited by 10 publications

References 2 publications

Ride quality evaluation of a vehicle with a planar suspension system

Ride quality evaluation of a vehicle with a planar suspension system

Body Attitude State Estimation Using Wheel Rolling Speed Variations

Dynamic response of a vehicle with planar suspension system (PSS) under differential braking

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