Investigation into untripped rollover of light vehicles in the modified fishhook and the sine maneuvers. Part I: Vehicle modelling, roll and yaw instability

Zhang, Nong; Dong, Guohai; Du, Haiping

doi:10.1080/00423110701344752

Cited by 51 publications

(24 citation statements)

References 6 publications

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“…The output variables are the longitudinal and lateral tyre forces and the self-aligning moment at the tyre contact patch. The interested reader is referred to Zhang et al [15], where an application of the MF tyre model is described in greater detail.…”

Section: Tyre Modelmentioning

confidence: 99%

“…The roll moment for this vehicle model is calculated using M x =Ḣ x − rH y , as outlined in [15]. H refers to the angular momentum about the given axis (see Figure 1).…”

Section: Vehicle Modelmentioning

confidence: 99%

“…The equations of motion of the nine-DOF vehicle model were derived by Zhang et al [15]. The state variable vector for this model consists of 18 variables:…”

Section: Vehicle Modelmentioning

confidence: 99%

“…Typical passenger car parameters, obtained mostly from [15] and outlined in Table 1, are employed. The vehicle consists of a rigid sprung mass (vehicle body), a conventional independent suspension and four unsprung masses (wheel assemblies).…”

Section: Vehicle Modelmentioning

confidence: 99%

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Hydraulically interconnected vehicle suspension: handling performance

Smith

Zhang

2011

Vehicle System Dynamics

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This paper extends recent research on vehicles with hydraulically interconnected suspension (HIS) systems. Such suspension schemes have received considerable attention in the research community over the last few years. This is due, in part, to their reported ability to provide stiffness and damping rates dependent on the suspension mode of operation (i.e. the bounce, roll, pitch or articulation of the unsprung masses relative to the sprung mass), rather than relying on the stiffness and damping characteristics of the single wheel stations. The paper uses a nine-degrees-of-freedom (DOF) vehicle model and simulations of a fishhook manoeuvre to assess the handling performance of a vehicle when it is fitted with: (a) a conventional independent suspension, and (b) an HIS. In the case of the latter, the fluid subsystem is modelled using a nonlinear finite-element approach, resulting in a set of coupled, first-order nonlinear differential equations, which describe the dynamics of the integrated mechanicalhydraulic vehicle system. The simulation results indicate that, in general, the HIS-equipped vehicle possesses superior handling, as measured by the sprung mass roll angle, roll rate, roll acceleration, lateral acceleration and the vehicle's Rollover Critical Factor. The potential effects of the suspension set-up on ride performance are also considered by studying the transient response when one side of the vehicle traverses a half-sine bump. The obtained results are then discussed, and it is shown that they are consistent with previous findings, both by the authors and other researchers. The presented work outlines an alternative approach for studying the dynamics of HIS-equipped vehicles, particularly suited to analyses in the time domain.

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Section: Tyre Modelmentioning

confidence: 99%

“…The roll moment for this vehicle model is calculated using M x =Ḣ x − rH y , as outlined in [15]. H refers to the angular momentum about the given axis (see Figure 1).…”

Section: Vehicle Modelmentioning

confidence: 99%

“…The equations of motion of the nine-DOF vehicle model were derived by Zhang et al [15]. The state variable vector for this model consists of 18 variables:…”

Section: Vehicle Modelmentioning

confidence: 99%

Section: Vehicle Modelmentioning

confidence: 99%

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Hydraulically interconnected vehicle suspension: handling performance

Smith

Zhang

2011

Vehicle System Dynamics

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“…Two rollover propensity tests proved the effectiveness of DDAS, which can actively tilt the vehicle against its roll by supplying restoring forces, from four interconnected hydraulic actuators. Hydraulic power is drawn from a mechanical power steering pump, and the hydraulic circuits are controlled by an [1,[6][7]11]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental investigation of Demand Dependent Active Suspension for vehicle rollover control

Wang

Zhang

2009

Proceedings of the 48h IEEE Conference on Decision and Control (CDC) Held Jointly With 2009 28th Chinese Control Conference

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This paper presents a novel design for demand dependent active suspension (DDAS) focusing on vehicle rollover control. Active suspensions take credit for improving ride comfort and handling performance, but to use active suspension in vehicle rollover control has not been widely investigated. The proposed active suspension design consists of four double direction hydraulic actuators, hydraulically interconnected, and it can actively tilt the vehicle against its roll motion by supplying a required restoring moment, which is over the competence of passive or semi-active suspension. Based on a real vehicle fitted with DDAS, the experimental investigation validates the effectiveness of DDAS in vehicle rollover control. Abstract-This paper presents a novel design for Demand Dependent Active Suspension (DDAS) focusing on vehicle rollover control. Active suspensions take credit for improving ride comfort and handling performance, but to use active suspension in vehicle rollover control has not been widely investigated. The proposed active suspension design consists of four double direction hydraulic actuators, hydraulically interconnected, and it can actively tilt the vehicle against its roll motion by supplying a required restoring moment, which is over the competence of passive or semi-active suspension. Based on a real vehicle fitted with DDAS, the experimental investigation validates the effectiveness of DDAS in vehicle rollover control.

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