A Study on Pitching Characteristics of the Passenger Car in Braking Process

Wang, Xuanfeng; Shi, Guang; Jin, Lingge; Ying, Guozeng; Yang, Hongwei

doi:10.1007/978-3-642-33795-6_42

Cited by 3 publications

(2 citation statements)

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“…Typically, control of the pitch angle falls in the domain of active suspensions [8], [9]. However, it is well known that the suspension geometry, and specifically the location of the front and rear pitch centres and corresponding anti-dive and anti-lift properties have an effect on the vehicle vertical and pitch motions during longitudinal acceleration/deceleration [10], [11], [12], which depends on the ratio of front to rear longitudinal tyre forces. Specific anti-(i.e.…”

Section: Introductionmentioning

confidence: 99%

“…In order to develop the control strategy we first introduce a vehicle model with longitudinal, vertical and pitch dynamics that incorporates the front and rear suspension pitch centre locations and anti-lift/dive geometry, which allows the model to capture the effect of longitudinal force distribution between front and rear axles on the chassis dynamics. The model finds its origin in [12]. It has been modified and simplified in the suspension dynamics and geometry definition, but also properly augmented with a longitudinal jerk equation, for control design.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Feedback brake distribution control for minimum pitch

Tavernini

Velenis

Longo

2017

Vehicle System Dynamics

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The distribution of brake forces between front and rear axles of a vehicle is typically specified such that the same level of brake force coefficient is imposed at both front and rear wheels. This condition is known as ‘ideal’ distribution and it is required to deliver the maximum vehicle deceleration and minimum braking distance. For subcritical braking conditions, the deceleration demand may be delivered by different distributions between front and rear brak- ing forces. In this research we show how to obtain the optimal distribution which minimises the pitch angle of a vehicle and hence enhances driver subjective feel during braking. A vehi- cle model including suspension geometry features is adopted. The problem of the minimum pitch brake distribution for a varying deceleration level demand is solved by means of a model predictive control technique. To address the problem of the undesirable pitch rebound caused by a full-stop of the vehicle, a second controller is designed and implemented independently from the braking distribution in use. An extended Kalman filter is designed for state esti- mation and implemented in a high fidelity environment together with the model predictive control strategy. The proposed solution is compared with the reference ‘ideal’ distribution as well as another previous feed-forward solution

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%