Longitudinal vehicle dynamics using Simulink/Matlab

In the last decade student teams at the Faculty of Engineering of the University of Debrecen have designed and constructed several race cars with alternative (electric or pneumatic) drives and took part and achieved successes in domestic and international competitions. For more successful racing a simulation program has been developed in Matlab for the calculation of the vehicle dynamic functions of the cars from their technical data. Currently, it has become a prerequisite of successful racing because of the large number of the possible values of technical data we can select the optimal ones by applying the above program combined with an optimizing procedure. The detailed description of the developed dynamic model and simulation program, together with the vehicle dynamics functions generated by the program are presented here. The description of the optimizing procedure will be presented elsewhere.

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“…In references [12,13,14,15,16] other examples for vehicle dynamics simulation programs are presented.…”

Section: The Simulation Programmentioning

confidence: 99%

Dynamic Simulation of a Prototype Race Car Driven by Series Wound DC Motor in Matlab- Simulink

Szántó¹,

Hajdú²,

Szíki³

2020

ACTA POLYTECH HUNG

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“…T e (u t , N e ) = T ei + (a 0 + a 1 N e + a 2 N 2 e )u t (29) where T ei is the engine torque when the throttle is closed. A characteristic of a gasoline engine is given in Figure 3.…”

Section: Inner-loop Design For Torque Controllermentioning

confidence: 99%

Nonlinear cascade strategy for longitudinal control in automated vehicle guidance

Attia

Orjuela

Basset

2014

Control Engineering Practice

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International audienceThis paper deals with automatic control design for automotive driving with a special focus on the longitudinal control. The automotive vehicle is a complex system characterised by highly nonlinear longitudinal and lateral coupled dynamics. Consequently, the control design for automated driving should deal with both of these dynamic couplings. Indeed, the longitudinal control plays an important role in the automated guidance to ensure safety and comfort of automotive passengers. In this work, a nonlinear cascade longitudinal control based on inner and outer-loops design is proposed. The lateral control is handled following a model predictive approach ensuring the automated steering of the vehicle. Finally, the nonlinear longitudinal control is integrated with the lateral control in a whole architecture to perform a coupled longitudinal and lateral control. The effectiveness of the automated driving strategy is highlighted through simulation results

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“…The vehicle dynamics is classified into two separate categories [14]: (1) the dynamics of powertrain comprising of the engine, the torque converter, the gear box, the final drive, and the wheels; (2) the dynamics of the vehicle considering the external forces acting on the vehicle. These include aerodynamic drag force, gravitational force, and rolling resistance force.…”

Section: Vehicle Longitudinal Modelmentioning

confidence: 99%

Fuel Efficiency by Coasting in the Vehicle

Shakouri

Ordys

Darnell

et al. 2013

International Journal of Vehicular Technology

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This paper investigates the possibility of improving the fuel efficiency by decreasing the engine speed during the coasting phase of the vehicle. The proposed approach is stimulated by the fact that the engine losses increase with the engine speed. If the engine speed is retained low, the engine losses will be reduced and subsequently the tractive torque will be increased, enabling the vehicle to remain moving for longer duration while coasting. By increasing the time period of the coasting the fuel efficiency can be increased, especially travelling downhill, since it can benefit from the kinematic energy stored in the vehicle to continue coasting for a longer duration. It is already industry standard practice to cut fuel during coasting and refuel at low engine speed. The substantial difference proposed in this paper is the controlled reduction of engine speed during this phase and thus reduction in the engine losses, resulting in improved fuel economy. The simulation model is tested and the results illustrating an improvement to the fuel efficiency through the proposed method are presented. Some results of the experimental tests with a real vehicle through the proposed strategy are also presented in the paper.

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Longitudinal vehicle dynamics using Simulink/Matlab

Cited by 35 publications

References 3 publications

Dynamic Simulation of a Prototype Race Car Driven by Series Wound DC Motor in Matlab- Simulink

Dynamic Simulation of a Prototype Race Car Driven by Series Wound DC Motor in Matlab- Simulink

Nonlinear cascade strategy for longitudinal control in automated vehicle guidance

Fuel Efficiency by Coasting in the Vehicle

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