Dynamics simulation studies on the electric city car with an electromechanical differential and the rear wheels drive

Abstract

Abstract.Here we present one of the more complex models for studying the stability of driving an electric car with electromechanical differential systems. The purpose of simulation is to choose a structure of the control system for a velocity control on driven wheels (an algorithm of a differential) most appropriate for the driver. This type of goal is particularly important in the case of a disabled driver sitting in a wheelchair. The modeling takes into account both the mechanical and electric structure of the vehicle, and finally the human element -a simple model of human impact on the steer by a wire system. Modeling and simulation have used MBS package (SimMechanics). The results of the simulation have showed the best algorithms of an electromechanical differential for the velocity control of rear drive wheels: with setting a velocity difference or with an average velocity controller in the point A of the centre of a car front axle.

Simulation research of driveability of the ECO electric car

“…Reference books describe various ways of modelling the preset route and vehicle driving methods. As the examples of models used, we can list so called anticipation [1], [5], direction [19], vector [11] or adaptive models [15], [22]. In the discussed simulation model, own model has been used based on simple dependencies of Ackermann model [25] including, however, elements of anticipation of direction control, distance from the track centre and the driver's experience.…”

“…1 presents the photograph of the pre-prototype car. In the course of design work, partial research results were published on the choice of drive system structure and parameters [20], research on the energy consumption of hybrid battery-capacitor source of energy [14], [21], [24], as well as driveability of the dynamics model [19].…”

A switched reluctance motor control method limiting the maximum dc source current in the low-speed range

“…Modern cars with ICE are equipped with Start/Stop system which automatically turns off the engine once the vehicle is stopped and restarts it when the accelerator pedal is depressed again. A very good solution, in this case, it is the use of either electric or hybrid propulsion system which does not consume any energy when the vehicle is stopped [1,2]. One of several types of machines which are used to drive electric vehicles are switched reluctance motors (SRM).…”

Assessment of safety and ride quality based on comparative studies of a new type of universal steering wheel in 3D simulators

“…ECO steering wheel is essentially adapted to drive cars with Steerby-wire system [13,6]. This solution makes it possible to program the steering angle corresponding to the maximum steering angle of the front wheels.…”