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Blending control of the trolleybus traction and brake drives to enhance the braking efficiency of a vehicle

Safonau Andrei, Vovk Yuriy, Lyashuk Oleg, Khudobei Roman

Journal of Sustainable Development of Transport and Logistics

2020

Vol. 5, No. 2

49--61

Widespread usage of emission free public transport is the preferred strategy in many cities to reduce a congestion and pollution from the road traffic. The trolleybus is a kind of urban public transport, i.e. a fully electric vehicle, which is considered as a promising tool to enhance the efficiency of public transport and to attain the goals of sustainable development and quality of city life. The operation control of service brake system and secondary brake system (the braking torque of traction electric motor) is realized with help of one pedal in the trolleybus. Thus, there are modes of the joint operation for these systems during the braking process. Authors focus on the development of rule-based algorithm for the blending control of traction electric motor and anti-lock braking system to enhance the overall braking efficiency of a vehicle. The mathematical model of the trolleybus braking dynamics was developed for this purpose. Test bench and ride tests on different road surfaces were carried out to determine the parameters of vehicle braking efficiency and to validate the developed mathematical model. The corresponding experimental data were used to analyse the efficiency of proposed rule-based strategy for the blending control of traction electric motor and anti-lock braking system of the trolleybus. As a result, the availability of proposed control algorithm is confirmed, which secures the required braking efficiency and provides a high braking stability of the vehicle.

Stanowisko do badania sterowania trakcją pojazdu z niezależnym elektrycznym napędem kół

Mizan M., Karwowski K.

Przegląd Elektrotechniczny

2007

R. 83, nr 12

69-73

W nowoczesnych samochodach stosowane są układy zwiększające poziom bezpieczeństwa czynnego. W pojeździe z elektrycznym niezależnym napędem kół ich funkcje mogą być realizowane poprzez odpowiednie oprogramowanie. Do wstępnej weryfikacji algorytmów sterowania trakcją zbudowano stacjonarne stanowisko laboratoryjne, wykorzystujące sterowniki z mikrokontrolerami DSP oraz silniki synchroniczne z magnesami trwałymi. Przeprowadzono badania zaproponowanych algorytmów sterowania pojazdu z niezależnym napędem dwóch kół.

In modern road vehicles the active safety systems as ABS, ASR or ESP are applied. In electric vehicles with the separate wheel drives such tasks may be realized more effectively without additional equipment, only by software. For verification of the traction control algorithms the stationary laboratory set-up was designed and built, based on the DSP-microcontrollers and permanent magnet synchronous motors. Several tests of proposed control algorithms for vehicle with direct independently driven two wheels are carried out.