This paper develops an optimal speed control using a linear quadratic integral (LQI) control standard with/without an observer in the system based on an integrated battery-electric vehicle (IBEV) model. The IBEV model includes the dynamics of the electric motor, longitudinal vehicle, inverter, and battery. The IBEV model has one state variable of indirectly measured and unobservable, but the system is detectable. The objectives of this study were: (a) to create a speed control that gets the exact solution for a system with one indirect measurement and unobservable state variable; and (b) to create a speed control that has the potential to make a more efficient energy system. A full state feedback LQI controller without an observer is used as a benchmark. Two output feedback LQI controllers are designed; including one controller uses an order-4 observer and the other uses an order-5 observer. The order-4 observer does not include the battery state of charge as an observer state whereas the order-5 observer is designed by making all the state variable as the observer state and using the battery state of charge as an additional system output. An electric passenger minibus for public transport with 1500 kg weight was used as the vehicle model. Simulations were performed when the vehicle moves in a flat surface with the increased speed from stationary to 60 km/h and moves according to standard NEDC driving profile. The simulation results showed that both the output feedback LQI controllers provided similar speed performance as compared to the full state feedback LQI controller. However, the output feedback LQI controller with the order-5 observer consumed less energy than with the order-4 observer, which is about 10% for NEDC driving profile and 12% for a flat surface. It can be concluded that the LQI controller with order-5 observer gives better energy efficiency than the LQI controller with order-4 observer


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Designing optimal speed control with observer using integrated battery-electric vehicle (IBEV) model for energy efficiency



    Erscheinungsdatum :

    2018-12-30


    Anmerkungen:

    doi:10.14203/j.mev.2018.v9.89-100
    Journal of Mechatronics, Electrical Power, and Vehicular Technology; Vol 9, No 2 (2018); 89-100 ; Journal of Mechatronics, Electrical Power and Vehicular Technology; Vol 9, No 2 (2018); 89-100 ; 2088-6985 ; 2087-3379



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629




    VEHICLE DRIVING CONTROL METHOD WITH OPTIMAL BATTERY ENERGY EFFICIENCY

    WOO MIN SOO | Europäisches Patentamt | 2023

    Freier Zugriff

    VEHICLE DRIVING CONTROL METHOD WITH OPTIMAL BATTERY ENERGY EFFICIENCY

    WOO MIN SOO | Europäisches Patentamt | 2023

    Freier Zugriff

    Robust Vehicle Speed Control Using Disturbance Observer in Hybrid Electric Vehicles

    Kim, Sangjoon / Bang, Jae Sung / Kim, Sungdeok et al. | Springer Verlag | 2020


    Road motion control electric vehicle with speed and torque observer

    Foito, Daniel / Gaspar, Manuel / Pires, V. Fernao | IEEE | 2013


    ELECTRIC ASSIST VEHICLE WITH INTEGRATED SPEED CONTROL

    SCHIEFFELIN ZACHARY | Europäisches Patentamt | 2024

    Freier Zugriff