The Experts below are selected from a list of 2028 Experts worldwide ranked by ideXlab platform
Guillermo Pitagil - One of the best experts on this subject based on the ideXlab platform.
-
synthesis and application of nonlinear observers for the estimation of tire effective radius and Rolling Resistance of an automotive vehicle
IEEE Transactions on Control Systems and Technology, 2013Co-Authors: Charbel El Tannoury, Said Moussaoui, Franck Plestan, Nicolas Romani, Guillermo PitagilAbstract:The Rolling Resistance and the effective radius of a vehicle's tires are two important characteristics that affect its dynamics, performance, and comfort. Because of their dependence on tire inflation pressure, online estimation of such parameters could be used to monitor tire pressures using an indirect approach. By considering rotational and longitudinal dynamics, the aim of this paper proposes to apply observers for this online estimation using measurements of the wheels' angular velocities and the engine torque. Because these signals are available on major vehicle controller area networks, the proposed solutions do not require additional sensors. These nonlinear observers are based, first, on a high-gain approach, and then on a high-order sliding-mode approach, allowing robustness and finite time convergence. The originality of the presented results consists in providing a joint estimation of both variables, i.e., wheel effective radius and Rolling Resistance Force. The observers offer the very first solution for dynamical estimation of Rolling Resistance in standard driving conditions, but the Rolling Resistance is very difficult to estimate by an online procedure. Simulations and experimental results allow the discussion of the effect of tire pressure on these parameters and illustrate the applicability of the proposed approach.
Charbel El Tannoury - One of the best experts on this subject based on the ideXlab platform.
-
synthesis and application of nonlinear observers for the estimation of tire effective radius and Rolling Resistance of an automotive vehicle
IEEE Transactions on Control Systems and Technology, 2013Co-Authors: Charbel El Tannoury, Said Moussaoui, Franck Plestan, Nicolas Romani, Guillermo PitagilAbstract:The Rolling Resistance and the effective radius of a vehicle's tires are two important characteristics that affect its dynamics, performance, and comfort. Because of their dependence on tire inflation pressure, online estimation of such parameters could be used to monitor tire pressures using an indirect approach. By considering rotational and longitudinal dynamics, the aim of this paper proposes to apply observers for this online estimation using measurements of the wheels' angular velocities and the engine torque. Because these signals are available on major vehicle controller area networks, the proposed solutions do not require additional sensors. These nonlinear observers are based, first, on a high-gain approach, and then on a high-order sliding-mode approach, allowing robustness and finite time convergence. The originality of the presented results consists in providing a joint estimation of both variables, i.e., wheel effective radius and Rolling Resistance Force. The observers offer the very first solution for dynamical estimation of Rolling Resistance in standard driving conditions, but the Rolling Resistance is very difficult to estimate by an online procedure. Simulations and experimental results allow the discussion of the effect of tire pressure on these parameters and illustrate the applicability of the proposed approach.
Suyabodha Apiwat - One of the best experts on this subject based on the ideXlab platform.
-
A Relationship between Tyre Pressure and Rolling Resistance Force under Different Vehicle Speed
EDP Sciences, 2017Co-Authors: Suyabodha ApiwatAbstract:Tyres are a final output torque of the vehicle before all the Forces are distributed to the road surface as a tractive Force. When the tyre pressure changed, it had a direct effect on Rolling Resistance Force of the vehicle and reduced the tractive Force. Moreover, it had an effect on a rate of fuel consumption and driving comfort. This research had tested the effect of tyre pressure of 25 psi and 45 psi to determine the total Resistance Force between the vehicle speed from 40 km/hr to 100 km/hr and compare with the reference tyre pressure of 35 psi by using the “coast-down technique”. The results from calculation showed the total Resistance Force when the vehicle speed was zero from tyre pressure of 25 psi increased by 48.52% from reference value and the total Resistance Force from tyre pressure of 45 psi decreased by 13.46% from the reference tyre pressure. The different Resistance Force from tyre pressure of 35 psi with the other 2 values of tyre pressure in the research were called the different Rolling Resistance Force because the vehicle changed only tyre pressure which had no effect on aerodynamics drag. The relationship of the different Rolling Resistance Force along the test speed from tyre pressure of 25 psi and 45 psi decreased while the vehicle speed increased. The relationship can be fitted with a linear equation. The slope from tyre pressure of 25 psi was 0.2358 which was steeper than the slope of 0.0828 from 45 psi tyre pressure. These were the effect of tyre characteristic that made from rubber. When the vehicle speed was low, the frequency of tyre deformation was also low and resulted in high energy loss from hysteresis phenomena. Therefore high Rolling Resistance Force was generated. Considering the effect of tyre under high vehicle speed, the frequency of tyre deformation increased and made the molecule of rubber vibrate more than low vehicle speed. These effects made the tyre stiffer than low frequency and resulted in decreasing the Rolling Resistance Force. In additional, high frequency that caused by high tyre pressure had effected on driving comfort in a real driving condition
Franck Plestan - One of the best experts on this subject based on the ideXlab platform.
-
synthesis and application of nonlinear observers for the estimation of tire effective radius and Rolling Resistance of an automotive vehicle
IEEE Transactions on Control Systems and Technology, 2013Co-Authors: Charbel El Tannoury, Said Moussaoui, Franck Plestan, Nicolas Romani, Guillermo PitagilAbstract:The Rolling Resistance and the effective radius of a vehicle's tires are two important characteristics that affect its dynamics, performance, and comfort. Because of their dependence on tire inflation pressure, online estimation of such parameters could be used to monitor tire pressures using an indirect approach. By considering rotational and longitudinal dynamics, the aim of this paper proposes to apply observers for this online estimation using measurements of the wheels' angular velocities and the engine torque. Because these signals are available on major vehicle controller area networks, the proposed solutions do not require additional sensors. These nonlinear observers are based, first, on a high-gain approach, and then on a high-order sliding-mode approach, allowing robustness and finite time convergence. The originality of the presented results consists in providing a joint estimation of both variables, i.e., wheel effective radius and Rolling Resistance Force. The observers offer the very first solution for dynamical estimation of Rolling Resistance in standard driving conditions, but the Rolling Resistance is very difficult to estimate by an online procedure. Simulations and experimental results allow the discussion of the effect of tire pressure on these parameters and illustrate the applicability of the proposed approach.
Said Moussaoui - One of the best experts on this subject based on the ideXlab platform.
-
synthesis and application of nonlinear observers for the estimation of tire effective radius and Rolling Resistance of an automotive vehicle
IEEE Transactions on Control Systems and Technology, 2013Co-Authors: Charbel El Tannoury, Said Moussaoui, Franck Plestan, Nicolas Romani, Guillermo PitagilAbstract:The Rolling Resistance and the effective radius of a vehicle's tires are two important characteristics that affect its dynamics, performance, and comfort. Because of their dependence on tire inflation pressure, online estimation of such parameters could be used to monitor tire pressures using an indirect approach. By considering rotational and longitudinal dynamics, the aim of this paper proposes to apply observers for this online estimation using measurements of the wheels' angular velocities and the engine torque. Because these signals are available on major vehicle controller area networks, the proposed solutions do not require additional sensors. These nonlinear observers are based, first, on a high-gain approach, and then on a high-order sliding-mode approach, allowing robustness and finite time convergence. The originality of the presented results consists in providing a joint estimation of both variables, i.e., wheel effective radius and Rolling Resistance Force. The observers offer the very first solution for dynamical estimation of Rolling Resistance in standard driving conditions, but the Rolling Resistance is very difficult to estimate by an online procedure. Simulations and experimental results allow the discussion of the effect of tire pressure on these parameters and illustrate the applicability of the proposed approach.
