A comparison on optimal torque vectoring strategies in overall performance enhancement of a passenger car

Jaafari, Seyed Mohammad Mehdi; Shirazi, Kourosh Heidari

doi:10.1177/1464419315627113

Cited by 10 publications

(8 citation statements)

References 21 publications

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“…For an operating vehicle, lots of freedom exists in the whole system, the simplification must be done based on the researchers' focus. Normally, a 2 DOF model is established as the reference model and the multiple DOF model such as the 8, 10, or 14 DOF model is established to verify the torque distribution algorithms (Jaafari and Shirazi, 2016); (Goodarzi et al, 2011). In this case, 2 and 8 DOF vehicle dynamic models are built.…”

Section: Vehicle Dynamic Modelmentioning

confidence: 99%

Integrated stability control for a vehicle in the vehicle-to-grid system on low adhesion coefficient road

2022

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For the vehicle-to-grid system, the dynamic performance of the vehicle in the transportation system is quite crucial. The stability of the vehicle is the basis of the whole system. Compared to the traditional vehicle, the vehicle with a torque distribution system allows the vehicle to have a better dynamic performance. The torque distribution method has attracted a lot of attention from researchers. Most of the current work focuses on the vehicle on the concrete road. To improve the vehicle lateral stability in the critical work condition, the nonlinear reference model and vehicle dynamic model with 8 degrees of freedom are established based on the vehicle dynamic theory. An integrated active front steering (AFS) and direct yaw control (DYC) controller are designed based on LQR (Linear quadratic regulator) and vehicle stability phase portrait. To evaluate the performance of the vehicle on the road with a relatively low adhesion coefficient. The double lane-change and fishhook maneuver are chosen as the work condition. The steering angle, wheel torque, vehicle routine, phase portrait track, and yaw rate are calculated and compared. The simulation result validates the effectiveness of the proposed integrated AFS and DYC control method. The stability of the vehicle on the low adhesion coefficient road can lay a good foundation of the vehicle-to-grid system.

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Section: Vehicle Dynamic Modelmentioning

confidence: 99%

Integrated stability control for a vehicle in the vehicle-to-grid system on low adhesion coefficient road

2022

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“…There is a relationship with respect to the number of teeth of the above gear members and the relationship has been provided in the form of equation 1as presented below. 29 The general formula for calculating the gear ratio in a gear mechanism is presented in equation (2). In case of PGS, locking of different components translates different gear ratios.…”

Section: Pgtsmentioning

confidence: 99%

“…High-speed automotive gearbox is gaining attention with growing demand ushering better driving experience and greater control, 1 which can be realized through multiple gear ratios and proper gear shifting strategies. 2,3 It can be achieved with epicyclic gear train or planetary gear train (PGT), with the help of actuators like clutch and brake. The PGT has good transmission efficiency and can provide multiple gear ratios with multiple gear element interaction.…”

Section: Introductionmentioning

confidence: 99%

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A heuristic synthesis of multistage planetary gearbox layout for automotive transmission

Bhattacharjee

Bhola

Dan

2018

Proceedings of the Institution of Mechanical Engineers, Part K:

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The automatic transmission system is very crucial for the high-speed vehicles, where the planetary or epicyclic gearbox is a standard feature. With the increase in design intricacies of planetary gearbox, mathematical modelling has become complex in nature and therefore there is a need for modelling of multistage planetary gearbox including the shifting scheme. A random search-based synthesis of three degrees of freedom (DOF) high-speed planetary gearbox has been presented in this paper, which derives an efficient gear shifting mechanism through designing the transmission schematic of eight speed gearboxes compounded with four planetary gear sets. Furthermore, with the help of lever analogy, the transmission power flow and relative power efficiency have been determined to analyse the gearbox design. A simulation-based testing and validation have been performed which show the proposed model is efficient and produces satisfactory shift quality through better torque characteristics while shifting the gears. A new heuristic method to determine suitable compounding arrangement, based on mechanism enumeration, for designing a gearbox layout is proposed here. An important finding on automotive gear shift quality due to closer gear ratio is also reported in this work.

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“…Vehicle handling, stability, safety, and comfort are important challenges in designing chassis control systems. These systems include electronic stability control (ESC), 1 anti-lock brake system (ABS), 2 active suspension, 3 active front steering (AFS), 4 traction control system (TCS), 5 direct yaw moment control (DYC), 6 and torque vectoring system, 7 which are designed and manufactured by different suppliers and with various control technologies. Performance conflict among different control subsystems such as braking, steering, and suspension may occur because of the interaction between longitudinal, lateral, and vertical dynamics.…”

Section: Introductionmentioning

confidence: 99%

Managing driving disturbances in lateral vehicle dynamics via adaptive integrated chassis control

Ahmadian

Khosravi

Sarhadi

2020

Proceedings of the Institution of Mechanical Engineers, Part K:

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This paper presents a vehicle stability control method based on a multi-input multi-output (MIMO) model reference adaptive control (MRAC) strategy as an advanced driver assistance system (ADAS) to enhance the handling and yaw stability of the vehicle lateral dynamics. The corrective yaw moment and additive steering angle are generated using direct yaw moment control (DYC) and active front steering (AFS) at the upper control level in the hierarchical control algorithm. A nonlinear term is added to the conventional adaptive control laws to handle parametric uncertainties and disturbances. The desired yaw moment generated by the upper-level controller is converted to the brake forces and is distributed to the rear wheels by an optimal procedure at the lower-level. The major contribution of this study is the introduction of a nonlinear integrated adaptive control method based on a constraint optimization algorithm. To verify the effectiveness of the proposed control strategy, the nonlinear integrated adaptive controller, and linear time-varying MRAC are designed and used for comparison. Simulation results are performed for the J-turn and double lane change (DLC) manoeuvres at high speeds and low tyre-road friction coefficients. The desired performance of the proposed controller exhibited significant improvement compared to the conventional MRAC in terms of yaw rate tracking and handling of sideslip limitation.

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A comparison on optimal torque vectoring strategies in overall performance enhancement of a passenger car

Cited by 10 publications

References 21 publications

Integrated stability control for a vehicle in the vehicle-to-grid system on low adhesion coefficient road

Integrated stability control for a vehicle in the vehicle-to-grid system on low adhesion coefficient road

A heuristic synthesis of multistage planetary gearbox layout for automotive transmission

Managing driving disturbances in lateral vehicle dynamics via adaptive integrated chassis control

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