Integrated Control of In-Wheel Motor and Electronic Limited Slip Differential for Lateral Stability and Maneuverability

Cha, Hyunsoo; Joa, Eunhyek; Park, Kwanwoo; Yi, Kyongsu; Park, Jae Yong

doi:10.4271/2021-01-0974

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…12,22 When the yaw rate is lower than the reference yaw rate, the eLSD operates as an open differential because the locked differential can interfere with the target motion generation. 21,23,37 Near the limits of handling where tire saturation can occur, the in-wheel motor torque inputs are limited based on the friction circle model. 30 One thing to be note is that the eLSD clutch is opened when the rear inner wheel is saturated since eLSD-locking in the situation can induce an oversteering effect and vehicle spinout.…”

Section: Integrated Control Of In-wheel Motor and Electronic Limited ...mentioning

confidence: 99%

“…21,23 Thus, it is required to design the activating conditions that can transmit the clutch torque in the desired direction. 37 In order to check the feasibility of the desired clutch torque, 5 three indices are devised in this paper as follows: (1) an oversteer index I ovs ; (2) a torque transfer direction index I dir and 3) a handling limit index I limit . The three indices can be defined as follows:…”

Section: Lower-level Controllermentioning

confidence: 99%

“…21,23 Thus, it is required to design the activating conditions that can transmit the clutch torque in the desired direction. 37…”

Section: Integrated Control Of In-wheel Motor and Electronic Limited ...mentioning

confidence: 99%

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An integrated control of front in-wheel motors and rear electronic limited slip differential for high-speed cornering performance

Cha

Hyun

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper presents an integrated control of in-wheel motor (IWM) and electronic limited slip differential (eLSD) for high-speed cornering performance. The proposed algorithm is designed to improve the handling performance near the limits of handling. The proposed controller consists of a supervisor, upper-level controller, and lower-level controller. First, the supervisor determines a target motion based on the yaw rate reference with a target understeer gradient. The target understeer gradient is devised to improve the lateral stability with in-wheel motor control based on a nonlinear static map. The yaw rate reference is designed based on the target understeer gradient to track the yaw reference with eLSD control. Second, the upper-level controller calculates the desired yaw moments for IWM and eLSD to generate the target motion. Third, the lower-level controller converts the desired yaw moment to the actuator torque commands for IWMs and eLSD. The tire friction limits are estimated based on the tire model and friction circle model to prevent tire saturation by limiting the torque inputs. The proposed algorithm has been investigated via both simulations and vehicle tests. The performance of the integrated control was compared with those of individual control and uncontrolled case in the simulation study. The vehicle tests have been performed using a rear wheel drive vehicle equipped with two front IWMs and eLSD in the rear axle. The vehicle test has been conducted at a racing track to show that the proposed algorithm can improve the lateral stability near the limits of handling.

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Section: Integrated Control Of In-wheel Motor and Electronic Limited ...mentioning

confidence: 99%

Section: Lower-level Controllermentioning

confidence: 99%

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An integrated control of front in-wheel motors and rear electronic limited slip differential for high-speed cornering performance

Cha

Hyun

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Direct Yaw Moment Control with 4WD Torque-Vectoring for Vehicle Handling Stability and Agility

Park

Cha

et al. 2022

Int.J Automot. Technol.

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Integrated Control of In-Wheel Motor and Electronic Limited Slip Differential for Lateral Stability and Maneuverability

Cited by 2 publications

References 12 publications

An integrated control of front in-wheel motors and rear electronic limited slip differential for high-speed cornering performance

An integrated control of front in-wheel motors and rear electronic limited slip differential for high-speed cornering performance

Direct Yaw Moment Control with 4WD Torque-Vectoring for Vehicle Handling Stability and Agility

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