Abstract
This paper proposes a novel computationally efficient, easy-to-implement electromagnetic hysteresis based dynamics model of a kind of intelligent electromagnetic torque controlled coupling (EMTC), which, with drag torque under consideration, first models the electromagnetic hysteresis existing in the primary clutch with the classical Preisach model, and then models the transferred torques in the three friction elements of the center coupling in the slipping and locked modes, respectively. The performance of the model is verified by simulation and experiment jointly, which lays the basis for the development of advanced control algorithm.
Highlights
Electric all-wheel drive vehicles have been a hot topic recently [1,2,3,4,5], the majority of
Ando [16] came up with two 3D maps to describe the relations between vehicle speed, clutch opening, front-rear wheel speed difference and the driving torque output by EMTC which is quite implementable in the controller
This paper is organized in three parts: First, the electromagnetic force generated by the primary clutch apply system is modeled utilizing the Preisach model in the environment of Matlab/Simulink; the central clutch status will be decided between ‘slipping’ and ‘locked’ modes based on the vehicle states detected by sensors, and the driving torques transferred in condition of the two modes will be calculated; and the model built in this paper will be verified through a real-car experiment regarding the slipping and locked modes
Summary
Electric all-wheel drive vehicles have been a hot topic recently [1,2,3,4,5], the majority of. AWD vehicles evolution of the three generations of EMTC, the high fuel economy and excellent performance has attracted much attention of researchers [6,7,8,9,10], a solid and effective model of the AWD make it widely used in many. Torii [11] proposed the modeling method of an electronically controlled torque-splitting multi-plate clutch, which is the prototype of today’s EMTC. Ando [16] came up with two 3D maps to describe the relations between vehicle speed, clutch opening, front-rear wheel speed difference and the driving torque output by EMTC which is quite implementable in the controller. Ando [19] described the third generation of electronically controlled AWD coupling that contributed higher fuel efficiency by reducing the drag torque due to the viscosity of the lubricant while the clutches were not engaged. This paper is organized in three parts: First, the electromagnetic force generated by the primary clutch apply system (coil and armature) is modeled utilizing the Preisach model in the environment of Matlab/Simulink; the central clutch status will be decided between ‘slipping’ and ‘locked’ modes based on the vehicle states detected by sensors, and the driving torques transferred in condition of the two modes will be calculated; and the model built in this paper will be verified through a real-car experiment regarding the slipping and locked modes
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