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Simulation is considered as an essential activity to save time and cost of building physical prototyping hardware. However, systems from different engineering domains such as control system design, mechanical design, or hydraulic design generally requires different simulation tools. To tackle this situation, the method of co-simulation is applied to communicate between different processes during simulation. It is served as the foundation of sophisticated virtual prototyping system simulation activities. This paper presents the effort at Visteon of applying co-simulation to design and verify the electronically controllable torque bias device. The controller modules are developed in MATLAB. ADAMS is applied to create a high-fidelity virtual prototyping vehicle model. The vehicle model is then modified to integrate the function of torque bias control devices. The co-simulation of the controller modules with the vehicle model is performed by using ADAMS/Controls.

This paper describes the modeling of driveline systems with electronically controllable torque biasing devices. It focuses on the application of torque distribution for vehicle yaw stability control. Three types of driveline torque bias arrangements as well as the concepts of the yaw moment control with respect to these devices are introduced. To systematically derive the equations of motion of driveline systems, the techniques of Bond Graphs are applied in this paper. The derived driveline model is further integrated into a full vehicle model developed in ADAMS to monitor the vehicle responses with different driveline torque bias strategies. Since the controller is developed in MATLAB and the vehicle model is built in ADAMS, the methodology of co-simulation is applied to communicate the control algorithms with the vehicle model in synchronize time.