Design of dry dual clutch transmission actuator controller for simultaneous kissing point identification using multiple sliding surfaces

This paper suggests a dry dual clutch transmission actuator controller for simultaneous kissing point identification by using multiple sliding surfaces, so that the actuator motor positions at the clutch kissing point of both clutches can be estimated during the first launching after the car starts. Such maneuver can be especially advantageous for the vehicles without ROM that keeps the recent kissing point estimations. Separate multiple sliding surface controllers are designed for each actuator, and PI-type actuator motor model-based observers are designed to swiftly identify the kissing point position relative to the initial motor position measured by incremental encoders attached to each actuator motor. Also, methodologies to reduce the jerk that may arise from the simultaneous kissing point identification are suggested. The controller and estimation performance is verified by taking the entire driveline with the forward and reverse engine torque map, physical parameters of the transmission, and actuator model into consideration, and simulations are conducted with the inclusion of sensor measurement noise and friction model to reflect realistic vehicle driveline using MATLAB/Simulink.