Method for controlling a torque transmitting device with learning function

A control device for controlling a torque transmitting device for coupling a first torque transmitting element to a second torque transmitting element, the torque transmitting device comprising a fluid actuator that actuates the first and second torque transmitting elements, a pressure chamber, in which the fluid actuator is movably received, wherein the pressure chamber comprises a filling space communicating with a pressure source via a valve controlling displacement of the fluid actuator, the valve being for connecting to the control device, the control device comprising:

• means for storing a reference profile for a control variable, wherein a chronological progress of said control variable influences a position of the fluid actuator for actuating first and second torque transmitting elements;
• means for determining the control variable during each coupling;
• and
• means for operating the valve for applying a pressure source to the fluid actuator, the means for operating the valve being configured to carry out a feed forward closed or open loop control algorithm such that the control variable follows the reference profile,
• the control device being configured so that for executing the feed forward closed or open loop control algorithm, the control device has a learning loop for compensating an error between the control variable and the reference profile, wherein the learning loop processes, in preparation for a next coupling, an output signal of a learning loop of a last coupling as well as a difference between the control variable and a reference profile at the last coupling,
• wherein each first or second torque transmitting element is connected to a first shaft or a second shaft, the control device having an input for a signal representing a revolution speed of the first shaft and/or a revolution speed of the second shaft and
• wherein the control device is configured to adjust at least one parameter of the reference profile to compensate for changes in system properties that affect the coupling time and smoothness of the coupling with respect to a target profile for a revolution speed of the first shaft and/or for a revolution speed of the second shaft
• or
• the control device further comprising means for determining an input torque of the torque transmitting device and/or an output torque of the torque transmitting device and said control device being configured to adjust at least one parameter of the reference profile to compensate for changes in system properties that affect the coupling time and smoothness of the coupling with respect to a target profile for the input torque of the torque transmitting device and/or the output torque of the torque transmitting device.