A control system controls a power transmission system located between a motive power source and drive wheels. The power transmission system includes a fluid coupling and an engagement device. The control system includes an electronic control unit configured to: obtain information concerning vibration of the power transmission system; determine whether the vibration of the power transmission system is in a resonance region of the power transmission system; control the engagement device so that the engagement device slips, when the electronic control unit determines that the power transmission system is in the resonance region; and control the motive power source when the electronic control unit determines that the power transmission system is in the resonance region, so that a rotational speed of the motive power source increases as compared with a case where the power transmission system is not in the resonance region.

A control device 11 of a power transmission device 1 sets an allowable range of a temporal change rate of an inter-element driving force transmitted between a driving element 4 (elastic member) and a driven element 5 such that the allowable range changes in accordance with an observed value of the amount of elastic deformation of the elastic member (driving element 4), and controls the inter-element driving force, via an actuator 2, in such a way as to restrict the temporal change rate of the inter-element driving force to be within the allowable range thus set.

A vehicle includes a system and method of operating a gearbox of the vehicle. The vehicle includes an interface for entering a desired vehicle acceleration and a processor. The system includes a processor. The processor is configured to receive the desired vehicle acceleration, create an objective function that relates the desired vehicle acceleration to a torque, perform an optimization process on the objective function to determine the torque, and apply the torque to the vehicle to achieve the desired vehicle acceleration.

The disclosure relates to a method for operating a drive assembly or a work machine. The drive assembly comprises a main drive element, a first and second clutches, and a traction drive. The method comprises the following steps: identifying a target torque progression of the drive assembly, and identifying a slip point at the first clutch, and setting and/or adjusting the direction of the relative rotational speed of the first and second clutch. The rotational speed of the main drive element is set and/or adjusted until the direction of the relative rotational speed of the first and second clutches is the same, and transmitting the torque from the first clutch to the second clutch. The torque of the drive assembly follows the target torque progression, and synchronizing the second clutch. The disclosure further relates to a drive assembly and to a work machine.