Abstract: A device and a computer-implemented method for determining a variable of a technical system, using a machine learning model. A kernel for the model is selected from a set of kernels as a function of a selection criterion, and a first data set which includes mutually assigned input variables and output variables of the technical system. The selection criterion is determined for a kernel that is selected from the set of kernels as a function of an acquisition function, the acquisition function being determined as a function of a second data set that includes pairs of kernels from the set of kernels and a selection criterion. The pairs of kernels are determined over respectively one pair of kernels from the set of kernels and as a function of the second data set. Representations of a first and second kernel are provided.

Abstract: A device and computer-implemented method for machine learning. A probabilistic model is provided, in particular a model that includes a probability distribution, preferably a Gaussian process or a Bayesian neural network, the model being defined as a function of at least one hyperparameter, in particular of the Gaussian process or of the Bayesian neural network. In one iteration, an instruction for a first measurement is determined and output as a function of the model. For the at least one hyperparameter an a posteriori distribution over values for the at least one hyperparameter being determined as a function of the first measurement. In another iteration, an instruction for a second measurement is determined and output as a function of the model. At least one value of the at least one hyperparameter is determined as a function of the second measurement.

Abstract: Apparatus, system and computer-implemented method of operating a technical system. A first variable of the technical system is mapped onto a prediction for a second variable of the technical system using a Gaussian process, and the technical system is operated depending on the prediction. The Gaussian process, depending on a sum of a first Gaussian process, weighted with a first weight function, is determined with a second Gaussian process. The first Gaussian process maps the first variable based onto a first prediction of the second variable, and the second Gaussian process maps the first variable onto a second prediction for the second variable. Sub-domains of a domain and/or a value range of the Gaussian process are determined depending on a numerical representation of a binary tree with leaves and nodes.

Abstract: The invention relates to a control circuit (27) for a waste heat recovery system (2) for a heat engine (36). The waste heat recovery system (2) comprises at least one evaporator (21) for converting waste heat from the exhaust gas (31, 31a) generated by the heat engine (36) into a working medium (23), at least one expansion machine (24) which can be driven by the working medium (23), at least one condenser (25) for condensing the working medium (23a) expanded in the expansion machine (24) into the liquid state (23b), and at least one conveying device (26) for increasing the pressure of the condensed working medium (23b) and conveying same into the evaporator (21). The control circuit (27) influences at least one control variable which controls the energy transmission from the exhaust gas (31, 31a) to the working medium (23b) and/or the energy transmission from the working medium (23c) to the expansion machine (24).

Abstract: The invention relates to a method for generating a control variable trajectory for an actuator so as to influence an input variable of a system, wherein a set point is supplied to the output variable of the system of a trajectory planning procedure, which from the set point generates a trajectory of constrained input values for a filter integrator chain and a trajectory of flat desired states, wherein the trajectory of constrained input values and the trajectory of flat desired states are supplied to a flatness-based feedforward control procedure that generates therefrom the control variable trajectory for the actuator, wherein in the trajectory planning procedure so as to generate the trajectory of constrained input values at least one constraint is applied in dependence upon the trajectory of flat desired states.

Abstract: The invention relates to a control circuit (27) for a waste heat recovery system (2) for a heat engine (36). The waste heat recovery system (2) comprises at least one evaporator (21) for converting waste heat from the exhaust gas (31, 31a) generated by the heat engine (36) into a working medium (23), at least one expansion machine (24) which can be driven by the working medium (23), at rl least one condenser (25) for condensing the working medium (23a) expanded in the expansion machine (24) into the liquid state (23b), and at least one conveying device (26) for increasing the pressure of the condensed working medium (23b) and conveying same into the evaporator (21). The control circuit (27) influences at least one control variable which controls the energy transmission from the exhaust gas (31, 31a) to the working medium (23b) and/or the energy transmission from the working medium (23c) to the expansion machine (24).

Abstract: A method for parameterizing a functional software of a vehicle, including: receiving information about a vehicle state, transmitting the information about the vehicle state via a communication interface addressed to a remote processing unit outside the vehicle, and receiving, at the local processing unit in the vehicle, information about at least one parameter for influencing the vehicle behavior, which was transmitted by the remote processing unit outside the vehicle, via the communication interface.

Abstract: A method for operating a supercharging device for an internal combustion engine, the supercharging device being supported as an exhaust gas-driven supercharging device by an electric motor-driven supercharger drive or being operated exclusively by the electric motor-driven supercharger drive, the electric motor-driven supercharger drive being operated as a function of a setpoint actuating torque, the setpoint actuating torque being determined as a function of a pilot control torque from a pilot control unit and a control actuating torque from a rotational speed control unit.

Abstract: The invention relates to a method for generating a control variable trajectory for an actuator so as to influence an input variable of a system, wherein a set point is supplied to the output variable of the system of a trajectory planning procedure, which from the set point generates a trajectory of constrained input values for a filter integrator chain and a trajectory of flat desired states, wherein the trajectory of constrained input values and the trajectory of flat desired states are supplied to a flatness-based feedforward control procedure that generates therefrom the control variable trajectory for the actuator, wherein in the trajectory planning procedure so as to generate the trajectory of constrained input values at least one constraint is applied in dependence upon the trajectory of flat desired states.

Abstract: A method for operating a supercharging device for an internal combustion engine, the supercharging device being supported as an exhaust gas-driven supercharging device by an electric motor-driven supercharger drive or being operated exclusively by the electric motor-driven supercharger drive, the electric motor-driven supercharger drive being operated as a function of a setpoint actuating torque, the setpoint actuating torque being determined as a function of a pilot control torque from a pilot control unit and a control actuating torque from a rotational speed control unit.

Abstract: A method for parameterizing a functional software of a vehicle, including: receiving information about a vehicle state, transmitting the information about the vehicle state via a communication interface addressed to a remote processing unit outside the vehicle, and receiving, at the local processing unit in the vehicle, information about at least one parameter for influencing the vehicle behavior, which was transmitted by the remote processing unit outside the vehicle, via the communication interface.

Abstract: A method for ascertaining the rotor temperature of a permanent-magnet synchronous machine (10), in which a first estimate (TR1) for the rotor temperature is ascertained as a function of a remanent flux density of permanent magnets contained in a rotor of the synchronous machine (10). A second estimate (TR2) for the rotor temperature is ascertained via a Kalman filter containing a thermal model of the synchronous machine (10), the first estimate (TR1) for the rotor temperature being supplied at least intermittently to the Kalman filter.

Abstract: The state of charge of at least one battery unit of a rechargeable battery is initially estimated, and at least one variable of the battery unit which describes the state of health of this battery unit at a selected operating point with the aid of a model is estimated. The variable describing the state of health is an instantaneous charge capacity of the battery unit, which is estimated from the load current of the battery unit at the operating point and the reciprocal value of the derivation over time of the previously estimated state of charge of the battery unit.

Abstract: Disclosed are a device and a method for determining position information of the rotor shaft of an electric machine based on at least one recorded input signal of the electric machine, the recorded input signal being supplied to a model of the electric machine. The position information of the rotor shaft is determined with the aid of the model, based on the supplied input signal, the model mapping nonlinear saturation effects of the electric machine. The model of the electric machine is an extended Kalman filter in which the nonlinear saturation effects of the electric machine are described by a polynomial.

Abstract: A method for ascertaining the rotor temperature of a permanent-magnet synchronous machine (10), in which a first estimate (TR1) for the rotor temperature is ascertained as a function of a remanent flux density of permanent magnets contained in a rotor of the synchronous machine (10). A second estimate (TR2) for the rotor temperature is ascertained via a Kalman filter containing a thermal model of the synchronous machine (10), the first estimate (TR1) for the rotor temperature being supplied at least intermittently to the Kalman filter.

Abstract: A method for diagnosing a load drop in a piezo actuator in an injection device, a voltage being measured and being compared to a threshold voltage (24) for the diagnosis, the load drop being present if the measured voltage is greater than the threshold voltage (24). The present invention also relates to a device for diagnosing a load drop in a piezo actuator in an injection device, to a computer program and to a computer program product.

Abstract: The invention describes a device and a method for monitoring a piezoelectric actuator. It is checked whether a discharge time assumes an inadmissible value, whether the voltage at the piezoelectric actuator assumes an inadmissible value and whether a fault signal is present. A short circuit of a battery switch is detected if the three conditions are met.