摘要:
A method, actuating device, and microsystem device are described for controlling a micromechanical actuator, which has a rechargeable capacitor for generating a mechanical motion of the micromechanical actuator, a memory having a lookup table containing previously computed data of signal shapes for controlling the micromechanical actuator, and a driver circuit having a driver circuit control unit for processing the previously computed data, a power stage for generating the signal shapes, and an output for outputting the signal shapes, corresponding to previously computed data, to the micromechanical actuator's rechargeable capacitor. The micromechanical actuator has a limiting device, between the output of the driver circuit and the micromechanical actuator, which is for limiting a voltage excursion of the signal shapes output by the driver circuit, which are usable for generating the mechanical motion by recharging the micromechanical actuator's rechargeable capacitor. The micromechanical actuator's power consumption is reducible by limiting the voltage excursion.
摘要:
A circuit configuration for a node of a bus system includes a transceiver circuit and a control circuit connected to the transceiver circuit. The transceiver circuit has an idle mode, in which it has a reduced power consumption in comparison with at least one operating mode, and the transceiver circuit is supplied with power in the at least one operating mode via a power supply unit integrated into the transceiver circuit. The control circuit is connected to the power supply unit to supply the control circuit with power in the idle mode, and the circuit configuration has a controllable voltage regulator which is coupled to the transceiver circuit in such a way that the voltage regulator is deactivated in the idle mode to reduce the power consumption and activated in the operating mode to supply power to the transceiver circuit and the control circuit.
摘要:
A method and a device are described for determining the rotational direction and/or rotational speed of a rotatable body on the basis of a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed of the rotatable body and are output by a sensor, having at least one of the following steps: recording a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed, at a point in time; determining a phase value from the sine signal and cosine signal; recording sine signals and cosine signals, which is assignable to the rotational direction and/or rotational speed, at points in time; determining phase values from the corresponding sine signals and cosine signals; calculating phase differences from the phase values and the phase value; and determining the rotational direction and/or rotational speed from the phase differences on the basis of a Vernier method.
摘要:
The invention proposes a method for determining a rotation angle or distance by evaluating a multitude of phase measurement values. By means of a linear transformation A, the phase values measured in an N-dimensional space are projected into N-1 new signals Si. These signals Si are transformed by a quantizing device into corresponding integer values Wi and converted into N real values Zi by means of a linear projection C. These values have weighted phase measurement values &agr;i added to them in modulo 2&pgr; fashion, which yields N estimates for the angle &phgr; to be measured. The N estimates are corrected if needed at their skip points and are added up in a weighted fashion, taking into account their phase angle.
摘要:
The invention proposes a method for determining a rotation angle (&PHgr;) and/or an angular difference (&dgr;) in a divided shaft (3), which has a number of phase tracks (1a, 1b, 2a, and 2b) disposed on it, which are provided with codes. Via an evaluation unit, each group of tracks (1a, 1b, 2a, and 2b) supplies a phase signal (&agr;1, &agr;2), which is respectively ambiguous with regard to a rotation of the shaft (3). The at least two phase signals (&agr;1, &agr;2) are added up in a weighted fashion to produce a signal S from which the integer portion and the non-integer portion are calculated. The non-integer portion is proportional to the angular difference (&dgr;) between the two track groups. The torque (M) is determined through multiplication with the spring rate of an interposed torque rod. The unambiguous torque (&PHgr;) is determined from the integer portion of the signal (S) and a phase value (&agr;1) or (&agr;2) with the aid of a weighted addition.
摘要:
A control circuit for a microelectromechanical element includes: a waveform generator, which is designed to generate a digital trigger signal for the microelectromechanical element, a modulator, which is designed to oversample the digital trigger signal, to subject the signal to a noise shaping, and to output the oversampled and noise-shaped digital trigger signal; and a digital driver device, which is designed to drive the microelectromechanical element using the oversampled and noise-shaped digital trigger signal.
摘要:
A controller for actuating a micromechanical actuator, including a first signal input which is designed to receive a reference signal, a second signal input which is designed to receive a measuring signal which denotes a recorded response by the micromechanical actuator to a control signal, a first controller element which is designed to filter and/or to attenuate predefined frequency modes and/or predefined frequency components in the received reference signal and to output a filtered and/or attenuated reference signal, a second controller element which is designed to modify the received measuring signal in order to minimize the quality of the first mode of the received measuring signal and to output a modified measuring signal, a third controller element which is designed to minimize the deviation between the filtered and/or attenuated reference signal and the received measuring signal and to output a minimized reference signal, a fourth controller element which is designed to modify the bandwidth of the received measuring signal and to subtract it from the minimized reference signal, which makes up the control signal. Furthermore, a corresponding actuating system, a corresponding micro-mirror system and a corresponding method are described.
摘要:
A method and a device are described for determining the rotational direction and/or rotational speed of a rotatable body on the basis of a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed of the rotatable body and are output by a sensor, having at least one of the following steps: recording a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed, at a point in time; determining a phase value from the sine signal and cosine signal; recording sine signals and cosine signals, which is assignable to the rotational direction and/or rotational speed, at points in time; determining phase values from the corresponding sine signals and cosine signals; calculating phase differences from the phase values and the phase value; and determining the rotational direction and/or rotational speed from the phase differences on the basis of a Vernier method.
摘要:
A system for checking a program memory) of a processing unit includes a check module, and the processing unit is made up of an instruction counter connected to the check module. The check module has a register connected to a first changeover switch that sets the register content. In a system that allows for the instruction addresses of the entire program memory to be checked, the instruction counter contains an ancillary counter, which runs through the instruction address space of the program memory independently of the program code during normal operation and which is connected to the register.
摘要:
In a method for detecting a rolling motion of a wheel in a motor vehicle, a wheel acceleration variable characterizing a wheel acceleration is recorded using at least one sensor element, the wheel acceleration variable is scanned at various scanning points in time, and the presence of a rolling motion is detected with the aid of the scanned values. The wheel acceleration variable is scanned in a cycle, including at least three scanning points in time, of nonequidistant points in time.