Limiting torque noise by simultaneous tuning of speed PI controller parameters and feedback filter time constant
AssigneeABB Schweiz AG
InventorArne Wahrburg
Life of this patent
Estimating the term…
Abstract
A control circuit includes: a controller; a controlled system; and a filter for smoothing a return signal. The controller acts on the controlled system vis-à-vis a control signal and the return signal acts on the controller. The controller and the filter are simultaneously adjustable by an adjustment. In an embodiment, the adjustment is made on the basis of a method that includes: measuring or estimating an output signal as a measurement or estimate; transferring, using the measurement or estimate, the output signal into the return signal; determining a power density spectrum of the return signal; and limiting a control signal of the controller such that a power of the control signal does not exceed a predefined limiting value.
Claims5
A system comprising:
- a controller;
- a controlled system;
- and
- a filter configured to smooth a return signal,
- wherein the controller is configured to act on the controlled system vis-à-vis a control signal and the return signal is configured to act on the controller,
- wherein the system is configured to:
- measure or estimate an output signal as a measurement or estimate;
- transfer, using the measurement or estimate, the output signal into the return signal;
- determine a power density spectrum of the return signal;
- and
- limit a control signal of the controller, based on the determined power density spectrum, such that a value of the control signal does not exceed a predefined limiting value.
A method for making an adjustment of a controller and a filter of a control circuit comprising:
- a controller;
- a controlled system;
- and
- a filter configured to smooth a return signal,
- wherein the controller is configured to act on the controlled system vis-à-vis a control signal and the return signal is configured to act on the controller, and
- wherein the controller and the filter are simultaneously adjustable;
- the method comprising the following steps:
- measuring or estimating an output signal as a measurement or an estimate;
- transferring, using the measurement or estimate, the output signal into the return signal;
- determining a power density spectrum of the return signal;
- and
- limiting a control signal of the controller, based on the determined power density spectrum, such that a value of the control signal does not exceed a predefined limiting value.
Dependencies are inferred from the claim text.