Active Vibration Absorption System for Absorbing Vibration of a Vibrating Element, Motor Vehicle Having the Active Vibration Absorption System, and Method for Operating the Active Vibration Absorption System

An active vibration absorption system, comprising:

• a control device;
• a vibrating element;
• an electrical coil;
• and
• a first structure-borne sound exciter,
• wherein the first structure-borne sound exciter comprises a coupling element for coupling to the vibrating element, and the first structure-borne sound exciter is configured to:
• detect an induced voltage in the electrical coil, and provide a measurement signal correlated with the detected induced voltage,
• wherein the coupling element is configured to:
• vibrate when the vibrating element is vibrating,
• induce an electromagnetic current in the electrical coil by a motion, and
• move in response to a flow of an electrical current in the electrical coil, and
• wherein the control device is configured to:
• receive the measurement signal,
• identify a first target strength of the electrical current corresponding to the measurement signal to adjust a movement of the coupling element,
• identify a detection component and a control component from the measurement signal,
• identify a second target strength of the electrical current corresponding to the detection component, and
• control an actual strength of the electrical current to meet the first target strength of the electrical current,
• wherein the detection component corresponds to a voltage induced by the vibrating element,
• wherein the control component is produced by the flow of the electric current in the electrical coil, and
• wherein an adjustment of the movement of the coupling element absorbs vibrations of the vibrating element.

A motor vehicle, comprising:

• an active vibration absorption system, comprising:
• a control device;
• a vibrating element;
• an electrical coil;
• and
• a first structure-borne sound exciter,
• wherein the vibrating element is a sheet metal part of the motor vehicle,
• wherein the first structure-borne sound exciter comprises a coupling element for coupling the first structure-borne sound exciter to the vibrating element, and the first structure-borne sound exciter is configured to:
• detect an induced voltage in the electrical coil, and
• provide a measurement signal correlated with the detected induced voltage,
• wherein the coupling element is configured to:
• vibrate when the vibrating element is vibrating,
• induce an electromagnetic current in the electrical coil by a motion, and
• move in response to a flow of an electrical current in the electrical coil, and
• wherein the control device is configured to:
• receive the measurement signal,
• identify a first target strength of the electrical current corresponding to the measurement signal to adjust a movement of the coupling element,
• identify a detection component and a control component from the measurement signal,
• identify a second target strength of the electrical current corresponding to the detection component, and
• control an actual strength of the electrical current to meet the first target strength of the electrical current,
• wherein the detection component corresponds to a voltage induced by the vibrating element,
• wherein the control component is produced by the flow of the electrical current in the electrical coil, and
• wherein the first target strength of the electrical current is set to cause the coupling element to move.

A method, comprising:

• detecting, an induced voltage in an electrical coil of a structure-borne sound exciter, the structure-borne sound exciter is coupled to a vibrating element via a coupling element, wherein the coupling element is configured to:
• vibrate by a vibration of the vibrating element, and
• move in response to a flow of an electrical current in an electric coil,
• induce an electromagnetic current in the electrical coil in response to the movement of the coupling element;
• providing a measurement signal correlated with the detected induced voltage at the structure-borne sound exciter;
• identifying a first target strength of the electrical current corresponding to the measurement signal;
• and
• controlling an actual strength of the electrical current to the meet the first target strength of the electrical current,
• wherein the first target strength of the electrical current causes the coupling element to move,
• thereby absorbing vibrations of the vibrating element.