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US 8,985,068 B2Granted
Systems and methods for avoiding resonances excited by rotating components
AssigneeRobert Bosch GmbH
InventorDana Nicgorski
Life of this patent
Estimating the term…
Abstract
A system for operating a rotating component. The system includes a rotating component, a motor driving the rotating component, a sensor detecting a stimulus related to the rotating component, and a controller. The controller receives an indication of the magnitude of the stimulus from the sensor and is configured to adjust a speed of the rotating component when the stimulus indicates the rotating component is operating at a resonant frequency.
Claims13
A system comprising:
- a rotating component;
- a motor driving the rotating component;
- a sensor detecting a value of at least one of noise and vibration generated at least in part by the rotating component;
- and
- a controller including a memory, the memory storing a value of noise for each of a plurality of operating speeds of the rotating component, the controller receiving the detected value of noise from the sensor and comparing the detected value of noise to the stored value of noise for the plurality of operating speeds to determine if the rotating component is operating at a resonant frequency, the controller adjusting a speed of the motor when the controller determines the rotating component is operating at a resonant frequency,
- wherein the controller generates the stored value of noise for each of the plurality of operating speeds by increasing a speed of the rotating component from zero to a test operating speed while receiving detected values of noise from the sensor, and storing the value of noise received from the sensor when the speed of the rotating component reaches one of the plurality of operating speeds.
3 more elements
A vehicle comprising:
- a control module;
- an engine cooling fan;
- a motor driving the engine cooling fan;
- a sensor detecting a value of at least one of noise and vibration generated at least in part by the engine cooling fan;
- and
- a motor controller coupled to the control module and controlling the motor to rotate the engine cooling fan based on an indication from the control module, the motor controller receiving an indication of the magnitude of the value from the sensor and adjusting a speed of the engine cooling fan when the value indicates the engine cooling fan is exciting a resonant frequency, wherein the motor controller determines that the rotating component is operating at a resonant frequency when the magnitude of the value exceed a stored magnitude plus a predetermined threshold value, wherein the predetermined threshold value varies based on an environmental condition, and wherein the motor controller generates the stored magnitude for each of a plurality of operating speeds by increasing a speed of the rotating component from zero to a test operating speed while receiving detected magnitudes of the value from the sensor, and storing the magnitude of the value received from the sensor when the speed of the rotating component reaches one of the plurality of operating speeds.
3 more elements
Dependencies are inferred from the claim text.