A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to identify a wheel having a force imbalance based on wheel speed data from each of a plurality of vehicle wheels, and to identify a wheel force imbalance fault when the force imbalance exceeds at least one of a distance threshold and a time threshold.

A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to identify a wheel having a force imbalance based on wheel speed data from each of a plurality of vehicle wheels, and to identify a wheel force imbalance fault when the force imbalance exceeds at least one of a distance threshold and a time threshold.

A method for balancing a vehicle wheel includes mounting a wheel to be balanced on a rotating shaft of a machine computerized for measuring imbalances, and selecting an optimum commercial balancing weight which, when positioned on a correction plane, minimizes residual imbalance on reference planes of the wheel where the balancing tolerance is considered. One compares the residual imbalance value at the reference planes with the prescribed balancing tolerance after subtracting a vector of the static imbalance generated by the optimum balancing weight. An indicator device is activated to indicate on the wheel the optimum axial position of a correction plane for a balancing weight where the residual imbalance at the reference planes is within tolerance.

A method for balancing a vehicle wheel includes mounting a wheel to be balanced on a rotating shaft of a machine computerized for measuring imbalances, and selecting an optimum commercial balancing weight which, when positioned on a correction plane, minimizes residual imbalance on reference planes of the wheel where the balancing tolerance is considered. One compares the residual imbalance value at the reference planes with the prescribed balancing tolerance after subtracting a vector of the static imbalance generated by the optimum balancing weight. An indicator device is activated to indicate on the wheel the optimum axial position of a correction plane for a balancing weight where the residual imbalance at the reference planes is within tolerance.

A method of monitoring the health of an aircraft propeller whilst the propeller is in operation, the propeller having a plurality of blades extending radially outwardly from a central axis extending through the propeller and a propeller drive shaft, is provided. The method includes obtaining measurements representative of strain in the propeller drive shaft using multiple primary strain sensors, each primary strain sensor providing respective measurements representative of strain. The primary strain sensors are located around a circumference of the drive shaft of the propeller, and each strain sensor is located such that it crosses a plane defined by the radial direction of a blade and the central axis, the plane being bounded by the central axis. A corresponding propeller health monitoring system, an aircraft propeller comprising the system and an aircraft comprising the propeller are also provided.

A method of monitoring the health of an aircraft propeller whilst the propeller is in operation, the propeller having a plurality of blades extending radially outwardly from a central axis extending through the propeller and a propeller drive shaft, is provided. The method includes obtaining measurements representative of strain in the propeller drive shaft using multiple primary strain sensors, each primary strain sensor providing respective measurements representative of strain. The primary strain sensors are located around a circumference of the drive shaft of the propeller, and each strain sensor is located such that it crosses a plane defined by the radial direction of a blade and the central axis, the plane being bounded by the central axis. A corresponding propeller health monitoring system, an aircraft propeller comprising the system and an aircraft comprising the propeller are also provided.

A method is for correcting an imbalance in a computed tomography system, in which a supporting structure includes a radiation source is fitted on a fixed mounting frame. The supporting structure rotates together with the radiation source about a measurement space, in which is fixed in place a measurement object having a known attenuation response for the radiation emitted by the radiation source. The method includes detecting first measurement data of the radiation while the supporting structure rotates about the measurement object, determining an imbalance arising during the rotation of the supporting structure on the basis of the acquired first measurement data of the radiation, and determining a position and a weight of at least one counterweight on the supporting structure in order to reduce the determined imbalance, or determining correction data, which is used to correct the imbalance in software.

A method is for correcting an imbalance in a computed tomography system, in which a supporting structure includes a radiation source is fitted on a fixed mounting frame. The supporting structure rotates together with the radiation source about a measurement space, in which is fixed in place a measurement object having a known attenuation response for the radiation emitted by the radiation source. The method includes detecting first measurement data of the radiation while the supporting structure rotates about the measurement object, determining an imbalance arising during the rotation of the supporting structure on the basis of the acquired first measurement data of the radiation, and determining a position and a weight of at least one counterweight on the supporting structure in order to reduce the determined imbalance, or determining correction data, which is used to correct the imbalance in software.

Technical solutions are described for damping dependent scaling for wheel imbalance reduction in steering systems. An example method includes determining roadwheel speed energy using a roadwheel speed signal. The method further includes determining that the roadwheel speed energy is greater than a predetermined energy threshold, and in response, adjusting the roadwheel speed signal, and computing a wheel imbalance reduction using the adjusted roadwheel speed signal. The method further includes, in case of determining that roadwheel speed energy is not greater than the predetermined energy threshold, and in response computing the wheel imbalance reduction using the roadwheel signal, without any adjustment. The method further includes computing a motor torque command using the wheel imbalance reduction, the motor torque command used to generate a corresponding amount of torque at a handwheel.

A vibration detection device for detecting vibration of a cartridge including a bearing housing that accommodates a rotor coupling a wheel and a rotor shaft, and a bearing rotatably supporting the rotor, the bearing housing including a lubricant-oil passage port for allowing lubricant oil to pass through an interior of the bearing housing, includes: a sensor mount attached to an oil-flow-passage forming member configured to be capable of connecting to and separating from the bearing housing, the oil-flow-passage forming member including, inside thereof, an oil flow passage through which one of lubricant oil to be supplied to the interior of the bearing housing via the lubricant-oil passage port or lubricant oil discharged from the interior of the bearing housing via the lubricant-oil passage port flows; a vibration sensor disposed on the sensor mount; and a vibration transmission leg portion connected to the sensor mount and configured to be in contact with the bearing housing in a state where the oil-flow-passage forming member is connected to the bearing housing.