There is provided a misalignment detecting device being capable of detecting and correcting distortion of a spoked wheel with a simple configuration. The misalignment detecting device includes: supporting frames 12a, 12b to which the spoked wheel 30 to be inspected is set; a first light source 13 that is attached to the supporting frame and irradiates first detected light to the spoked wheel set on the supporting frame in an axial direction of the spoked wheel; a first line sensor 14 that is attached to the supporting frame so as to be capable of receiving the first detected light and detects radial distortion of the spoked wheel without contact based on the received first detected light; a second light source 15 that is attached to the supporting frame and irradiates second detected light to the spoked wheel set on the supporting frame in a direction intersecting the axial direction of the spoked wheel; and a second line sensor 16 that is attached to the supporting frame so as to be capable of receiving the second detected light and detects axial distortion of the spoked wheel without contact based on the received second detected light.

A conveyor control system detects imbalances in a multi-drive conveyor belt and institutes a corrective action to rectify the imbalances. A sensor detects imbalances by measuring gaps between consecutive conveyor modules near a drive for the conveyor belt. A controller can initiate an alarm or automatically modify one or more drives to correct a detected imbalance.

The present disclosure provides an apparatus to measure swing mass moments of sports implements. The present disclosure further provides an apparatus to measure a center of mass point of sports implements. Some embodiments of the present disclosure further provide a single, compact apparatus configured to measure both a swing mass moment and a center of mass point of a sports implement. The disclosed swing mass measurement apparatus provides a compact mechanical device configured to quickly, accurately measure even small differences of implement swing mass. The disclosed center of mass point measurement apparatus provides a large roller rod adjuster, allowing easy adjustment of tested implements into balance of center mass over rod, then a touch stylus is moved into contact with the tested implements handle, for an accurate location measurement, that is projected onto a double size scale readout for enhanced comprehension.

A system and method for controlling rotor dynamics at a rotor assembly. The system includes a magnetic actuator and a controller. The magnetic actuator is positioned in magnetic communication with the rotor assembly and is configured to obtain a measurement vector corresponding to the rotor assembly and a measurement vector indicative of a rotor dynamics parameter. The magnetic actuator is further configured to selectively output an electromagnetic force at the rotor assembly. The controller is configured to store and execute instructions. The instructions include outputting, via the magnetic actuator, a baseline electromagnetic force to the rotor assembly; obtaining the measurement vector at the rotor assembly from the magnetic actuator; determining non-synchronous vibrations corresponding to the rotor assembly based at least on the measurement vector and a rotor speed of the rotor assembly; determining cross coupled stiffness corresponding to the rotor assembly based at least on the measurement vector, the rotor speed, and a predetermined rotor dynamics model of the rotor assembly; determining an adjusted electromagnetic force of the rotor assembly based at least on the cross coupled stiffness and a damping factor corresponding to the electromagnetic force output from the magnetic actuator; and generating an output signal corresponding to the adjusted electromagnetic force to the rotor assembly.

A method is described for calibrating a balancing machine, in which a rotor (1) to be corrected is rotatably mounted in bearings (2) and a correction run k is performed, wherein at least one measuring sensor (3) determines an initial vibration of the rotor (1) prior to an imbalance correction and transmits this vibration to an evaluation device (4), which stores the measured value as vibration vector {right arrow over (s)}.sub.0. After an imbalance on the rotor (1) is corrected, a residual vibration of the rotor (1) is measured by measuring sensor (3), transmitted to the evaluation unit (4) and stored as vibration vector {right arrow over (s)}.sub.1. The difference {right arrow over (s)}={right arrow over (s)}.sub.1-{right arrow over (s)}.sub.0 formed from the measurement data and the corrected imbalance is stored for compensation run k as {right arrow over (s)}.sub.k and {right arrow over (u)}.sub.k by the evaluation unit (4). To undertake a calibration of the machine, one can either determine a process calibration matrix K by solving the equation system S=UK.sup.T using the collected measurement data or one can select an already available process calibration matrix using the initial vibration {right arrow over (s)}.sub.0 and/or imbalance vector {right arrow over (u)} and store it as a calibration matrix in the evaluation unit (4) and use it to calculate an unknown imbalance vector of a rotor (1).

A method is described for calibrating a balancing machine, in which a rotor (1) to be corrected is rotatably mounted in bearings (2) and a correction run k is performed, wherein at least one measuring sensor (3) determines an initial vibration of the rotor (1) prior to an imbalance correction and transmits this vibration to an evaluation device (4), which stores the measured value as vibration vector {right arrow over (s)}.sub.0. After an imbalance on the rotor (1) is corrected, a residual vibration of the rotor (1) is measured by measuring sensor (3), transmitted to the evaluation unit (4) and stored as vibration vector {right arrow over (s)}.sub.1. The difference {right arrow over (s)}={right arrow over (s)}.sub.1-{right arrow over (s)}.sub.0 formed from the measurement data and the corrected imbalance is stored for compensation run k as {right arrow over (s)}.sub.k and {right arrow over (u)}.sub.k by the evaluation unit (4). To undertake a calibration of the machine, one can either determine a process calibration matrix K by solving the equation system S=UK.sup.T using the collected measurement data or one can select an already available process calibration matrix using the initial vibration {right arrow over (s)}.sub.0 and/or imbalance vector {right arrow over (u)} and store it as a calibration matrix in the evaluation unit (4) and use it to calculate an unknown imbalance vector of a rotor (1).

A method for detecting an unbalanced payload condition in a machine is disclosed. The method includes detecting, by a first sensor, a pressure exerted on each of one or more struts in the machine by a payload. The method further includes detecting, by a second sensor, one or more operational parameters associated with machine. Furthermore, method includes determining, by a controller, a center of gravity of the payload based on detected pressure, the one or more operational parameters, and one or more dimensions of the machine. Additionally, the method includes determining, by the controller, a force being exerted, by the payload, on each traction member of the machine based on the center of gravity of the payload. The method further includes detecting, by the controller, the unbalanced payload condition when the force, being exerted on at least one traction member of the plurality of traction members, exceeds a threshold value.

A method for detecting an unbalanced payload condition in a machine is disclosed. The method includes detecting, by a first sensor, a pressure exerted on each of one or more struts in the machine by a payload. The method further includes detecting, by a second sensor, one or more operational parameters associated with machine. Furthermore, method includes determining, by a controller, a center of gravity of the payload based on detected pressure, the one or more operational parameters, and one or more dimensions of the machine. Additionally, the method includes determining, by the controller, a force being exerted, by the payload, on each traction member of the machine based on the center of gravity of the payload. The method further includes detecting, by the controller, the unbalanced payload condition when the force, being exerted on at least one traction member of the plurality of traction members, exceeds a threshold value.

A modular method of balancing a rotor assembly comprising two or more rotor sub-assemblies comprises dynamically balancing a set of rotor units each comprising one of the rotor sub-assemblies (52) and in which every other rotor sub-assembly is substituted by a respective simulator (54A, 56A). A respective set (55X, 55Y, 55Z) of balancing weights is applied to one or more of the rotor sub-assembly and simulators of a rotor unit (50A) to achieve dynamic balancing such that each set only corrects unbalance contributed by that rotor sub-assembly or simulator to which it is applied. Each set which is applied to a simulator is transferred to the corresponding sub-assembly. The sub-assemblies are then mated to form the balanced rotor assembly. Excitation of flexible modes of the balanced rotor assembly during its rotation is reduced or avoided.

When vibration information calculated using measurement information is classified using a distance between measurement points which is calculated using the point information, even in a case in which a plurality of vibration modes with close vibration frequencies are present at the same time, stability determination at a high speed and a high accuracy is realized. A system stability monitoring apparatus which monitors system stability of a power system includes a measurement information collecting unit that collects measurement information of a plurality of points in the power system, a vibration analyzing unit that calculates vibration information indicating vibration of a system state in the plurality of points using the measurement information, an information storage unit that stores point information including position information of the plurality of points, and a vibration classifying unit that classifies the vibration information based on the point information.