Angular displacement

About: Angular displacement is a research topic. Over the lifetime, 5102 publications have been published within this topic receiving 46081 citations. The topic is also known as: rotational displacement.

Method of measuring the angular position of the axis of rotation of a wheel

Abstract: For measuring the angular position of the rotational axis of a wheel, in relation to the longitudinal axis of the associated vehicle, a sight line is provided across an extension of the rotary axle of the wheel and substantially in a plane in common with the longitudinal axis, and that optical extensions of the sight line in both directions are compared with each other each in one point with respect to the positions of the points relative to the longitudinal axis

The automatic adjustment of tension in material drawn off a roll

Abstract: A roll (12) of material (11) is placed on a spindle (14) mounted for rotation in a housing (22), the material is drawn off the roll and thus turns the spindle. (The spindle may be motor driven). The housing (22) is able to accommodate an angular displacement to provide an indication of the tension in the material. A speed controller (38) is provided to apply the necessary change in speed to the spindle rotation, the amount of change being controlled by the amount of angular displacement. Both mechanical and electrical control arrangements are disclosed, one of which applies a brake force on tension below the optimum and the other of which releases a brake force for tension higher than the optimum.

Propulsion unit of vehicle

Abstract: In a propulsion unit of a vehicle, a rotational displacement detection mechanism is covered or shielded from magnetic flux and radio wave noise which leak from the dynamotor to reduce noise occurring in a signal of the rotational displacement detection mechanism. A magnetic-proof member is disposed between the dynamotor and the rotational displacement detection mechanism in order to shield the mechanism from magnetic flux and/or the radio wave noise.

Three-dimensional joint range of motion measurements from skeletal coordinate data.

Abstract: Frequently, joint range of motion is reported for a single plane (eg., sagittal, coronal, or transverse). However, the arc of joint motion during functional activities and many clinical tests encompasses motion in all three planes simultaneously. The purposes of this paper are to discuss a method to obtain relative joint three-dimensional angular displacement measurements using coordinates from skeletal landmarks and provide an analytical example of the method using three-dimensional angular displacement of the knee joint as a model. In order to calculate the three-dimensional relative motion, an orthogonal reference frame for each bone needs to be established. To establish the local reference frame, three noncollinear points are used to define unit vectors that are mutually perpendicular. Three-dimensional angles can be determined to describe the magnitude of the moving body rotation angles about the X, Y, and Z axes. These angles indicate the relative motion of body segments for abduction/adduction, fle...

Methods, systems and apparatus for controlling a multi-phase inverter

Abstract: Embodiments of the present invention relate to methods, systems, a machine-readable medium operable in a controller, and apparatus for controlling a multi-phase inverter that drives a multi-phase electric machine. When a sensor fault is detected, a phase current angle is computed based on the feedback stator currents, and used to estimate an angular velocity and an angular position of a rotor of the multi-phase electric machine. When the estimated angular velocity of the multi-phase electric machine is less than a transition angular velocity threshold, an open-circuit response can be applied at the multi-phase inverter by controlling all switches in the multi-phase inverter drive to be open. By contrast, when the estimated angular velocity is greater than the transition angular velocity threshold, a short-circuit response can be applied at the multi-phase inverter by controlling selected switches in the multi-phase inverter drive to connect all phases of the multi-phase inverter to a single bus (e.g., either the plus bus or the minus bus).