Abstract: A stabilization system including a platform supported by two or more rotatably-coupled gimbal frames each having a pivot assembly disposed at its rotation axis to couple an actuator to a rotation sensor having a rotation-sensitive sensor axis that is fixedly disposed with respect to the rotation axis, and a controller including means for accepting the sensor signals and for producing each motor signal needed to dispose the platform in a predetermined angular position with respect to each rotation axis independent of changes in the base orientation. A motion simulator embodiment includes controller means for accepting an external slew signal sequence and means for producing the motor signals needed to move the platform along a predetermined sequence of positions represented by the slew signal sequence.

Abstract: A tool connecting device includes a shaft having a non-circular socket opening for receiving a non-circular rotatable member of a tool member to allow the tool member to be selectively tilted relative to the shaft to different angular position. A protrusion is extended from the tool member for engaging with the shaft to anchor the rotatable member to the shaft and to prevent the tool member from being tilted relative to the shaft. A control ferrule may be slidably engaged onto the shaft to selectively retain the tool member in line with the shaft and to prevent the tool member from being tilted relative to the shaft, or to allow the tool member to be slanted and tilted relative to the shaft to different angular position.

Abstract: A device may include a camera to capture an image; a sensor to measure, when the camera captures the image, information indicative of an angular displacement, about a line of sight of the camera, of an orientation of the device away from a reference orientation of the device; storage to store the measured information for rotating the image relative to a frame of the image based on the angular displacement.

Abstract: Position measurements by a tracking system associated with a survey tool are corrected for tilt. The tracking station typically incorporates some offset from the surface across which a survey is conducted, and the offset will be subject to angular displacement as the tool tilts with respect to its normal orientation. The tracking system records the 3D position of the survey tool, with angular offset errors. In the disclosed examples, an inertia! measurement unit (IMU), a dual axis inclinometer or a combination of two single axis inclinometers measures the amount of angular offset. The angular offset data is used to correct the position data, e.g. to reduce or eliminate errors caused by the angular offset, e.g. from vertical. If the tool provides measurement data, e.g. GPR readings, processing of the measurement data from the survey tool uses the corrected position data, e.g. to produce images of sub-surface features or objects.

Abstract: The purpose of this study was to evaluate the effects of ankle bracing on rearfoot angular displacement and angular velocity during a sudden inversion movement. A 1 x 3 factorial design was used. The single independent variable was ankle brace condition with three levels: semi-rigid, lace-up and control. The two dependent variables were rearfoot average angular displacement and average angular velocity. Twenty-four healthy volunteers participated in this study. A motion analysis system was used to capture, model and calculate two-dimensional rearfoot motion while the subjects' ankle/foot complex was inverted to 35 degrees on a platform device. All subjects performed five trials of each ankle brace condition, and the average of these trials was used for statistical analysis. The semi-rigid brace significantly reduced rearfoot angular displacement and angular velocity compared with the lace-up (P<0.05) and control conditions (P<0.05). Additionally, the lace-up style brace demonstrated significantly less rearfoot angular displacement and angular velocity compared with the control condition (P<0.05). These results demonstrate that a semi-rigid ankle brace is more superior then a lace-up style brace in limiting rearfoot angular displacement and angular velocity. Moreover, the lace-up style brace offers significant restriction of these measures compared with no support.

Abstract: One end of a rotational shaft of a supporting rotational body attached with a rotational member is rotatably supported. The rotational member is sandwiched by a supporting frame that rotatably supports supporting rotational bodies spanned with an annular belt and fixing members fixed to the supporting frame. Thus, the one end of the rotational shaft is supported by the supporting frame and the fixing members at, at least two points. A mark detector is fixed to the fixing members, and the fixing members are fixed to the supporting frame at, at least two points. Accordingly, erroneous detection of a rotational angular speed or a rotational angular displacement of a supporting rotational body due to vibration of the supporting rotational body can be suppressed.

Abstract: An exercise device for improving balance, comprising a platform; a balancing element mounted to the platform so as to permit angular displacement of the balancing element relative to the platform; an adjustable angular displacement limiter for determining a limit of the angular displacement of the balancing element relative to the platform; and an adjustment access path to provide adjustment access to the limiter while the balancing element is operably mounted to the platform.

Abstract: Detecting position information related to a face, and more particularly to an eyeball in a face, using a detection and ranging system, such as a Radio Detection And Ranging (“RADAR”) system, or a Light Detection And Ranging (“LIDAR”) system. The position information may include a location of the eyeball, translational motion information related to the eyeball (e.g., displacement, velocity, acceleration, jerk, etc.), rotational motion information related to the eyeball (e.g., rotational displacement, rotational velocity, rotational acceleration, etc.) as the eyeball rotates within its socket.

Abstract: In some SMA-actuated systems the stress of the SMA element changes as a result of the motion of the actuator. Such complex thermomechanical loadings, for example, take place in rotary SMA actuators. For this and similar SMA actuators, the phase transformation temperatures, that define the actuation of the SMAs, vary due to the change in the stress. The control problem for such systems is challenging and therefore sophisticated control algorithms are needed. This paper presents two nonlinear algorithms for control of a single-degree-of-freedom rotary manipulator actuated by shape memory alloy (SMA) wire. For this system the stress of the SMA wire changes as the arm moves upwards and the stress reaches its maximum at a certain angular position. Therefore, the transformation temperatures of the SMA wire, as the arm moves, increase, and after reaching the maximum stress position they decrease. The controllers designed in this study use the stress and temperature of the SMA wire while the only state variable that can be readily measured is the angular position of the arm. Due to measurement difficulties, the other three state variables, arm angular velocity and SMA wire stress and temperature, cannot be directly measured. Therefore, an extended Kalman filter (EKF) is used by the controllers to estimate the unmeasured state variables. As shown by simulations in this work, the controllers, which are also applicable for other SMA actuators under similar complex loadings, provide precise motion control for the SMA actuator.

Abstract: Medical Practioners usually measure dorsiflection of the human joint angle for medical assessment purpose. In order to measure the joint angle, a more or less standard mechanical or electro-mechanical goniometer is used. But mechanical construction has many problems. This research is originated from the lack of user-friendly, versatile and not expensive apparatus which are commercially available. In this paper, we present new design concepts of goniometer utilizing the light refraction characteristics of optical fiber in order to measure angular displacement of the human joints. In order to form an asymmetrical beam profile at the end of fiber tips, we cut the end of fiber tip at an angle of 35 degrees. Phototransistor is used to measure beam intensity as a function of optical fiber angle with respect to optical axis of fiber. Thus the sensed signal represented an indirect measure of curvature angle. The result showed that asymmetrical beam profile provide wider linear relationship than symmetrical one. Eventually, overall performance of the proposed sensor is quite suitable for measurement of the human joint angle.

Abstract: A control device pivots an X-ray arrangement repeatedly between two final angular positions about a pivot axis. Projections of an object arranged in the region of the pivot axis and moving iteratively are detected at a plurality of angular positions and supplied to the control device. The control device also receives a phase position referring to the object and assigns the phase position to each projection. A computer selects one or more projections whose phase position corresponds at least approximately to a reconstruction phase position. If the computer has selected one projection for an angular position, it determines this projection as a reconstruction projection. If the computer has selected a plurality of projections for an angular position, it detects the reconstruction projection using these projections. The computer then detects a three-dimensional reconstruction of the object based on the reconstruction projection.

Abstract: An angle sensor device for determining angular position information and/or angular speed information of a movable object, the angle sensor device comprising at least one magnetically encoded region arranged on the movable object, at least one magnetic field detector, and an angular position and/or angular speed information determining unit, wherein the at least one magnetic field detector is adapted to detect a signal generated by the at least one magnetically encoded region when the at least one magnetically encoded region moving with the movable object passes a surrounding area of the at least one magnetic field detector, and wherein the angular position and/or angular speed information determining unit is adapted to determine angular position information and/or angular speed information of the movable object based on the detected signal.

Abstract: A theory of time-space coordinate transformation is presented for measuring space with time. A novel type of displacement sensor named time grating is developed, and methods of electronic rectifying, self-compensation and self-correction are proposed to intelligentize the sensor. Experiment results coming from applications conform to the validity of the proposed theory and methods. The experiment and test results show that high-precision measurement is achieved without high-precision manufacture and that angular displacement is measured very accurately without a dividing scale, which embeds the remarkable characteristics of low cost but high accuracy to the time grating sensor.

Abstract: An improved powered hinge (20) with an automatic locking feature proximate the ends of permissible relative angular displacement of its two hinge sections broadly includes: a stationary member (23) having a pivotal axis (x-x), and having a first slot (31) extending between opposite ends; a movable member (24) mounted for rotation about the pivotal axis relative to the stationary member, and having a second slot (34) extending between opposite ends; a driving member (28) adapted to be rotated about the pivotal axis relative to the sta¬ tionary member from one angular position to another, angular position, and having a third slot (36) extending between opposite ends; and an elongated pin (29) passing through the first, second and third slots, the pin being constrained for movement substantially parallel to the pivotal axis; the first, second and third slots being so configured and arranged that as the driv¬ ing member is rotated from the one angular position to the other angular position, the pin will be moved from substantially one end of the each of the slots to substantially the other end of each of the slots, and the movable member will be rotated about the pivotal axis relative to the stationary member.

Abstract: We have developed an angular displacement-enhanced polarimeter to measure optically active media such as blood glucose Traditionally, optical angular displacement induced by optically active media is based on the measurement of intensity change Instead, we measure phase change In addition, the phase change is enhanced using the null-detection technique, which is achieved by incorporating a retardation-tunable wave-plate and an analyzer into a custom-made common-path heterodyne polarimeter The optical common-path setup for the interference of TE and TM waves in our system is employed to reduce noise from the environment The enhancement of this system can reach to two orders in amplitude when the retardation of the retardation-tunable wave-plate is set to approach 180° With this polarimeter, the measurement of optical angular displacement with a resolution of 1 × 10 −4 ° has been experimentally demonstrated, corresponding to a 25 mg/dl concentration resolution This approach, based on our knowledge, appears to be the most accurate for phase measurement and has the potential to be a tool for noninvasive glucose monitoring

Abstract: A method of determining a leakage in a piston machine comprising at least two pistons (2, 2'), where: the rotational velocity of the piston machine (1) , and therefore the volume flow through the piston machine (1) , is varied periodically as part of a time-limited active test while measuring the differential pressure and the angular position; - an angular position-based Fourier analysis of the measured values from differential pressure and rotational velocity measurements performed during said test are used to experimentally determine the amplitude ratio and phase angle difference between volume flow variations and pressure variations; and said amplitude ratio and phase angle difference are used, together with an angular position-based Fourier analysis of the measurements of differential pressure and rotational speed made after the active test, to determine the amplitude and phase of the leakage flow

Abstract: An angular position adjusting apparatus for adjusting the angular position of a control panel of an image processing apparatus is disclosed that includes a rotary member attached to the control panel, an input part for generating an input signal indicative of changing the angular position of the control panel, a motor part connected to the rotary member for changing the angular position of the control panel by driving the rotary member, and a setting part for setting the angular position of the control panel in correspondence with the power status of the image processing apparatus.

Abstract: A system for acquiring the angular position of a gas twist grip in a motorcycle; the acquisition system is provided with a fixed supporting body; a rotating shaft turnable mounted in the supporting body; a transmission device mechanically connected to the gas twist grip and to the revolving shaft to transmit the motion of the gas twist grip to the revolving shaft itself; a main angular position sensor, which is carried by the supporting body, is coupled to the revolving shaft to determine the angular position of revolving shaft, and is adapted to provide two reciprocally redundant measures of the angular position of the revolving shaft; and an angular control position sensor, which is carried by the supporting body, is coupled to the revolving shaft to determine the angular position of the revolving shaft, and is adapted to provide two reciprocally redundant measures of the angular position of the revolving shaft.

Abstract: Disclosed is a method for regulating the braking force and/or driving force of a two-wheeled vehicle such as a motorcycle. According to said method, the rotating behavior of the vehicle wheels is determined by measuring the rotational speed while inclined positions of the vehicle are determined by measuring accelerations, and said rotating behavior and inclined positions are used for determining the controlled variables for a regulating intervention when the cruising stability is jeopardized. The inventive method is characterized in that the acceleration components that affect the vehicle are determined according to the amount and the direction thereof by measuring the acceleration at several predefined points of the vehicle and in several predefined directions, and said data is evaluated in order to determine the forces and force components that are applied to the contact surface of the vehicle tires in the x, y, and z direction, x representing the longitudinal direction, z representing the vertical axis, and y representing the axis that runs perpendicular to x and z, and recognize the angular position of the vehicle (angle of tilt λ, pitch angle ϕ) and/or the travel situation (e.g. lifting of a wheel, riding over a hump, etc.). A device for carrying out the disclosed method comprises a combined acceleration sensor (KBS) that is composed of four sensor elements which are disposed in a specific alignment along the longitudinal axis and the transversal axis of the vehicle.

Abstract: It is proposed a device for detecting the axial position and / or angular position of an in a housing (10, 11) movable relative to said body (12) carrying a permanent magnet arrangement (15). On or in the housing (10, 11) comprises a magnetic field-sensitive sensor arrangement (17) in the area of ​​influence of the magnetic field of the permanent magnet arrangement (15) is arranged. The body (12) is rotatable about its longitudinal axis in the housing (10, 11) and carries, at a certain rotational angle position, the permanent magnet arrangement (15). The sensor arrangement (17) consists of a plurality of annularly around the body (12) arranged around the sensors. In this way, the axial position and / or the angular position can be detected in a simple manner irrespective of the particular angular position of the body (12).

Abstract: A new type of a magnetic rotary encoder for servomotors is proposed. A salient feature of the proposed encoder is its small size, high resolution, and simple construction. An encoder based on the proposed method having a width of 10mm, a height of 10mm, and a depth of 3mm was developed and is reported here. In addition, the developed encoder has a high resolution of 4096ppr and is capable of detecting absolute angular position. The proposed encoder comprises of a disc magnet magnetized in one direction with all the magnetic domains in the material parallel to each other, a stationary body made up of a magnetically soft material, and four Hall effect devices. This paper describes the configuration of the encoder and the proposed detection process of the rotational position. The characteristics of the prototype encoder are also presented. The accuracy of the encoder depends on the distortion of a pseudo-sinusoidal output waveform, and therefore for achieving high accuracy the distortion of the output waveform should be minimal. The magnetic flux distribution and the output waveform of the encoder were simulated using finite element method (FEM). Based on FEM analysis, the optimal shape of the disc magnet and its housing, relative position of the Hall effect devices and the material of the disc magnet were determined to achieve high performance characteristics.

Abstract: A method of adjusting the speed of blades rotating in a rotor plane on a wind turbine, wherein the angle between at least two blades in the rotor plane is changed, whereby the tip speed of each individual blade can be optimised relative to the current speed of the wind experienced by the blade. Hereby it is possible to take into consideration the variation of the wind as a function of the height above ground level, and the yield of the wind turbine can be increased. The angular displacement of each blade can be changed individually independently of the remainder of the blades and cyclically. The method also comprises that each blade is accelerated on its way upwards in the rotation cycle and decelerated on its way down. Further details are provided about a system for controlling blades in a wind turbine comprising one or more wind speed meters, position meters, and/or acceleration meters, based on which parameters control of the angular displacement of each blade in the rotor plane is performed.

Abstract: A method for determining local departures of opposed friction surfaces that are spaced apart in parallel planes normal to the axis of the rotor. Displacement sensing probes are placed in opposing alignment adjacent the friction surfaces and rotor is spun. Instantaneous distances from each probe to the friction surfaces is made by repetitively sampling and converting the sample distances into digital form. The differences between contemporaneous sample distances are computed to determine rotor thicknesses and displayed. An analog measure of the instantaneous angular rotor position is provided for each instantaneous angular position. The angular rotor position and distance measures are correlated and the angular rotor position sample converted to digital form. While the time interval between successive distance samples is constant the rotor angular velocity may vary during a revolution and spline-based interpolation between successive distance samples is performed to obtain to obtain a representation of equiangularly spaced sample values.

Abstract: The invention provides an angular position detector that can be configured at low cost and that accurately detects the angular position of a rotor in a rotary electric device and permits reliable control thereof even when the rotary electric device runs at a high speed. The angular position detector includes a resolver that outputs a signal indicating the rotational angle of the rotor and a signal processing circuit that calculates the rotational angle of the rotor based on the signal output from the resolver. The signal processing circuit samples output signals from the resolver at predetermined intervals and converts the signal into a digital signal. By calculating the angular speed according to the digital signal output from the resolver, the computation process is simpler, and can be performed using a microcomputer with less processing power, which reduces the component costs for the angular position detector.

Abstract: The utility model relates to a universal spherical compensator, which belongs to the technical field of heating power pipe network pipeline apparatus. The utility model is mainly composed of a funnel-shaped main body, a ball body with a straight through inner hole, spherical face sealing rings and a pressing ring, wherein the sealing ring at least has two, and the sealing ring is composed of graphite, polytetrafluoroethylene and nylon which are pressed together. The ball body is supported in the inner chamber of the main body, an annular cavity between the sealing rings is filled up with graphite powder sealing agent and the lateral surface of the main body is provided with an injection hole. The utility model is used for heating power pipe network pipeline system, particularly a Z type pipeline. The utility model can make swing motion or rotation with an arbitrary angle, can carry out angular displacement of compensation of pipelines in a large range and can effectively compensate the pipeline linear displacement by absording the angular displacement. The utility model has the advantages of good sealing property, little deformation resistance, long service life, simple structure, easy fabrication and installation and low construction cost.

Abstract: A pointing device and method for providing both translational and rotational input to a computer, to manipulate graphical objects. In one embodiment, a pointing stick is cantilevered to a base. One or more translational sensors are coupled to the pointing stick to generate translational signals in response to lateral forces applied to the pointing stick. One or more rotational sensors are coupled to the pointing stick to generate rotational signals in response to rotational forces applied to the pointing stick. The rotational sensor may sense torque, such as with a piezoelectric sensor configured to detect rotational strain on a fixed pointing stick. The rotational sensor may alternatively sense rotational displacement, such as with a potentiometer configured to detect rotation of a rotatable sleeve about a fixed shaft.