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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.


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Patent
04 Aug 1982
TL;DR: A transducer for sensing the angular position or rate of change of displacement of a housing of a borehole survey instrument with respect to a reference position is described in this article.
Abstract: A transducer for sensing the angular position or rate of change of displacement of a housing of a borehole survey instrument with respect to a reference position includes a rotor magnetically suspended within a stator which is in turn secured to the housing. The rotor is constrained by the magnetic suspension to rotate about a single axis relative to the stator. A frame of reference is established for the transducer, against which subsequent measurements are compared. Optical sensing means are included for sensing the movement of the rotor about the axis of motion to develop an indication of the angular position or rate of change of position of the housing.

21 citations

Patent
14 Jan 1994
TL;DR: In this paper, the authors present a vertical reference that includes sensors providing signals indicative of angular tilt from the predetermined reference axis and the rate of angular tilings; an integrator to integrate the angular rate signal to provide a dynamic angular tilt signal; a pendulum to indicate angular displacement relative to the predetermined axis; a first amplifier for filtering and amplifying the angular displacement signal to produce a first amplified signal, a second amplifier and a dual input amplifier for combining the first and second amplified signals to produce an output signal indicative of vertical reference and attitude.
Abstract: The present invention provides a vertical reference that includes sensors providing signals indicative of angular tilt from the predetermined reference axis and the rate of angular tilt; an integrator to integrate the angular rate signal to provide a dynamic angular tilt signal; a pendulum to provide a signal indicative of angular displacement relative to the predetermined axis; a first amplifier for filtering and amplifying the dynamic angular tilt signal and the angular displacement signal to produce a first amplified signal; a second amplifier for filtering and amplifying the dynamic angular tilt signal and the angular displacement signal to produce a second amplified signal; and a dual input amplifier for combining and amplifying the first and second amplified signals to produce an output signal indicative of vertical reference and attitude. In another embodiment of the present invention a vertical reference apparatus includes a cascaded second-order filter or control loop having a first second-order loop that receives its inputs from the pendulum and the angular rate sensor and a second second-order loop that receives as its inputs the output signal of the first loop and the angular rate sensor. The output of the second loop is provided to a control system for the structure whose orientation is desired to be measured or stabilized. In this alternative embodiment of the present invention each control loop includes a summing amplifier, a summing damped integrator, an inverting amplifier, and an integrator.

21 citations

Patent
27 Dec 1979
TL;DR: A rotational position signal developed during each weaving cycle of the loom is compared with the reference signal to issue a rotational angle signal indicating an angle through which the loom has been rotated with respect to a reference angular position.
Abstract: A method and an apparatus for controlling operation of at least one operating element of a loom on the basis of a reference signal are disclosed. A rotational position signal developed during each weaving cycle of the loom is compared with the reference signal to issue a rotational angle signal indicating an angle through which the loom has been rotated with respect to a reference angular position. By utilizing this rotational angle signal, the timing of the operation of any operating element can be determined.

21 citations

Patent
10 Jul 1991
TL;DR: In this article, a balance machine for motor vehicle wheels clamped to the main shaft of the machine contains a sensing device for distance measurement of the balance plane or planes and for detecting the balance radius.
Abstract: The balancing machine for motor vehicle wheels clamped to the main shaft of the machine contains a sensing device for distance measurement of the balance plane or planes and for detecting the balance radius. The sensing element has a retractable organ (10, 11, 17) in a common plane with the main shafts axis. The sensor provides electrical signals corresp. to the measured values to a device which evaluates the imbalance values measured during one or more measurement processes. The sensor has an angle measurement device (24) which measures the angular position of the sensing organ or its parts to determine the balance radius. ADVANTAGE - Ensures accurate position determination for each balance wt. on wheel rim.

21 citations

Patent
06 Jul 2004
TL;DR: In this article, the amplitude and phase of a belt AC component of the angular displacement or angular speed, having frequency corresponding to thickness variation of the belt, is extracted by orthogonal detection in a belt cycle variation sensing station.
Abstract: PROBLEM TO BE SOLVED: To provide a belt drive control unit capable of accurately extracting amplitude and phase of an AC component, corresponding to thickness variation in a peripheral direction of a belt with a processing unit which is less expensive than Fourier transform, and to provide a belt device and an image forming apparatus. SOLUTION: Angular displacement or angular speed of a driven roller 14 is detected in an encoder rotation sensing station 610, and from the detection result, amplitude/phase of a belt AC component of the angular displacement or angular speed, having frequency corresponding to thickness variation of a belt, is extracted by orthogonal detection in a belt cycle variation sensing station 608. On the basis of the extracted amplitude and phase, an objective function is produced in an objective function calculating part 607, and from this objective function, an objective reference signal is produced in an objective reference signal producing part 606. The objective reference signal is compared by a comparator 605, with an FB signal from the detection result obtained in the encoder rotation sensing station 610; and by controlling a motor 17 on the basis of the comparison result, the rotation of the driven roller is controlled. COPYRIGHT: (C)2006,JPO&NCIPI

21 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202339
202282
2021106
2020164
2019224
2018212