Topic
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•
16 Mar 2005
TL;DR: In this paper, a rotational symmetric precision part was measured with a rotating centering means and a dog, drivable via a drive, and a revolving centering mean, and software means were provided to determine slip between the dog and the rotational precision part through a comparative calculation.
Abstract: A device for measuring a rotationally symmetric precision part, having a dog, drivable via a drive, and a revolving centering means, the dog and the revolving centering means being positioned in such a way that a rotationally symmetric precision part to be measured may be non-positively clamped coaxially between dog and centering means. A first angle measuring system is assigned to the dog, which provides signals that permit the drive-side angular position of the dog to be stated, and a further angle measuring system is assigned to the revolving centering means, which provides signals that permit the output-side angular position of the centering means to be stated. Software means are provided which determine slip between the dog and the rotationally symmetric precision part through a comparative calculation on the basis of the drive-side angular position and the output-side angular position.
14 citations
Patent•
13 Jun 2012
TL;DR: In this paper, the authors proposed a method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload, which comprises the steps of measuring linear acceleration and utilizing the amplification effect generated by twice integration of high frequency signal, thus realizing high accuracy measurement at low cost.
Abstract: The invention relates to a method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload. The method comprises the steps of measuring linear acceleration and utilizing the amplification effect generated by twice integration of a high frequency signal, thus realizing high accuracy measurement at low cost. Analysis shows that an acceleration meter with the accuracy of 10-4g can be adopted for 50Hz angular displacement with the amplitude of 10-6 degrees under the condition of a 1m reference line, thus greatly reducing the accuracy of an instrument and reducing the measurement cost. The invention provides a method for measuring the vibration quantity under two conditions of full time and time window.
14 citations
Patent•
04 Nov 1992
TL;DR: An angular displacement sensor for limited angle applications (e.g., for sensing automotive throttle positions) comprising first (14) and second (16) relatively rotatable components arranged to confront each other axially is presented in this paper.
Abstract: An angular displacement sensor for limited angle applications (e.g., for sensing automotive throttle positions) comprising first (14) and second (16) relatively rotatable components arranged to confront each other axially. The first component (14) provides a plurality of poles (14A, B, C) which are angularly disposed about the rotation axis and extend towards the second component. These poles (14A, B, C) have axes which extend in the same direction as the rotation axis. Some poles have windings (14A, B), while others (14B) provide flux return paths. The second component comprises an inductance affecting component (16) which overlies only some of the wound poles at any given time, the relative rotation varying the poles which are overlaid. The sensor includes an output unit (17) for providing output signal data related to the inductances of the excitation poles and thus related to the rotary configuration of the components.
14 citations
TL;DR: In this paper, the geometric effects of our galaxy's peculiar motion on the circles-in-the-sky were studied and an explicit expression for the radius and center position of such an observed circle in the sky, as well as the angular displacement of points on the circle, were derived.
Abstract: We study the geometric effects of our galaxy's peculiar motion on the circles-in-the-sky. We show that the shape of these circles-in-the-sky remains circular, as detected by a local observer with arbitrary peculiar velocity. Explicit expressions for the radius and center position of such an observed circle-in-the-sky, as well as for the angular displacement of points on the circle, are derived. In general, a circle is detected as a circle of different radius, displaced relative to its original position, and centered at a point which does not correspond to its detected center in the comoving frame. Further, there is an angular displacement of points on the circles. These effects all arise from aberration of cosmic microwave background radiation, exhausting the purely geometric effects due to the peculiar motion of our galaxy, and are independent of both the large scale curvature of space and the expansion of the universe, since aberration is a purely local phenomenon. For a Lorentz-boosted observer with the speed of our entire galaxy, the maximum (detectable) changes in the angular radius of a circle, its maximum center displacement, as well as the maximum angular distortion are shown all to be of order $\beta=(v/c)$ radians. In particular, two back-to-back matching circles in a finite universe will have an upper bound of $2|\beta|$ in the variation of either their radii, the angular position of their centers, or the angular distribution of points.
14 citations
Patent•
27 Apr 2005
TL;DR: In this paper, the angular displacement grating sensor sends two pulses in each turn of the pulley, with each pulse period corresponding to a certain length; the pulse signal is real-time received and processed in the operating and processing part; and the current depth is shown in the display.
Abstract: The depth measuring instrument includes measuring rope for reaching the measured body, pulley, angular displacement grating sensor, operating and processing part and display. The measuring rope includes local surface of the pulley, the pulley is linked with the photoelectric code disc of the angular displacement grating sensor; the angular displacement grating sensor sends two pulse signal in each turn of the pulley, with each pulse period corresponding to certain length; the pulse signal is real-time received and processed in the operating and processing part; and the current depth is shown in the display. The present invention is used in measuring well depth, base depth, etc. and has the advantages of good real-time property, high precision, high efficiency, etc.
14 citations