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Gyroscope

About: Gyroscope is a research topic. Over the lifetime, 17467 publications have been published within this topic receiving 159884 citations. The topic is also known as: gyroscopes.


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Patent
08 Aug 1990
TL;DR: In this paper, the sensitivity of the gyroscope to offsets introduced by the demodulator 17 is reduced by means of an optical phase modulator 8 to which first and second modulation signals are applied, and by a second demmodulator 19.
Abstract: In a fibre optic gyroscope, the sensitivity of the gyroscope to offsets introduced by the demodulator 17 is reduced by means of an optical phase modulator 8 to which first and second modulation signals are applied, and by a second demodulator 19. A generator 11 produces a waveform 12 of frequency 2/T where T is the transit time of light through the coil 2, and a chopper 14 operating at a lower frequency periodically inverts the waveform 12 to produce the phase modulation signal 15. Demodulator 17 operates at the generator frequency 2/T, and the second demodulator 19 operates at the chopper frequency and minimizes any offset from the first demodulator. A voltage controlled oscillator 31 generates a sawtooth signal 29 which is applied to phase modulator 9 to null the phase imbalance and determine the incremental angle or rate values.

2 citations

Patent
25 Apr 1990
TL;DR: In this article, a dynamically tuned gyroscope includes a combined pick-off and torquer assembly, which comprises an integrally formed pickoff support means (32) of castellated ring form having pole pieces (44); a plurality of preformed primary (34) and secondary (36, 38) pickoff coils mounted on said pole pieces; and a printed circuit board (43) having terminals (46) for the free ends of the coils or groups of coils.
Abstract: A dynamically tuned gyroscope includes a combined pick-off and torquer assembly. The assembly comprises an integrally formed pick-off support means (32) of castellated ring form having pole pieces (44); a plurality of preformed primary (34) and secondary (36; 38) pick-off coils mounted on said pole pieces; a plurality of torquer coils (40; 42); and a printed circuit board (43) having terminals (46) for the free ends of the coils or groups of coils (34, 36, 38).

2 citations

Journal ArticleDOI
TL;DR: A set of tuning fork gyroscopes were subjected to a series of increasing g-loads and failure of the die was observed in the form of fractures below the chip surface as well as fractures in the glass lid sealing the package.
Abstract: Military grade MEMS gyroscopes are critical for navigation in guided munitions. In such applications the sensor must survive extremely harsh launch environments and maintain integrity, often requiring sensitivity to loads many orders of magnitude lower than those experienced during launch. Previous inertial measurement units (IMUs) have proven to remain functional at loads up to 20,000 g’s [1]. In other work, gyroscopes (as well as other MEMS) have proven to survive loading up to 60,000 g’s [2]. In these previous works, performance was examined exclusively by electrical means. The current study aims to monitor the mechanical effects that such loading will have on the die and structure through interferometric shape measurement of the sensors.

2 citations

01 Jan 2000
TL;DR: In this paper, the existence of periodic solutions of motion of a gyrostat fixed at one point under the action of a central Newtonian force field, and a gyroscopic momentum similar to a Lagrange gyroscope is investigated.
Abstract: In this paper, the problem ofthe existence ofperiodic solutions of motion ofa gyrostatfixed at one point under the action ofa central Newtonian force field, and a gyrostatic momentum [i (i : 1,2,3; l1 : 42 = 0, {/3 ab O) similar to a Lagrange gyroscope is investigated. We assume that the center of mass G of this gyrostat is displaced by a small quantity relative to the axis of symmetry, and that quantity is used to obtain the small parameter 8 (Elfimov, 1978). The equations of motion will be studied under certain initial conditions ofmotion. The Poincaré small parameter method (Malkin, 1959; Nayy‘eh, 1973) is applied to obtain the periodic solutions of motion. The periodic solutions for the case of irrational frequencies ratio are given. The periodic solutions are geometrically interpreted to give the forms ofEuler angles.

2 citations

Patent
08 Jun 2016
TL;DR: In this paper, an empty amphibious unmanned aerial vehicle (UAV) of water, central controller, actuating system, counter weight system and camera system, the camera system includes camera motor, camera and video analyzer, and the camera motor is connected through the wire with central controller.
Abstract: The utility model discloses an empty amphibious unmanned aerial vehicle control system of water, central controller, actuating system, counter weight system and camera system, the actuating system includes motor power, gyroscope and accelerometer, the camera system includes camera motor, camera and video analyzer, and the camera motor is connected through the wire with central controller, and the camera is connected with the video analyzer through the wire, the counter weight system includes pump motor, immersible pump and flowmeter, central controller is last still to be connected with ultrasound positioning appearance and wireless transceiver module through the wire respectively. The utility model discloses can control the empty amphibious unmanned aerial vehicle of water, make its water, empty gesture conversion in a flexible way stably, the operation is reliable.

2 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023490
20221,102
2021484
2020893
20191,134
20181,236