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Inertial reference unit

About: Inertial reference unit is a research topic. Over the lifetime, 1306 publications have been published within this topic receiving 22068 citations. The topic is also known as: IRU.


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Journal Article
TL;DR: The equations and algorithms of strapdown navigation system are derived and analysed and the research is focused on the calculation methods of the aircraft attitude.
Abstract: Almost all aircraft are equipped with the Inertial Navigation Systems. The autonomous Inertial Systems are capable of calculating the navigational parameters of aircraft: position, velocity, and attitude, without external sources of information. In the paper the equations and algorithms of strapdown navigation system are derived and analysed. The research is focused on the calculation methods of the aircraft attitude.

19 citations

Proceedings ArticleDOI
17 Jul 2013
TL;DR: An autonomous free-inertial gravity gradiometer integrated aircraft navigation system is promulgated and the accurate mapping of the gravity field along the aircraft's flight path is an added benefit.
Abstract: In high precision inertial navigation, gravity field modeling error becomes a limiting factor. Granted that high precision accelerometers are used, airborne gravity gradiometry can be employed in a self-contained way to accurately estimate the gravity field on the fly and eliminate the gravity field modeling error. The local acceleration of gravity will be estimated using the onboard accelerometer measurements, provided that the acceleration measurements are very accurate, as is the case in high precision INS using cold atom interferometry-based accelerometers. An autonomous free-inertial gravity gradiometer integrated aircraft navigation system is promulgated. The accurate mapping of the gravity field along the aircraft's flight path is an added benefit.

19 citations

Patent
Charles D Bock1
01 Jun 1961

19 citations

Journal ArticleDOI
TL;DR: In this paper, a robust design scheme for an inertial measurement unit (IMU) composed only of accelerometers is presented, which can estimate the linear acceleration, angular velocity, and angular acceleration of the rigid-body to which it is attached.
Abstract: This paper presents a robust design scheme for an inertial measurement unit (IMU) composed only of accelerometers. From acceleration data measured by a redundant set of accelerometers, the IMU proposed in this paper can estimate the linear acceleration, angular velocity, and angular acceleration of the rigid-body to which it is attached. The robustness of our method to the uncertainty of the locations of the sensors and the measurement noise is obtained through redundancy and optimal configuration of the onboard sensors. In addition, the fail-diagnostics and fail-safe issues are also addressed for reliable operation.

18 citations

Proceedings ArticleDOI
01 Oct 2012
TL;DR: In this paper, the authors used an inertial sensor, which provides triaxial accelerometers and gyroscopes, RF capability and 2GB on-board memory in a waterproof casing to investigate the arm symmetry in freestyle swimming.
Abstract: This research used an sacrum mounted self developed inertial sensor, which provides triaxial accelerometers and gyroscopes, RF capability and 2GB on-board memory in a waterproof casing to investigate the arm symmetry in freestyle swimming. The recorded acceleration data was filtered using a high-pass Hamming windowed FIR filter to remove the sensor orientation from the wanted signal. The signal was then analyzed using a zero-crossing detection algorithm to find the individual stroke rates (SR) and the differences between left and right arm stroke durations (asymmetry).

18 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202314
202221
20211
20202
20193
20189