The Gyroscopic Stabilization of Land Vehicles

Nature ◽  
1934 ◽  
Vol 133 (3359) ◽  
pp. 400-400
2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Huisheng Liu ◽  
Zengcai Wang ◽  
Susu Fang ◽  
Chao Li

A constrained low-cost SINS/OD filter aided with magnetometer is proposed in this paper. The filter is designed to provide a land vehicle navigation solution by fusing the measurements of the microelectromechanical systems based inertial measurement unit (MEMS IMU), the magnetometer (MAG), and the velocity measurement from odometer (OD). First, accelerometer and magnetometer integrated algorithm is studied to stabilize the attitude angle. Next, a SINS/OD/MAG integrated navigation system is designed and simulated, using an adaptive Kalman filter (AKF). It is shown that the accuracy of the integrated navigation system will be implemented to some extent. The field-test shows that the azimuth misalignment angle will diminish to less than 1°. Finally, an outliers detection algorithm is studied to estimate the velocity measurement bias of the odometer. The experimental results show the enhancement in restraining observation outliers that improves the precision of the integrated navigation system.


1987 ◽  
Vol 40 (3) ◽  
pp. 322-333 ◽  
Author(s):  
Andrew Stratton

Omega is one of a wide range of navigational aids that have been developed and are in everyday use by ships and aircraft. By contrast, outside the military field as yet there has been no significant application of these aids to mobile land vehicles. The reason has been a mismatch between the perceived accuracy requirements of the potential user, what he is prepared to pay, and what technology could provide.


2018 ◽  
Vol 12 (8) ◽  
pp. 1121-1132 ◽  
Author(s):  
Berkan Solmaz ◽  
Erhan Gundogdu ◽  
Veysel Yucesoy ◽  
Aykut Koç ◽  
Abdullah Aydin Alatan

2018 ◽  
Vol 11 (30) ◽  
pp. 1-11
Author(s):  
Gomez N. Mario A. ◽  
Camargo L. Julian R. ◽  
Perdomo Ch Cesar A. ◽  
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2013 ◽  
Vol 20 (1) ◽  
pp. 85-96 ◽  
Author(s):  
Byung-Hyun Lee ◽  
Gyu-In Jee

ABSTRACT For ITS (Intelligent Transport Systems), especially for land vehicles, precise position is the prime information. GNSS is the most popular navigation system. Generally, ITS demands lane distinguishable positioning accuracy. However urban area is most environments of land vehicles and the signal blocks of satellite with low elevation angle, multipath error and etc. make unreliable positioning results. Especially, lack of number of visible satellites (fewer than 4 satellites) cannot provide positioning results. QZSS (Quasi-Zenith Satellite System) which operated by Japan has high interoperability. In addition, its elevation angle is very high in long time in Korea. It means QZSS signal can be received in urban area and it can be great advantage for land vehicles. The most positioning errors are occurred by multipath, cycle slip, and etc. For example, multipath error is unexpected momentary error. In order to reduce position error, smoothing technique in position domain is needed. In this paper, precise positioning for land vehicles was evaluated. First, by using QZSS, probability of navigation solution was enhanced. Second, the reliability is improved by smoothing positioning result using Doppler measurement. The analysis was performed by trajectory analysis using precise map data.


2014 ◽  
Vol 22 (2) ◽  
Author(s):  
Norliah Ibrahim ◽  
Zuhairah Ariff Abd Ghadas

Traditionally, the claims of matrimonial property are mainly confined to existing and personal property which exist or were acquired during the marriage prior to the divorce, such as buildings, land, vehicles, etc. However, with the changes in the economic sources and social behaviour of the modern society, whereby earnings and proprietary rights are no longer confined to merely property but also include future interest and future earnings such as investments, trust fund and business ventures, it is perceived that the scope of claims on matrimonial property shall also be revolutionised to include claims in future earnings of the divorced parties.This paper discusses the legal principle which the court could apply when it comes to claims on future interest as matrimonial property. The case law analysis is merely confined to the Malaysian precedents and the analogy of human capital earning is used by the writers to justify the possibility of claims in all types of future earnings as matrimonial property.


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