scholarly journals HYBRID GPS/SINS SYSTEM - AN OVERVIEW

2020 ◽  
Vol 19 (2) ◽  
pp. 137
Author(s):  
Milan Andrejević ◽  
Aleksandra Milovanović ◽  
Saša S. Nikolić
Keyword(s):  
Navigation System ◽  
Current Trend ◽  
Navigation Systems ◽  
Gps Receiver ◽  
Closing Time ◽  
Gps Navigation ◽  
Receiving Antenna ◽  
Navigation Information ◽  
A Current

This paper describes a hybrid navigation system consisting of an integrated GPS/INS system. The integration of the navigation systems has been performed to improve the accuracy of the navigation parameters and it is a current trend in the world. The need for continuous navigation, during the change of position of the GPS receiver, during the closing time of the GPS receiving antenna, and during the appearance of interference, has imposed a solution that is achieved by the integration of GPS / INS. The role of SINS, which is part of the integrated GPS / INS navigation system, is to determine the navigation parameters at intervals between two adjacent measurements of GPS receivers, i.e., at times when there is no GPS navigation information for any reason. In this way, GPS and INS, when used together, complement and correct each other, significantly increasing the reliability and accuracy of the hybrid navigation system.

Studies of the integrated navigation system correction in the absence of a satellite signal

2021 ◽  
Author(s):  
Keyword(s):  
Kalman Filter ◽  
Navigation System ◽  
Operation Mode ◽  
Satellite System ◽  
Navigation Systems ◽  
Integrated Navigation ◽  
Integrated Navigation System ◽  
Correction Signal ◽  
Satellite Signal ◽  
Navigation Information

The schemes of navigation systems correction are considered. The operation mode of the aircraft during navigation is analyzed. An adaptive modification of the linear Kalman filter is used to correct the navigation information. An algorithm for predicting a correction signal based on a neural network in the event of a loss of a SNS correction signal is formed. Experimental results show the effectiveness of the algorithm. Keywords aircraft; inertial navigation system; satellite system; Kalman filter; neural networks; genetic algorithm

Mathematical Modelling of Indian Regional Navigation Satellite System Receiver

2017 ◽  
Vol 67 (4) ◽  
pp. 443 ◽  
Author(s):  
S. Naveen Pitchumani ◽  
S. Arun Sundar ◽  
T. Srinivasan ◽  
S. Savithri
Keyword(s):  
Navigation System ◽  
Satellite System ◽  
Signal Acquisition ◽  
Navigation Satellite ◽  
Navigation Systems ◽  
Code Tracking ◽  
Delay Locked Loop ◽  
Gps Navigation ◽  
Interface Control ◽  
Global Positioning

<p class="p1">At present the armoured fighting vehicles are equipped with either global positioning system (GPS) receivers or integrated inertial navigation system (INS)/GPS navigation systems. During hostile situations, the denial/degradation of the GPS satellite signals may happen. This results in the requirement of an indigenous satellite based navigation system. Indian Space Research Organisation has developed an indigenous Indian regional navigation satellite system (IRNSS), with a seven satellite constellation to provide independent position, navigation and timing services over India and its neighbouring regions. In this paper, the development of IRNSS receiver using MATLAB as per IRNSS signal in space interface control document for standard positioning service is discussed. A method for faster IRNSS signal acquisition in frequency domain and delay locked loop code tracking for the acquired satellite signals are used. Models for navigation message decoding and pseudo range/user position calculations are developed using the algorithms provided in IRNSS ICD.</p>

A Ship GPS/DR Integrated Navigation System

2012 ◽  
Vol 591-593 ◽  
pp. 1818-1821
Author(s):  
Yuan Liang Zhang
Keyword(s):  
Data Fusion ◽  
Navigation System ◽  
Global Economy ◽  
Dead Reckoning ◽  
Fusion Method ◽  
Integrated Navigation ◽  
Gps Receiver ◽  
Integrated Navigation System ◽  
Ship Navigation ◽  
Navigation Information

The development of the global economy stimulates the exploitation of the ocean. A precise and stable ship navigation system is very important for people to explore the ocean. Dead reckoning (DR) system is a frequently used navigation system for sailing in the ocean. It can provide precise short term navigation information but the error of DR system can accumulate over time without limitation. GPS can be used for localization and navigation in outside environment. Although the SA policy was removed the accuracy of GPS for civilian use is still big. But the errors of GPS are bounded. Since the complementarity of DR and GPS system the integrated GPS/DR system can provide good navigation results. In this paper a new Kalman filter based DR/GPS data fusion method is proposed. This method is designed based on the characteristic of the GPS receiver. By using this data fusion method the cheap GPS receiver can cooperate with DR system to provide precise navigation information for ships. Simulation is conducted to validate the proposed fusion method. The good result shows the potential of this fusion method for the ship navigation.

The Path Forward: The Role of Hospitals and Health Systems in Advancing Health and Well-Being for Individuals and Communities

2019 ◽  
pp. 67-74
Author(s):  
Jay Bhatt ◽  
Andrew Jagar
Keyword(s):  
Health Systems ◽  
Current Trend ◽  
Well Being ◽  
The United States ◽  
Models Of Care ◽  
New Models ◽  
Health And Well Being ◽  
A Current ◽  
True Population

This chapter starts by explaining a current trend in the transformation of the role of hospitals in advancing health in the community. The change is the result of demographic change and disease burden shifts which are moving away from acute to chronic. And hospitals and health systems are, as a result, leading an unprecedented transformation to re-envision their role and extend their impact beyond the clinic walls. They are working to create new models of care that prioritize teaming and partnership with the aim of engaging in true population health: advancing health and well-being by bridging care and community. The key, the chapter argues, is to promote affordability while enhancing value. The chapter concludes by stating that hospitals and health systems play an important role in the health of communities across the United States. While that role is changing and will likely continue to evolve, the importance of these institutions as anchors in their communities is likely to increase in coming years.

scholarly journals Employers and Employers Associations in the Netherlands Industrial Relations Systems

2005 ◽  
Vol 22 (1) ◽  
pp. 47-73
Author(s):  
John P. Windmuller
Keyword(s):  
Decision Making ◽  
The Netherlands ◽  
Industrial Relations ◽  
Current Trend ◽  
Economic Policies ◽  
Dutch Government ◽  
Social Organizations ◽  
High Degree ◽  
A Current

This article analyzes the organization of employers in the Netheriands for their industrial relations tasks. After first describing the role of individual employers and explaining why that role is a relatively small one, the article emphasizes the structure and functioning of employers associations in industrial relations. Special attention is given to the existence of pluralistic associations in a country where by tradition most if not all social organizations are pluralistically organized. The postwar wage and economic policies of the Dutch government have encouraged a high degree of centralized decision-making among employers as well as among labor organizations. The article concludes with some observations about the likely consequences of a current trend toward greater decentralization.

scholarly journals A Pragmatic Approach to the Design of Advanced Precision Terrain Aided Navigation for UAVs and Its Verification

2020 ◽  
Author(s):  
Jungshin Lee ◽  
Chang-Ky Sung ◽  
Juhyun Oh ◽  
Kyungjun Han ◽  
Sangwoo Lee ◽  
...  
Keyword(s):  
Navigation System ◽  
Graphics Processing Units ◽  
Satellite System ◽  
General Purpose ◽  
Navigation Systems ◽  
Integrated Navigation ◽  
Radar Altimeter ◽  
Computing Technique ◽  
Integrated Navigation System ◽  
Navigation Information

Autonomous unmanned aerial vehicles (UAVs) require highly reliable navigation information. Generally, navigation systems with the inertial navigation system (INS) and global navigation satellite system (GNSS) have been widely used. However, the GNSS is vulnerable to jamming and spoofing. The terrain referenced navigation (TRN) technique can be used to solve this problem. In this study, to obtain reliable navigation information even if a GNSS is not available or the degree of terrain roughness is not determined, we propose a federated filter based INS/GNSS/TRN integrated navigation system. we also introduce a TRN system that combines batch processing and an auxiliary particle filter to ensure stable flight of UAVs even in a long-term GNSS-denied environment. As an altimeter sensor for the TRN system, we use an interferometric radar altimeter (IRA) to obtain reliable navigation accuracy in high altitude flight. In addition, a parallel computing technique with general-purpose computing on graphics processing units (GPGPU) is applied to process a high resolution terrain database and a nonlinear filter in real time on board. Finally, we verify the performance of the proposed system through software-in-the-loop (SIL) tests and captive flight tests in a GNSS unavailable environment.

scholarly journals Research of parameters and calculation of the budget of the radio line in the ground-based system of near navigation on the basis of pseudo-satellites

2019 ◽  
pp. 101-106
Author(s):  
R. B. Kovalyov ◽  
V. N. Ratushnyak ◽  
P. Yu. Zverev
Keyword(s):  
Navigation System ◽  
Noise Immunity ◽  
Navigation Systems ◽  
Radio Lines ◽  
Directional Diagram ◽  
Energy Characteristics ◽  
Satellite Systems ◽  
Radio Line ◽  
Navigation Signals ◽  
Navigation Information

At present time the most of the work of specialists in the field of navigation is to improve the parameters of navigation systems such as noise immunity and accuracy. At all the world is more and more actual the interest of consumers of high-precision navigation information and equipment manufacturers to near navigation systems, which are an addition to the existing satellite radio navigation systems, allowing them to increase their accuracy and noise immunity. Assessment the parameters is made in the article and algorithm for calculating the radio line in the near-navigation system based on pseudosatellites is generalized. A model for calculating the energy of a radio line has been developed for various configurations of the location of pseudosatellites. The developed program for calculating the characteristics of radio lines of a near-navigation system based on pseudo-satellites allows to quickly evaluate not only its energy characteristics, but also realizes pictorial visualization of the resulting directional diagram of pseudo-satellite systems in accordance with the configured navigation zone of consumers and the required power of navigation signals in natural radio routes.

Robot Navigation Using a DR/GPS Data Fusion

2013 ◽  
Vol 392 ◽  
pp. 261-266 ◽  
Author(s):  
Yuan Liang Zhang ◽  
Jong Ho Park ◽  
Nam O Sel ◽  
Kil To Chong
Keyword(s):  
Data Fusion ◽  
Mobile Robot ◽  
Navigation System ◽  
Robot Navigation ◽  
Mobile Robot Navigation ◽  
Gps Data ◽  
Fusion Method ◽  
Gps Receiver ◽  
Differential Gps ◽  
Navigation Information

Dead Reckoning (DR) is one of the frequently used navigation system for a mobile robot. It provides short term navigation information but its error can accumulate over time without limit. The Global Positioning System (GPS) can be used for localization and navigation outdoors wherein the removal of the SA Policy improved the accuracy of the GPS for civilian use but the error is still quite large. Standard Differential GPS (DGPS) can be used to achieve an error of less than one meter but the costs are prohibitive in terms of commercializing it into the mass market. In this research study, a cheap GPS receiver was used for the navigation system of a mobile robot outdoors in which a new Kalman-filter based DR/GPS data fusion method was utilized. This proposed method is based on the characteristics of the GPS receiver. Fusing the data from the GPS receiver and the DR system provided precise navigation information for the mobile robot. Simulation was performed to check and validate the effectiveness of the proposed fusion method and good results showed its potential for mobile robot navigation outdoors.

scholarly journals A Pragmatic Approach to the Design of Advanced Precision Terrain-Aided Navigation for UAVs and Its Verification

2020 ◽  
Vol 12 (9) ◽  
pp. 1396
Author(s):  
Jungshin Lee ◽  
Chang-Ky Sung ◽  
Juhyun Oh ◽  
Kyungjun Han ◽  
Sangwoo Lee ◽  
...  
Keyword(s):  
Navigation System ◽  
Graphics Processing Units ◽  
Satellite System ◽  
General Purpose ◽  
Navigation Systems ◽  
Integrated Navigation ◽  
Radar Altimeter ◽  
Computing Technique ◽  
Integrated Navigation System ◽  
Navigation Information

Autonomous unmanned aerial vehicles (UAVs) require highly reliable navigation information. Generally, navigation systems with the inertial navigation system (INS) and global navigation satellite system (GNSS) have been widely used. However, the GNSS is vulnerable to jamming and spoofing. The terrain referenced navigation (TRN) technique can be used to solve this problem. In this study, to obtain reliable navigation information even if a GNSS is not available or the degree of terrain roughness is not determined, we propose a federated filter based INS/GNSS/TRN integrated navigation system. We also introduce a TRN system that combines batch processing and an auxiliary particle filter to ensure stable flight of UAVs even in a long-term GNSS-denied environment. As an altimeter sensor for the TRN system, an interferometric radar altimeter (IRA) is used to obtain reliable navigation accuracy in high altitude flight. In addition, a parallel computing technique with general purpose computing on graphics processing units (GPGPU) is applied to process a high resolution terrain database and a nonlinear filter in real-time on board. Finally, the performance of the proposed system is verified through software-in-the-loop (SIL) tests and captive flight tests in a GNSS unavailable environment.

Utilisation of Robotic Navigation Systems in the Treatment of Atrial Fibrillation

2010 ◽  
Vol 6 (3) ◽  
pp. 60
Author(s):  
Richard Schilling ◽  
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
Navigation System ◽  
Antiarrhythmic Drugs ◽  
Rhythm Control ◽  
Navigation Systems ◽  
Robotic Navigation ◽  
Increased Risk ◽  
Common Strategy ◽  
Catheter Navigation

Atrial fibrillation (AF) is linked to an increased risk of adverse cardiovascular events. While rhythm control with antiarrhythmic drugs (AADs) is a common strategy for managing patients with AF, catheter ablation may be a more efficacious and safer alternative to AADs for sinus rhythm control. Conventional catheter ablation has been associated with challenges during the arrhythmia mapping and ablation stages; however, the introduction of two remote catheter navigation systems (a robotic and a magnetic navigation system) may potentially overcome these challenges. Initial clinical experience with the robotic navigation system suggests that it offers similar procedural times, efficacy and safety to conventional manual ablation. Furthermore, it has been associated with reduced fluoroscopy exposure to the patient and the operator as well as a shorter fluoroscopy time compared with conventional catheter ablation. In the future, the remote navigation systems may become routinely used for complex catheter ablation procedures.

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