scholarly journals Optimal Search on Navigation Equipment Troubleshooting Database

2016 ◽  
Author(s):  
Minghai Li ◽  
Tianwei Li ◽  
Hairui Ma ◽  
Su Wang ◽  
Yili Liu ◽  
...  
Keyword(s):  
Optimal Search ◽  
Navigation Equipment

On the feasible development of gimballess control systems for launch vehicles using GPS satellite navigation equipment

2015 ◽  
Vol 21 (6(97)) ◽  
pp. 3-12
Author(s):  
А.V. Degtyarev ◽  
◽  
M.A. Degtyarev ◽  
S.A. Davydenko ◽  
A.L. Makarov ◽  
...  
Keyword(s):  
Control Systems ◽  
Satellite Navigation ◽  
Launch Vehicles ◽  
Navigation Equipment

Optimal Search and Interdiction Planning

2014 ◽  
Author(s):  
Jesse Pietz ◽  
Johannes O. Royset
Keyword(s):  
Optimal Search

Experimental research of indoor navigation system based on broadcast signals

2020 ◽  
Vol 49 (5) ◽  
pp. 49-57
Author(s):  
A. V. Ksendzuk ◽  
E. A. Surmin ◽  
V. V. Kachesov ◽  
S. O. Zhdanov ◽  
K. S. Shakhalov
Keyword(s):  
Navigation System ◽  
Open Space ◽  
Position Estimation ◽  
Indoor Navigation ◽  
Estimation Accuracy ◽  
Satellite Systems ◽  
Indoor Navigation System ◽  
Point To Point ◽  
Navigation Signals ◽  
Navigation Equipment

Results of an experimental study of a local navigation system based on the processing signals from broadcast sources presented. The results of the development of processing algorithms for point-to-point coordinates estimation of the object are presented. The results of the development of algorithms for trajectories estimation are presented. In performed simulation the possibility of obtaining submeter position estimation accuracy in the proposed system is shown. Development results of the navigation module demonstrator are presented. The results of experimental work in difficult navigation conditions, in the presence of shading, reflections and other factors, are presented. It is shown that the developed navigation module allows in the open space near buildings which partially obscuring the satellite systems signals to obtain accuracy higher than the GNSS navigation equipment. In indoor environment in the absence of satellite navigation signals, the developed module shows positioning accuracy not worse than 1.5 meters and provides a measurement rate 1 Hz and better.

scholarly journals Designing Approximately Optimal Search on Matching Platforms

2021 ◽  
Author(s):  
Nicole Immorlica ◽  
Brendan Lucier ◽  
Vahideh Manshadi ◽  
Alexander Wei
Keyword(s):  
Optimal Search

scholarly journals A Method for Autonomous Navigation and Positioning of UAV Based on Electric Field Array Detection

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1146 ◽  
Author(s):  
Yincheng Li ◽  
Wenbin Zhang ◽  
Peng Li ◽  
Youhuan Ning ◽  
Chunguang Suo
Keyword(s):  
Mathematical Model ◽  
Power Systems ◽  
Transmission Lines ◽  
Autonomous Navigation ◽  
Strength Distribution ◽  
Field Source ◽  
Navigation Algorithm ◽  
Safety Warning ◽  
Positioning Algorithm ◽  
Navigation Equipment

At present, the method of using unmanned aerial vehicles (UAVs) with traditional navigation equipment for inspection of overhead transmission lines has the limitations of expensive sensors, difficult data processing, and vulnerable to weather and environmental factors, which cannot ensure the safety of UAV and power systems. Therefore, this paper establishes a mathematical model of spatial distribution of transmission lines to study the field strength distribution information around transmission lines. Based on this, research the navigation and positioning algorithm. The data collected by the positioning system are input into the mathematical model to complete the identification, positioning, and safety distance diagnosis of the field source. The detected data and processing results can provide reference for UAV obstacle avoidance navigation and safety warning. The experimental results show that the positioning effect of the positioning navigation algorithm is obvious, and the positioning error is within the range of use error and has good usability and application value.

scholarly journals Application of Measurement Sensors and Navigation Devices in Experimental Research of the Computer System for the Control of an Unmanned Ship Model

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1312 ◽  
Author(s):  
Tadeusz Szelangiewicz ◽  
Katarzyna Żelazny ◽  
Andrzej Antosik ◽  
Maciej Szelangiewicz
Keyword(s):  
Computer Program ◽  
Computer System ◽  
Autonomous Control ◽  
Maritime Transport ◽  
Control Software ◽  
Ship Model ◽  
Steering Characteristics ◽  
Unmanned Ship ◽  
Transport Vessel ◽  
Navigation Equipment

Unmanned autonomous transport vessels (MASS) are the future of maritime transport. The most important task in the design and construction of unmanned ships is to develop algorithms and a computer program for autonomous control. In order for such a computer program to properly control the ship (realizing various functions), the ship must be equipped with a computer system as well as measurement sensors and navigation devices, from which the recorded parameters are processed and used for autonomous control of the ship. Within the framework of conducted research on autonomous ships, an experimental model of an unmanned ship was built. This model was equipped with a propulsion system not commonly used on transport vessels (two azimuth stern thrusters and two bow tunnel thrusters), but providing excellent propulsion and steering characteristics. A complete computer system with the necessary measuring sensors and navigation devices has also been installed in the model of the ship, which enables it to perform all functions during autonomous control. The objective of the current research was to design and build a prototype computer system with the necessary measurement sensors and navigation devices with which to autonomously control the unmanned ship model. The designed computer system is expected to be optimal for planned tasks during control software tests. Tests carried out on open waters confirmed the correctness of the operation of the computer system and the entire measurement and navigation equipment of the built model of the unmanned transport vessel.

scholarly journals First Order Transition for the Optimal Search Time of Lévy Flights with Resetting

2014 ◽  
Vol 113 (22) ◽  
Author(s):  
Lukasz Kusmierz ◽  
Satya N. Majumdar ◽  
Sanjib Sabhapandit ◽  
Grégory Schehr
Keyword(s):  
Search Time ◽  
Order Transition ◽  
Optimal Search ◽  
Lévy Flights ◽  
First Order ◽  
Levy Flights ◽  
First Order Transition

Hybrid simulation of the Apollo guidance and navigation system

SIMULATION ◽  
1966 ◽  
Vol 7 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Madeline M. Sullivan
Keyword(s):  
Navigation System ◽  
Hybrid Simulation ◽  
Simulation Software ◽  
Space Environment ◽  
Massachusetts Institute Of Technology ◽  
Software Models ◽  
Digital Hardware ◽  
Institute Of Technology ◽  
Lift Off ◽  
Navigation Equipment

A hybrid simulation of the guidance and navigation system of the Apollo spacecraft is underway at the Massachusetts Institute of Technology Instrumentation Laboratory. The Apollo Guidance and Navigation equipment is digital, elec tronic, and electromechanical. The guidance and naviga tion analog and digital hardware is combined in simulation with analog and digital computers so that the hardware will be subjected to dynamic conditions approaching those found in a space environment. The instrumentation of the Apollo Guidance and Navi gation System is described as well as its adaptation to the hybrid simulation. Software models are discussed to indi cate some of the varied problems considered. Digital pro cedures which are designed to support the operator and enhance the reliability of the simulation are described. In conclusion, it becomes apparent that the judicious use of computers, together with guidance and navigation hardware and software, makes it possible to simulate in real time any part of the Apollo mission from lift-off to splash-down.

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