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Calibration of an HMPD-Based Augmented Reality System
2007
IEEE transactions on systems, man and cybernetics. Part A. Systems and humans
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Following a concise review of the HMPD concept and our system configuration, we first present a computational model of the HMPD viewing system and requirements for the system calibration. ...
The size, depth, and geometry, as well as the physical attributes of the virtual object, have to be rendered precisely relative to a physical reference. ...
ACKNOWLEDGMENT The authors would like to thank 3M Inc. for supplying the retro-reflective films and L. D. Brown for his work on developing the testbed applications. ...
doi:10.1109/tsmca.2007.893471
fatcat:edcbp3lrfffrpj3qfqssboj46y
A Virtual Vertical Reference Concept for GNSS/INS Applications at the Sea Surface
2015
IFAC-PapersOnLine
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Inertial navigation systems can be used to obtain estimates of the position, velocity and attitude, in a dead-reckoning fashion, for marine vessels. ...
This paper presents an alternative vertical aiding by introducing a virtual vertical reference concept with respect to uncoupled and loosely coupled GNSS/INS integration, which improves the accuracy of ...
Aiden Morrison, SINTEF ICT for valuable discussions on GNSS systems. ...
doi:10.1016/j.ifacol.2015.10.269
fatcat:hxzf47rri5czvp6m2nit6bszda
Differential GNSS and Vision-Based Tracking to Improve Navigation Performance in Cooperative Multi-UAV Systems
2016
Sensors
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problem of finding the tilt and the heading quaternion with an improvement in attitude estimation. ...
The authors assume an attitude accuracy requirement of 1.0 • on pitch and roll and 4.0 • on heading, as required by industry for a fixed wing aircraft [10]. ...
Accardo and A. Moccia supervised the work contributing to software development and data analysis and interpretation, and revised the paper. ...
doi:10.3390/s16122164
pmid:27999318
pmcid:PMC5191143
fatcat:jo6sdjxahrdjdprytaejoql33u
Automatic re-initialization and failure recovery for aggressive flight with a monocular vision-based quadrotor
2015
2015 IEEE International Conference on Robotics and Automation (ICRA)
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When this happens, the robot should automatically re-initialize the state estimate to maintain its autonomy and, thus, guarantee the safety for itself and the environment. ...
In addition, any vision-based state estimator can fail due to the lack of visual information in the scene or due to the loss of feature tracking after an aggressive maneuver. ...
The IMU-based attitude estimate is used for control during stages 1, 2, and 3. During stages 4 and 5, the attitude estimate from MSF is used for feedback control. ...
doi:10.1109/icra.2015.7139420
dblp:conf/icra/FaesslerFFS15
fatcat:az5sdroy75dujguxsnvi7yazma
Modeling visual-based pitch, lift and speed control strategies in hoverflies
2018
PLoS Computational Biology
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This model would provide a useful tool for understanding more clearly how insects may or not estimate their absolute attitude. ...
Since graviceptive cues are possibly not used by flying insects, the use of a vertical reference to control the pitch is discussed, based on the results obtained on a complete dynamic model of a virtual ...
was based, and to Jessica Blanc for correcting and improving the English in the manuscript. ...
doi:10.1371/journal.pcbi.1005894
pmid:29361632
pmcid:PMC5780187
fatcat:fgzsvuxrdzgqvk23cbfvlpc46i
A New Perspective on Low-Cost MEMS-Based AHRS Determination
2021
Sensors
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Attitude and heading reference system (AHRS) is the term used to describe a rigid body's angular orientation in three-dimensional space. ...
This paper describes an AHRS determination and control system developed for navigation systems by integrating gyroscopes, accelerometers, and magnetometers signals from low-cost MEMS-based sensors in a ...
6] , and virtual reality systems [7] . ...
doi:10.3390/s21041383
pmid:33669466
fatcat:o7rwanw7srddljzihg6k3lcd7i
The MRS UAV System: Pushing the Frontiers of Reproducible Research, Real-world Deployment, and Education with Autonomous Unmanned Aerial Vehicles
[article]
2021
arXiv
pre-print
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2020 pre-print arXiv:2008.08050v2 fatcat:wwjrt2ucyvfp7krpywnsm2bfleOther Versions
Instead, we rely on rotation matrices and a novel heading-based convention to represent the one free rotational degree-of-freedom in 3D of a standard multirotor helicopter. ...
Two feedback control designs are presented: one for precise and aggressive maneuvers, and the other for stable and smooth flight with a noisy state estimate. ...
flight controller for attitude estimation and attitude rate control, http://pixhawk.com, http://px4.io. ...
arXiv:2008.08050v3
fatcat:gxxkence4jhsbkr72cf2jfbc7q
Drift Reduction in Pedestrian Navigation System by Exploiting Motion Constraints and Magnetic Field
2016
Sensors
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It is observed that these motion constraints (called "virtual sensor"), though considerably reducing drift in PNS, still need an absolute heading reference. ...
One common absolute heading estimation sensor is the magnetometer, which senses the Earth's magnetic field and, hence, the true heading angle can be calculated. ...
The hardware and data acquisition module for experimentation was designed by Seung-Ho Baeg. All of the work in this paper is done under the supervision of Sangdeok Park and Seung-Ho Baeg. ...
doi:10.3390/s16091455
pmid:27618056
pmcid:PMC5038733
fatcat:ngvmawotkza57do5f45oclhv24
The optokinetic cervical reflex in pilots of high-performance aircraft
1997
Aviation Space and Environmental Medicine
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The effect of these results on pilot training, spatial disorientation, physiological injury and safety, and the redesign of displays for aircraft attitude and virtual reality are discussed. ...
For over 60 yr, researchers and engineers have based investigations and the design of cockpit displays and structures upon the presupposition that during flight the pilot maintains a head alignment coincident ...
If HMDs do replace HUDs, an attitude display on the HMD will no longer be simply a reference but one of the primary sources for attitude information. ...
pmid:9184734
fatcat:oqrsjwrj35g7hgafqu42jeg7nu
Design of inertial navigation systems for marine craft with adaptive wave filtering aided by triple-redundant sensor packages
2015
International Journal of Adaptive Control and Signal Processing
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Wave filtering based on inertial navigation systems differ from previous vesselmodel-based designs which require knowledge of vessel parameters and mathematical models for estimation of thruster and wind ...
forces and moments based on auxiliary sensors. ...
ACKNOWLEDGEMENT This work has been carried out at the Centre for Autonomous Marine Operations and Systems (AMOS) and supported by the The Research Council of Norway and Rolls-Royce Marine. ...
doi:10.1002/acs.2645
fatcat:q4tfeq23lzarze6inv3gmkbsfu
Data Fusion Algorithms for Multiple Inertial Measurement Units
2011
Sensors
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Since accuracy and availability are the most important characteristics of a pedestrian navigation system, the analysis of each filter's performance focuses on these two parameters. ...
A single low cost inertial measurement unit (IMU) is often used in conjunction with GPS to increase the accuracy and improve the availability of the navigation solution for a pedestrian navigation system ...
It uses all gyro and accelerometer measurements as observations and provides an estimation of the virtual IMU accelerometer and gyro measurements. ...
doi:10.3390/s110706771
pmid:22163985
pmcid:PMC3231672
fatcat:oi6jusjjmjcwrcloijuri3h2qi
Estimating Orientation Using Magnetic and Inertial Sensors and Different Sensor Fusion Approaches: Accuracy Assessment in Manual and Locomotion Tasks
2014
Sensors
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(pitch and roll angles) and heading (yaw angle) errors using stereophotogrammetric data as a reference. ...
Accuracy improved mostly for heading and when the movement exhibited stationary phases, evenly distributed OPEN ACCESS Sensors 2014, 14 18626 3D rotations, it occurred in a small volume, and its duration ...
relies on magnetic measurements only for the heading estimates. ...
doi:10.3390/s141018625
pmid:25302810
pmcid:PMC4239903
fatcat:oou3vsg4n5fmhabz7uar7zwcxe
Low-Cost Monitoring System of Sensors for Evaluating Dynamic Solicitations of Semitrailer Structure
2016
Journal of Sensors
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For characterisation of these movements, a monitoring system having a low-cost inertial measurement unit (IMU) and global positioning system (GPS) antennas is developed with different configurations to ...
In this study, a low-cost monitoring system is developed for application to a real fleet of semitrailers. ...
The proposed low-cost system is based on the concept of fusion of an inertial measurement unit (IMU) and GNSS receivers with low-cost sensors. ...
doi:10.1155/2016/1740854
fatcat:ancfb4r5tfhrxnqhddvt5mnggm
An Estimation Method of Skeleton Proportion for Hand's Motion Capture
2018
International Journal of Performability Engineering
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Based on two specific gestures, the virtual hand model is calibrated. A skeleton proportion estimation algorithm based on specific attitudes is proposed. ...
In the meantime, the attitudes and positions of the virtual hand skeleton is calculated based on kinematics. Hand movement tracking is realized with accurate reduction. ...
based on a specific attitude to compensate for the error in the sensor wear process. ...
doi:10.23940/ijpe.18.01.p16.151158
fatcat:3ssefkxlljgalergk464izajce
Global Localization of a Mobile Robot by Data Fusion Attitude and Heading Reference Systems
2015
International Journal of Mechanical Engineering and Mechatronics
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In the present paper, a technique for attitude stabilization is proposed; the technique proposed is designed with attitude estimation based in data fusion of an Attitude and Heading Reference System AHRS ...
Generally, the attitude estimation and the measurement of the angular velocity are a requirement for the attitude control. ...
Navigation on a flat and horizontal ground only requires estimations of position and heading. ...
doi:10.11159/ijmem.2015.001
fatcat:sx4gnc7mlnb65fktfd5hgoenli
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