scholarly journals Small-Range High-Precision Positioning Based on Two-Point Coordination for Robot

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Zhengping Li ◽  
Chaoliang Qin ◽  
Hao Shi
Keyword(s):  
High Precision ◽  
Sampling Frequency ◽  
Small Range ◽  
Precision Positioning ◽  
Fusion Algorithm ◽  
Positioning Accuracy ◽  
Sinc Interpolation ◽  
Rms Error ◽  
Simulation Results ◽  
Positioning Algorithm

This paper proposed a two-point coordinated positioning algorithm. Based on the assumption that the distance between two points was constant, a fusion algorithm was introduced into the positioning process to enhance the positioning accuracy. The simulation results showed that the proposed algorithm could reduce the RMS error to about 50% of the improved sinc interpolation-based positioning algorithm when the sampling frequency was 500 MHz and the interpolation number was 19.

scholarly journals Small Range High Precision Positioning Algorithm Based on Improved Sinc Interpolation

2016 ◽  
Vol 5 (2) ◽  
pp. 70-76
Author(s):  
Zhengping Li ◽  
◽  
Chaoliang Qin ◽  
Yongmei Zhang ◽  
Li Ma ◽  
...  
Keyword(s):  
High Precision ◽  
Small Range ◽  
Precision Positioning ◽  
Sinc Interpolation ◽  
Positioning Algorithm

scholarly journals An Improved Long-Period Precise Time-Relative Positioning Method Based on RTS Data

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 53
Author(s):  
Yangwei Lu ◽  
Shengyue Ji ◽  
Rui Tu ◽  
Duojie Weng ◽  
Xiaochun Lu ◽  
...  
Keyword(s):  
High Precision ◽  
Reference Station ◽  
Positioning Error ◽  
Relative Positioning ◽  
Precision Positioning ◽  
Positioning Accuracy ◽  
Long Period ◽  
Short Period ◽  
Positioning Method ◽  
Positioning Algorithm

The high precision positioning can be easily achieved by using real-time kinematic (RTK) and precise point positioning (PPP) or their augmented techniques, such as network RTK (NRTK) and PPP-RTK, even if they also have their own shortfalls. A reference station and datalink are required for RTK or NRTK. Though the PPP technique can provide high accuracy position data, it needs an initialisation time of 10–30 min. The time-relative positioning method estimates the difference between positions at two epochs by means of a single receiver, which can overcome these issues within short period to some degree. The positioning error significantly increases for long-period precise positioning as consequence of the variation of various errors in GNSS (Global Navigation Satellite System) measurements over time. Furthermore, the accuracy of traditional time-relative positioning is very sensitive to the initial positioning error. In order to overcome these issues, an improved time-relative positioning algorithm is proposed in this paper. The improved time-relative positioning method employs PPP model to estimate the parameters of current epoch including position vector, float ionosphere-free (IF) ambiguities, so that these estimated float IF ambiguities are used as a constraint of the base epoch. Thus, the position of the base epoch can be estimated by means of a robust Kalman filter, so that the position of the current epoch with reference to the base epoch can be obtained by differencing the position vectors between the base epoch and the current one. The numerical results obtained during static and dynamic tests show that the proposed positioning algorithm can achieve a positioning accuracy of a few centimetres in one hour. As expected, the positioning accuracy is highly improved by combining GPS, BeiDou and Galileo as a consequence of a higher amount of used satellites and a more uniform geometrical distribution of the satellites themselves. Furthermore, the positioning accuracy achieved by using the positioning algorithm here described is not affected by the initial positioning error, because there is no approximation similar to that of the traditional time-relative positioning. The improved time-relative positioning method can be used to provide long-period high precision positioning by using a single dual-frequency (L1/L2) satellite receiver.

scholarly journals High Precision Positioning with Multi-Camera Setups: Adaptive Kalman Fusion Algorithm for Fiducial Markers

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2746 ◽  
Author(s):  
Dragos Constantin Popescu ◽  
Ioan Dumitrache ◽  
Simona Iuliana Caramihai ◽  
Mihail Octavian Cernaianu
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
High Precision ◽  
Measurement Noise ◽  
Fusion Method ◽  
Fiducial Markers ◽  
Multiple Cameras ◽  
Precision Positioning ◽  
Fusion Algorithm ◽  
Physics Experiments

The paper addresses the problem of fusing the measurements from multiple cameras in order to estimate the position of fiducial markers. The objectives are to increase the precision and to extend the working area of the system. The proposed fusion method employs an adaptive Kalman algorithm which is used for calibrating the setup of cameras as well as for estimating the pose of the marker. Special measures are taken in order to mitigate the effect of the measurement noise. The proposed method is further tested in different scenarios using a Monte Carlo simulation, whose qualitative precision results are determined and compared. The solution is designed for specific positioning and alignment tasks in physics experiments, but also, has a degree of generality that makes it suitable for a wider range of applications.

Hardware Structures for High Precision Pneutronic Systems

2014 ◽  
Vol 658 ◽  
pp. 541-546 ◽  
Author(s):  
Mihai Avram ◽  
Victor Constantin ◽  
Constantin Bucşan ◽  
Daniel Besnea ◽  
Alina Spanu
Keyword(s):  
High Precision ◽  
Weight Ratio ◽  
Nonlinear Behavior ◽  
Compressed Air ◽  
Power Weight ◽  
Precision Positioning ◽  
Positioning Accuracy ◽  
Large Power ◽  
Pneumatic Actuators ◽  
Positioning Systems

Pneutronic systems come with a series of advantages that are natural to working with compressed air, such as the large power/weight ratio of pneumatic actuators, easy and affordable installation and maintenance as well as being clean working systems. However, due to working with compressed air, there are a series of issues, such as static and transient nonlinear behavior, mostly due to the high compressibility of air. Thus, the behavior of such systems is hard to control, especially in terms of precision positioning. The paper deals with proposing three hardware configurations of pneutronic positioning systems in order to assure the imposed positioning accuracy in the presence of disturbances and the preservation in time of the obtained position.

The Study Based on LABVIEW of the Positioning Accuracy of Spinneret Microporous Fine Machine

2013 ◽  
Vol 712-715 ◽  
pp. 1347-1350
Author(s):  
Si Yu Liu ◽  
Pei Feng ◽  
Chong Chang Yang
Keyword(s):  
Pore Size ◽  
High Precision ◽  
Vital Role ◽  
Positioning System ◽  
Precision Positioning ◽  
Positioning Accuracy ◽  
Small Pore Size ◽  
Small Pore ◽  
Positioning Method

The microporous on spinneret has the characteristics of high precision, small pore size and large quantity. Spinneret microporous finishing operation is mainly used for removing the burr formed on the spinneret silk surface after micropores drilling and punching. The burrs seriously affect the quality of the spinning fibers. Micropore spinneret finishing plays a vital role in improving the quality of processing micropore. This paper introduces a system consisting of the spinneret micropore fine machine,then focuses on fine machine positioning system and proposes a high-precision positioning method of the microporous.

High-precision positioning algorithm based on GPS

2010 ◽  
Author(s):  
Cui-Xia Li ◽  
Wei-Ming Liu ◽  
Jian-Wei Wu
Keyword(s):  
High Precision ◽  
Precision Positioning ◽  
Positioning Algorithm

The high precision positioning algorithm of circular landmark center in visual measurement

Optik ◽  
2014 ◽  
Vol 125 (21) ◽  
pp. 6570-6575 ◽  
Author(s):  
Jiashan Cui ◽  
Ju Huo ◽  
Ming Yang
Keyword(s):  
High Precision ◽  
Precision Positioning ◽  
Visual Measurement ◽  
Positioning Algorithm

Analysis of Positioning Accuracy Based on Focused Beam Forming

2013 ◽  
Vol 441 ◽  
pp. 607-610
Author(s):  
Fang Niu ◽  
Juan Hui ◽  
Feng Li ◽  
Feng Yuan Zhang
Keyword(s):  
Sound Velocity ◽  
High Precision ◽  
Frequency Band ◽  
Linear Array ◽  
Near Field ◽  
Beam Forming ◽  
Precision Positioning ◽  
Positioning Accuracy ◽  
Velocity Impact ◽  
Focused Beam

The technology of focused beam forming is mainly used for solving some certain problems about high-precision passive positioning in near field. In view of the problem of positioning accuracy, this paper discusses the effects of factors on the width of focused peak and its changes with the factors. The result of study shows the longer arrays length and the higher frequency band of signal and the shorter distance to the target, the narrower width of focused peak, which means the higher the positioning accuracy. The influence of the errors on the positioning accuracy is also simulated and analyzed in this paper. It turned out that, when horizontal linear array is used in the positioning, the horizontal error from the placement of array and parts of array elements no working have little effect on the positioning accuracy for the reason of the horizontal directivity of the array. The vertical errors from the placement of array, from the measurement of depth of the sea and the sound velocity impact the positioning accuracy a bit more. With the analysis of positioning accuracy, it proves that the technology of focused beam forming can realize high-precision positioning in near field. Finally, several suggestions on improving the positioning quality are offered.

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