An improved control technique of a very precise positioning system used in hail suppression systems

2015 ◽  
Author(s):  
Marian-Stefan Nicolae ◽  
Petre-Marian Nicolae ◽  
Gheorghe Manolea ◽  
Raluca-Cristina Presura ◽  
Radu-Florin Marinescu
Keyword(s):  
Control Technique ◽  
Positioning System ◽  
Precise Positioning ◽  
Hail Suppression ◽  
Suppression Systems

Modeling of Shape Memory Alloy Actuators Using Matlab and dSpace Platform

2010 ◽  
Vol 166-167 ◽  
pp. 149-154
Author(s):  
Ioan Adrian Cosma ◽  
Vistrian Măties ◽  
Ciprian Lapusan ◽  
Rares Ciprian Mîndru
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Dynamic Model ◽  
Dynamic Equations ◽  
Control Technique ◽  
Positioning System ◽  
Unknown Parameters ◽  
New Approach ◽  
Model Based Control ◽  
Input And Output

The aim of the paper is to describe an approach for modeling the dynamic behavior of a positioning system actuated by two shape memory alloy springs, placed in opposition. The mathematical analysis of the system in order to develop the dynamic model is difficult in this case because of the unknown parameters within the dynamic equations (thermodynamics, change in austenite fraction) and therefore a new approach is presented. Thus, a positioning system is considered, and its behavior is determined using Matlab Software, D-space platform and an optical sensor, which analyses the position/velocity of the moving cart. The dynamic model of the system is determined in order to develop a further model based control technique. The model is generated using system identification toolbox within Matlab and input and output (response) of the considered system.

A Precise Positioning System Based on DGPS and GIS for Automatic Driving Vehicle

2013 ◽  
Vol 416-417 ◽  
pp. 776-780
Author(s):  
Jian Guo Zhang ◽  
Hong Jian Li ◽  
Bin Liu
Keyword(s):  
Data Base ◽  
Intelligent Vehicle ◽  
Positioning System ◽  
Accurate Data ◽  
Traffic Signs ◽  
Precise Positioning ◽  
Traffic Lights ◽  
The Road ◽  
Automatic Driving ◽  
Position Data

A precise positioning technology was introduced in this paper and A precise positioning system has been built. The DGPS technology was introduced to acquire accurate data of the roads and traffic facilities in the system and a data-base has been built. The data-base was applied to GIS platform and a centimeter-level accurate road model was established. In addition, DGPS technology was adopted to achieve centimeter-level position. The position data coupling with accurate road model and the locating point would be indicated instantaneously. The distance between the locating point and the road boundaries, traffic signs lines, traffic lights, etc. could be indicated in the map and also the speed, acceleration, etc. of the locating point. This study provided positioning and navigation technology for the automatic driving technology of the intelligent vehicle.

A surface motor-driven precise positioning system

1994 ◽  
Vol 16 (3) ◽  
pp. 184-191 ◽  
Author(s):  
Yoshiyuki Tomita ◽  
Yasushi Koyanagawa ◽  
Fumiaki Satoh
Keyword(s):  
Positioning System ◽  
Precise Positioning

scholarly journals Development of Six-Axis Precise Positioning System Driven by Surface Motor.

1996 ◽  
Vol 62 (597) ◽  
pp. 1840-1847 ◽  
Author(s):  
Yoshiyuki TOMITA ◽  
Masanobu SUGIMINE ◽  
Yasushi KOYANAGAWA
Keyword(s):  
Positioning System ◽  
Precise Positioning

scholarly journals MODELLING A COMPLIANT-BASED PRECISE POSITIONING STAGE / AUKŠTO TIKSLUMO POZICIONAVIMO SISTEMOS MODELIAVIMAS TAIKANT BESIDEFORMUOJANČIUS MECHANIZMUS

2013 ◽  
Vol 6 (4) ◽  
pp. 523-527 ◽  
Author(s):  
Giedrius Augustinavičius ◽  
Audrius Čereška
Keyword(s):  
Mathematical Model ◽  
Finite Element Analysis ◽  
Positioning System ◽  
Element Analysis ◽  
Precise Positioning ◽  
Positioning Systems ◽  
Positioning Stage ◽  
Amplification Mechanism ◽  
Analytical Approaches ◽  
The Mathematical Model

The paper presents modelling precise dual axis flexure-based precision positioning systems for micro-positioning applications. The positioning system is featured with monolithic architecture, flexure-based joints and piezo stacks. Its workspace has been evaluated via analytical approaches. Amplification mechanism is optimally designed. The mathematical model of the positioning system has been derived and verified by resorting to finite element analysis (FEA). The established analytical and (FEA) models are helpful for optimizing reliable architecture and improving the performance of the positioning system. Santrauka Straipsnyje pristatomas dviejų ašių didelio tikslumo pozicionavimo sistemos su paketiniais pjezovykdikliais modeliavimas, taikant besideformuojančius vientiso kūno mechanizmus. Pozicionavimo sistemą sudaro besideformuojančio vientiso kūno mechanizmas ir paketiniai pjezovykdikliai. Besideformuojantis vientiso kūno mechanizmas norimam poslinkiui pasiekti buvo optimizuotas Solidworks Simulation programiniu paketu. Platformų poslinkiams apskaičiuoti sudarytas matematinis modelis, kurio patikimumas patikrintas baigtinių elementų metodu. Sudaryto matematinio modelio ir rezultatų, gautų baigtinių elementų metodu, skirtumai yra mažesni nei 5 %, todėl pasiūlyta modeliavimo metodika gali būti taikoma kuriant pozicionavimo sistemas su besideformuojančiais elementais.

scholarly journals Precise Positioning of Autonomous Vehicles Combining UWB Ranging Estimations with On-Board Sensors

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1238
Author(s):  
Javier San Martín ◽  
Ainhoa Cortés ◽  
Leticia Zamora-Cadenas ◽  
Bo Joel Svensson
Keyword(s):  
Autonomous Vehicles ◽  
Research Work ◽  
Ultra Wideband ◽  
Line Of Sight ◽  
Use Case ◽  
Positioning System ◽  
Precise Positioning ◽  
Research Institutes ◽  
Simulated Environment ◽  
Non Line Of Sight

In this paper, we analyze the performance of a positioning system based on the fusion of Ultra-Wideband (UWB) ranging estimates together with odometry and inertial data from the vehicle. For carrying out this data fusion, an Extended Kalman Filter (EKF) has been used. Furthermore, a post-processing algorithm has been designed to remove the Non Line-Of-Sight (NLOS) UWB ranging estimates to further improve the accuracy of the proposed solution. This solution has been tested using both a simulated environment and a real environment. This research work is in the scope of the PRoPART European Project. The different real tests have been performed on the AstaZero proving ground using a Radio Control car (RC car) developed by RISE (Research Institutes of Sweden) as testing platform. Thus, a real time positioning solution has been achieved complying with the accuracy requirements for the PRoPART use case.

scholarly journals Identification of Friction Models for Precise Positioning System in Machine Tools

2013 ◽  
Vol 53 ◽  
pp. 569-578 ◽  
Author(s):  
T.H. Chiew ◽  
Z. Jamaludin ◽  
A.Y. Bani Hashim ◽  
N.A. Rafan ◽  
L. Abdullah
Keyword(s):  
Machine Tools ◽  
Positioning System ◽  
Precise Positioning ◽  
Friction Models

Development of Wire-Connected Mechanism for Precise Positioning

2012 ◽  
Vol 523-524 ◽  
pp. 645-649 ◽  
Author(s):  
Masahiro Shinoda ◽  
Shinnosuke Hirata ◽  
Hisayuki Aoyama
Keyword(s):  
Work Environment ◽  
Piezoelectric Element ◽  
Positioning System ◽  
Precision Positioning ◽  
Precise Positioning ◽  
Micro Assembly ◽  
Nano Scale ◽  
Positioning Method

Micro/nano positioning is one of important techniques to operate bio-cell and micro assembly. For realizing the precise positioning, the various piezo-driven stages have been already proposed and micro/nano scale resolution has been achieved. However, it is pointed out that the existing precision positioning tools are too large compared to operating area. Their devices are too difficult to combine other devices and use in tight environment like under microscope. In this paper, a precise positioning method with wire connected mechanism under microscope is proposed. The proposed positioning system is simply composed actuators including piezoelectric element and super extra-fine wires. By applying wire connected mechanism, the saving of larger work environment compared to traditional devices is hoped.

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