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Wyświetlanie 1-13 z 13
Tytuł:
Modeling and Control of a 4-wheel Skid-steering Mobile Robot
Autorzy:
Kozłowski, K.
Pazderski, D.
Powiązania:
https://bibliotekanauki.pl/articles/907961.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
robot mobilny
backstepping
analiza Lyapunova
mobile robots
skid-steering vehicles
time-varying control laws
Lyapunov analysis
Opis:
A mathematical model of a 4-wheel skid-steering mobile robot is presented in a systematic way. The robot is considered as a subsystem consisting of kinematic, dynamic and drive levels. Next, a designing process of a kinematic controller based on the algorithm introduced by (Dixon et al., 2001) is shown. An extension of the kinematic control law at the dynamic and motor levels using the Lyapunov analysis and the backstepping technique is developed. To validate the designed algorithm, extensive simulation results for trajectory tracking and set-point cases are discussed. Some deliberations concerning the tuning of the controller are presented, too.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2004, 14, 4; 477-496
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trajectory tracking for a mobile robot with skid-slip compensation in the vector-field-orientation control system
Autorzy:
Michałek, M.
Dutkiewicz, P.
Kiełczewski, M.
Pazderski, D.
Powiązania:
https://bibliotekanauki.pl/articles/929982.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
robot mobilny
śledzenie trajektorii
pole wektorowe
differentially driven mobile robot
skid-slip compensation
trajectory tracking
vector fields
Opis:
The article is devoted to a motion control problem for a differentially driven mobile robot in the task of trajectory tracking in the presence of skid-slip effects. The kinematic control concept presented in the paper is the Vector Field Orientation (VFO) feedback approach with a nonlinear feed-forward skid-slip influence compensation scheme. The VFO control law guarantees asymptotic convergence of the position tracking error to zero in spite of the disturbing influence of skid-slip phenomena. The paper includes a control law design description, stability and convergence analysis of a closed-loop system, and practical verification of the proposed control concept. The experimental results illustrate control quality obtained on a laboratory setup equipped with vision feedback, where the Kalman filter algorithm was used in order to practically estimate skid-slip components.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2009, 19, 4; 547-559
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vision localization system for mobile robot with velocities and acceleration estimator
Autorzy:
Dutkiewicz, P.
Kielczewski, M.
Kozłowski, K.
Pazderski, D.
Powiązania:
https://bibliotekanauki.pl/articles/199936.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
vision localization system
mobile robot
acceleration estimator
Opis:
The paper presents a localization system for a mobile robot using the vision system and LED markers and considers the problem of velocity and acceleration estimation in the case of planar motions. Theoretical considerations include the principle of measurement and the details of Kalman estimator with illustrations based on experimental setup. The presented measurement system can be used for a realization of advanced control algorithms for skid-steering mobile robots where significant slippage phenomenon appears.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 1; 29-41
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and experimental research of nonholonomic ball gear
Autorzy:
Krysiak, B.
Pazderski, D.
Kozłowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/384790.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
nonholonomic constraint
nonholonomic manipulator
kinematics and dynamics
Opis:
The paper considers kinematic and dynamic model of ball gear which can be used in a nonholonomic manipulator. The phase constraints are described and constrained forces and torques are discussed. In order to describe mechanical properties of the gear experimental research were conducted. Based on experimental results maximum driving torque, gear efficiency and resultant slip are estimated.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2011, 5, 3; 27-32
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time obstacle avoidance using harmonic potential functions
Autorzy:
Szulczyński, P.
Pazderski, D.
Kozłowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/384802.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
motion planning
obstacle avoidance
mobile robot
harmonic function
Opis:
The paper presents a solution of motion planning and control of mobile robot in a two-dimensional environment with elliptical static obstacle based on hydrodynamics description. Theoretical background refers to solution of Laplace equation using complex algebra. The method of designing complex potential with respect to stationary elliptical obstacle and stationary goal is formally shown. Next, the planning motion problem is extended assuming that the goal is moving. Then results of motion planning is used in order to design closed-loop control algorithms which is based on decoupling technique. Theoretical considerations are supported by numerical simulations illustrating example results of motion planning and control.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2011, 5, 3; 59-66
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System programowania i sterowania modułowego robota mobilnego do zastosowań transportowych w pomieszczeniach
Programming and control system of modular mobile robot to transportation tasks in closed environments
Autorzy:
Kozłowski, K.
Majchrzak, J.
Michałek, M.
Pazderski, D.
Powiązania:
https://bibliotekanauki.pl/articles/277022.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
roboty mobilne
programowanie robotów
sterowanie
mobile robots
robots programming
control
Opis:
Praca prezentuje koncepcję oraz realizację wybranych elementów modułowego robota mobilnego do zastosowań transportowych w pomieszczeniach. Zaprezentowano konstrukcję, elementy systemu sterowania oraz sposób programowania zadań dla robota. W projekcie uwzględniono wymogi bezpieczeństwa ludzi oraz założenie przyjaznego systemu programowania.
This paper presents an idea and application of selected elements of modular mobile robot used for transportation tasks in closed environments. Some details with respect to robot's mechanical structure, its control system and programming language are described. Additionally, requirements for safety system are formulated and assumptions of user-friendly system for robot programming are discussed.
Źródło:
Pomiary Automatyka Robotyka; 2011, 15, 2; 113-126
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Closed-loop control algorithm for some class of nonholonomic systems using polar representation
Autorzy:
Pazderski, D.
Szulczyński, P.
Kozłowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/201607.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
polar coordinates
nonholonomic system
discontinuous stabilization at the origin
Opis:
This paper is focused on the convergence problem defined for some class of a two input affine nonholonomic driftless system with three-dimensional state. The problem is solved based on a polar transformation which is singular at the origin. The convergence is ensured using static-state feedback. The necessary conditions for construction of the algorithm are formally discussed. The solution, in general, is local, and the feasible domain is strictly related to the properties of the control system. In order to improve algorithm robustness a simple hybrid algorithm is formulated. The general theory is illustrated by two particular systems and the results of numerical simulations are provided.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 521-535
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of a unicycle-like robot with trailers using transverse function approach
Autorzy:
Pazderski, D.
Kozłowski, K.
Waśkowicz, D.
Powiązania:
https://bibliotekanauki.pl/articles/201599.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transverse functions
vehicle with trailers
nonholonomic system
control motion task
Lie group
Opis:
The paper presents the application of a smooth kinematic algorithm to control multi-body vehicle which consists of the unicyclelike tractor with three trailers. The controller takes advantage of the transverse functions and properties of the IV-order two input chained system. The derivation of the algorithm is presented in details. In order to improve the performance of the controller in the real application a selected tuning techniques are discussed. The properties of the closed-loop control system are examined based on results of numerical simulations concerning the point stabilization and trajectory tracking tasks.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 557-579
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kołowa platforma mobilna dla celów badawczych
Wheeled mobile platform for research purposes
Autorzy:
Kozłowski, K.
Pazderski, D.
Michalski, M.
Dutkiewicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/274908.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
robot mobilny
agent upostaciowiony
funkcje transwersalne
mobile robot
embodied agent
transversal functions
Opis:
W pracy przedstawiono założenia i koncepcję rozwiązania zadania zatytułowanego „Sterowanie i nawigacja” (SiN) będącego częścią składową projektu RobREx oraz przedstawiono krótki opis budowy kołowej platformy mobilnej przeznaczonej dla celów badawczych. Platforma ta została zbudowana w Katedrze Sterowania i Inżynierii Systemów Politechniki Poznańskiej. W artykule opisano niektóre aspekty implementacyjne algorytmu sterowania ruchem platformy wykorzystującym funkcje transwersalne.
The paper presents the assumptions and concepts solve the task titled “Control and Navigation” which is part of the project RobREx and gives a brief description of the construction of a wheeled mobile platform intended for research purposes. This platform has been built in the Chair of Control and Systems Engineering University of Technology. The article describes some aspects of implementing an algorithm of motion control that uses transversal functions.
Źródło:
Pomiary Automatyka Robotyka; 2014, 18, 5; 120-126
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Manipulative robot for knee rehabilitation of patients with Ilizarov apparatus mounted on the thigh
Autorzy:
Krysiak, B.
Majchrzak, J.
Pazderski, D.
Sauer, P.
Powiązania:
https://bibliotekanauki.pl/articles/2063862.pdf
Data publikacji:
2014
Wydawca:
Międzynarodowe Stowarzyszenie na rzecz Robotyki Medycznej
Tematy:
robot manipulacyjny
rehabilitacja
staw kolanowy
aparat Ilizarowa
robotic manipulator
rehabilitation
knee joint
Ilizarov apparatus
Opis:
We present a new manipulative robotic system with 1 degree of freedom designed for increasing of the knee rehabilitation efficiency in case of patients with the femur distraction osteogenesis with use of Ilizarov apparatus. Based on the conducted analysis of the knee’s anatomy, biomechanical functionality of knee-joint and characteristics of considered medical treatment, overall assumptions concerning robotic assistance in knee rehabilitation process are formulated. Then we propose a simplified kinematic structure based on one rotational fixed axis taking into accountguidelines resulting from specificity of complications following a femur distraction osteogenesis with use of Ilizarov apparatus. The paper presents description of mechanical and measurement system for a considered manipulative robot. The issues regarding patient’s safety while realization of robotic rehabilitation are also discussed. Additionally, motion control and force control design issues are considered and some preliminary experimental results are presented.
Źródło:
Medical Robotics Reports; 2014, 3; 13--18
2299-7407
Pojawia się w:
Medical Robotics Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of a planar robot in the flight phase using transverse function approach
Autorzy:
Pazderski, D.
Kozłowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/201212.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transverse functions
hopping robot
space manipulator
nonholonomic system
control motion task
systems on Lie groups
skaczący robot
manipulator przestrzenny
nieholonomiczny układ
Opis:
This paper deals with stabilization and tracking control problems defined with respect to a planar mechanical structure similar to Raibert’s robot. The proposed control solution is based on formal analysis of the control system on a Lie group. In order to take advantage of Lie group theory a dynamic extension of the robot kinematics is introduced. To cope with non-zero angular momentum the controller based on transverse functions is employed. Properties of the closed-loop control system are investigated based on simulations including practical stabilization at neighborhood of a constant point or a reference trajectory.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 3; 759-770
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of transverse functions to control differentially driven wheeled robots using velocity fields
Autorzy:
Pazderski, D.
Powiązania:
https://bibliotekanauki.pl/articles/200419.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transverse functions
nonholonomic systems
systems on Lie groups
potential function
velocity fields
pola prędkości
funkcja transwersalna
system nieholonomiczny
grupa Liego
funkcja potencjalna
Opis:
This paper deals with control of a nonholonomic unicycle-like robot in a cluttered environment with static obstacles. The proposed solution is based on a combination of a universal motion controller taking advantage of transverse functions with a navigation velocity field determining a path in a free task space. The motion controller is used to imitate an omnidirectional planar kinematics such that nonholonomic constraints become hidden for a navigation layer. Then it is possible to generate vector fields which govern motion of the omnidirectional frame. The controller using the transverse function is discussed in depth. In particular, a possible parametrization of this function is considered and analysis of an augmented dynamics is provided for different motion patterns. Next, construction of obstacles and potential design for star-like shapes are presented. The navigation algorithm is verified experimentally and the results are discussed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 831-851
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A robust smooth controller for a unicycle-like robot
Autorzy:
Pazderski, D.
Powiązania:
https://bibliotekanauki.pl/articles/229667.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transverse functions
nonholonomic system
control motion task
Lie group
navigation vector fields
smooth feedbacks
Opis:
In this paper, a stabilizer dedicated for a unicycle-like robot is considered. The proposed smooth control law ensures the global boundedness of position and orientation trajectories to a neighbourhood of the desired point with an arbitrarily selected radius and it is robust to bounded additive measurement noises. The controller consists of a smooth hybrid navigation algorithm and a smooth feedback based on the transverse function approach. The stability proof, simulation and experimental results illustrating properties of the algorithm are discussed.
Źródło:
Archives of Control Sciences; 2018, 28, 1; 155-183
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-13 z 13

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