Wyniki wyszukiwania - BazTech

1

Fault-tolerant algorithm for a mobile robot solving a maze

Srebro A.

Challenges of Modern Technology

|

2013

|

Vol. 4, no. 1

21--29

EN

Maze solving problem has been considered since the ancient times. In robotics community this problem is widely known from the ”All Japan Micromouse Competition”. In this paper the author has extended the maze solving problem of cases when some robot distance sensors have been damaged. A new fault-tolerant algorithm for a mobile robot solving a maze is proposed. A dedi - cated simulator has been designed and written in Java to compare several maze solving algorithms for different combination of sensors failures.

2

Modelowanie trajektorii ruchu dwukołowego robota mobilnego na podstawie ruchu obrotowego względem środka chwilowego obrotu

Srebro A.

Modelowanie Inżynierskie

|

2011

|

T. 11, nr 42

407-418

PL

W pracy przedstawiono metody obliczania współrzędnych środka chwilowego obrotu robota ICR (ang. Instantaneous Center of Rotation) dla dwukołowego robota mobilnego na płaszczyźnie. Metody te pozwalają na obliczenie współrzędnych tego punktu przy znanych prędkościach liniowych oraz współrzędnych środka masy robota. Zaprezentowane metody stanowią dopełnienie transformacji afinicznych opisujących ruch robota na płaszczyźnie i pozwalają na zaprojektowanie algorytmu symulującego trajektorię ruchu robota w zależności od sygnałów sterowania prędkością. Przykładowy algorytm został zaimplementowany w środowisku symulacyjnym robota mobilnego napisanym w Javie. Dodatkowo przedstawiono i omówiono symulacje trajektorii ruchu robota dla rozpatrywanego różnicowego układu sterowania.

EN

The paper presents methods for calculating the instantaneous center of rotation (ICR) for two-wheeled mobile robot on the plane. These methods allow calculation of the coordinates of this point if linear velocities and the coordinates of the robot center of mass are known. Presented methods complement affine transformation describing the motion of the robot on the plane and allow to design an algorithm that simulates the trajectory of robot motion, depending on the speed control signals. An example algorithm has been implemented in a mobile robot simulation environment written in Java. In addition a few simulations of the trajectory of robot motion are presented and discussed for differential steering system.

3

A self-tuning fuzzy PD controller for a wheeled mobile robot operating in the presence of faults

Srebro A.

Challenges of Modern Technology

|

2011

|

Vol. 2, no. 4

11--20

EN

This paper presents a self-tuning fuzzy PD controller designed to improve a control strategy for a wheeled mobile robot. The dynamic model of a two-wheeled mobile robot was implemented in Matlab/Simulink environment. In this paper the trajectory tracking problem for a mobile robot in the presence of positioning system faults is considered in detail. Mamdani fuzzy reasoning is used to tune the value of proportional gain Kp and derivative gain Kd of a PD controller. A few simulations comparing the classical PD controller with self-tuning fuzzy PD are reported to show advantage of the designed self-tuning controller.

4

Java simulator for an autonomous mobile robot operating in the presence of sensor faults

Srebro A.

Challenges of Modern Technology

|

2010

|

Vol. 1, no. 1

56--60

EN

This paper presents two-dimensional mobile robot simulator written in Java. Robot performs autonomous navigation based on infrared sensors. Sensing range and angle can be adjusted in real-time. Obstacle detection an avoidance algorithm was implemented. In this paper, the wall-following problem for mobile robot in the presence of sensors faults is considered in detail. Time related method of robot orientation relative to the wall is shown. A few experimental tests are reported to discuss the robustness of control algorithm and verify simulations results.