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This paper presents a method of designing variable structure control systems for robots. As the on-board robot computational resources are limited, but in some cases the demands imposed on the robot by the user are virtually limitless, the solution is to produce a variable structure system. The task dependent part has to be exchanged, however the task governs the activities of the robot. Thus not...
In the article the whole process of a manipulator controller development is presented. The controller is designed for the execution of various benchmark tasks in the field of service robotics. Initially, a set of system behaviors is presented as the base of the universal controller structure. For that purpose the embodied agent theory and the System Modeling Language are utilized. The execution and...
Advanced robot control algorithms, that are based on sensor data fusion and a lot of processing, require high computational power. Hence, most of the modern robots have their own highly efficient computers. It makes the service and assistant robots costly and still unavailable for the most of the home users. In this paper the navigation system of the humanoid NAO robot is presented that is distributed...
In this article the design procedure of a control system of a mobile robot with various modes of locomotion has been considered. The procedure is based on an embodied agent theory and focuses on the agent behaviours and transitions between them. The procedure was introduced to speed up and organize the whole controller development process. The effectiveness of the proposed approach is proved through...
In the article, a reactive torque-based hierarchical task-space control for a robot with multiple redundant DOFs is presented that is suitable to plan, validate and execute a humanoid upper-body motion in human oriented environment. The strategy consists of: (i) joint limit avoidance, (ii) self-collision avoidance using repulsive force fields with additional environment collision avoidance, (iii)...
In the article we propose a fast and cheap strategy of service robot kinematic parameters calibration. Our method is based on sensors (cameras in particular) that are already mounted on the robot and inexpensive markers, that are easy to fix on the robot arms. We developed the method to compute the impact of manipulator velocity on markers localization error in camera image. Thanks to our method,...
The paper presents an outline of the specification of a robot controller used in manipulation tasks requiring object grasping by a multi-fingered gripper and interaction with the environment. The specification assumes that the robot is represented as an embodied agent composed of real and virtual effectors and receptors and the control subsystem. The actions of those subsystems are defined by finite...
Opening a door with a robotic manipulator equipped with a gripper, is a vital problem in service robotics research. This paper presents an approach to opening a cabinet door with an impedance controlled 7-DOF redundant manipulator. A control system is developed that considers redundancy in order to maximise the manipulation capabilities of the manipulator whilst avoiding reaching the joints limits...
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