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Mobile robots are remarkable cases of high development technology and systems. Robot community developed a complex analysis to meet the increased demands for the control challenges for the movement of Robot. A model predictive control (MPC) approach is used in combination with feedforward Controller in a context of decoupling controller. Implementation of this algorithm in the ROS system is presented...
A mobile robot with a limited sensing range is deployed to search for a stationary target that intermittently emits short duration signals. The searching mission is accomplished as soon as the robot receives a signal from the target. We propose the expected searching time (EST) as a primary metric to evaluate different robot motion plans under different robot configurations. To illustrate the proposed...
A visual control system is designed for a table tennis robot with five degrees of Freedom (DOFs). It consists of four parts such as ball sensing, trajectory predicting, motion planning, and motion control. A highvelocity stereo vision system with parallel architecture is developed to sense the motions of table tennis ball. The striking parameters including position, velocity, and time are predicted...
To control the motion of a humanoid robot along a desired trajectory in contact with a rigid object, we need to take into account forces that arise from contact with the surface of the object. In this paper we propose a new method that enables the robot to adapt its motion to different surfaces. The initial trajectories are encoded by dynamic movement primitives, which can be learned from visual feedback...
Artificial potential field (APF) is well established for reactive navigation of robots. Initially, this paper describes a fast and robust fuzzy-APF on an ActivMedia AmigoBot platform. Obstacle-related information is fuzzified just by sensory fusion which results in shorter runtime. The membership functions of obstacles' range and direction have been also merged into one function for smaller block...
Continuum manipulators, featuring “continuous backbone structures”, are promising for deft manipulation of a wide range of objects under uncertain conditions in less-structured and cluttered environments. A multi-section trunk/tentacle robot is such a continuum manipulator. With a continuum robot, manipulation means a continuous whole-arm motion, often without a clear distinction between transport...
Recent development of motion control technology brings robots to our daily life. In the daily life, physical distance between humans and robots get very closer. This closed distance leads new issues in human robot interaction, such as safety issue and communication issue. The authors developed haptic sensing system called haptic armor. The sensory system can detect any contact on the robot surface...
Trajectory generation consists in computing a feasible trajectory between a start and a goal state-time, for a given robotic system. We presented in our previous works a trajectory generator called Tiji, geared towards complex dynamic systems subject to differential constraints. Moreover, it is able to handle a final time constraint, ie an interval of time during which the goal state must be reached,...
Sensory-motor coordination (SMC) is an important ability for both natural organisms and mobile robots. This work investigates the role that purely reactive SMC has on a robot's ability to perform a deliberative motion identification task. We investigate three conditions under which a robot can utilize SMC, namely arbitrary (the motion strategy of the robot is fixed), adaptable (the motion strategy...
In this paper, we consider a multi-robot cooperative control problem via a robust consensus tracking algorithm. The main objective of this paper is to develop and implement a multi-robot formation control testbed and use it to verify the effectiveness of a cooperative control algorithm developed in our recent work. In the robust consensus tracking algorithm, an observer is developed to identify the...
The cluster space state representation for multirobot systems provides a simple means of specifying and monitoring the geometry and motion characteristics of a cluster of mobile robots. In previous work, this approach has been experimentally verified and validated for controlling the motion of planar mobile multi-robot systems ranging from land rovers to autonomous boats. In this paper we present...
In this paper a separation maintenance controller is developed for continuously steering a purposive, dynamic group of mobile agents away from each other in a confined, cluttered environment. The controller allows conflict-free, simultaneous use of space by the agents. It has a decentralized form that is constructed in conformity with the artificial life approach to behavior synthesis. The G-type...
This paper presents control methods and simulation experiments of wheeled skid-steering mobile robot trajectory tracking on the rough terrain. According to dynamics analysis of the robot, a motion constraint of the robot is put forward. To address the issue of uncertain disturbance factors during the robot running on the rough terrain, a practical fuzzy lateral control law is presented, and the globally...
Trajectory planning and optimization is a fundamental problem in articulated robotics. It is often viewed as a two phase problem of initial feasible path planning around obstacles and subsequent optimization of a trajectory satisfying dynamical constraints. There are many methods that can generate good movements when given enough time, but planning for high-dimensional robot configuration spaces in...
The purpose of this research is to realize a motion along a straight line by a unicycle robot. The robot consists of upper and lower bodies connected with a joint. Our final target of this research is to realize navigation in indoor environment with the robot. In this paper, we describe the driving control system, and show results of the motion desired.
This paper proposes a novel accompanied snake (A-Snake) method for robot motion control considering both path planning and motion control simultaneously. The A-Snake is an elastic path generated in real-time for guiding a robot to navigate from its current position to its target position following a reference path, by considering the robot's nonholonomic constraints. A rolling window optimisation...
Autonomous Underwater Vehicle (AUV) are moving to a new phase with the development of light intervention systems. New vehicles will be equipped with lightweight manipulators and operate around subsea infrastructures. One of the key capabilities to safely perform such mission is robust and accurate autonomous localisation, i.e. the ability for the AUV to estimate correctly its position and orientation...
This paper addresses the problem of posture stabilization for a wheeled mobile robot with nonholonomic constraints. Due to the richness of mappings from sensor space to actuator signal space and the complexity of system and environment modeling, it becomes particularly difficult to select an appropriate control law for the posture stabilization problem. In this paper, we propose a novel approach based...
This paper addresses a problem of sweep coverage by a network of self-deployed autonomous vehicles. We propose a decentralized motion coordination algorithm for the vehicles to accomplish the deployment objective of sweep coverage. The control algorithm is developed theoretically using the ideas of nearest neighbor rules, and its effectiveness is illustrated via numerical simulations.
This paper presents a motion control algorithm for a multiple mobile autonomous agents using the concept of a rigid and persistent formation with a Leader-Follower structure. Initially, a triangular formation was started for three agents and subsequently Henneberg Sequence [Tolga, et al; 2005] is applied to extend for multi-agent system. A decentralized control for each agent considering the shortest...
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