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In recent years, it becomes more common for humans to use teleoperated robot systems. Mobile robot is effective as the teleoperated robot due to its large working area. The conventional mobile robots are generally controlled based on position and velocity control system, and they are not able to transmit tactile information. Introduction of force feedback is an effective solution, but it increases...
This paper studies mobility strategies to control positions of mobile robots in a mobile sensor network in order to maximize lifetime of the network. With communication and mobility energy costs modeled, the problem is formulated into a nonlinear non-convex optimization problem, then reformulated into a convex optimization problem. The separable property of the system is then exploited by Lagrangian...
Extended Kalman Filter (EKF) has been a popular approach in localization of a mobile robot. However, the performance of the EKF and the quality of the estimation depends on the correct a priori knowledge of process and measurement noise covariance matrices (Qk and RK, respectively). Imprecise knowledge of these statistics can cause significant degradation in performance. In this paper, the Adaptive...
Robot navigation has been a hot topic in the area of mobile robot. A lot of research has been undergone ranging from noble algorithms to applications. Fisheye image has wide angle View and it is easy to obtain the position of the object and keep it in vision within large scale, so it is an important research domain in robot navigation. However it has a disadvantage that the image obtained from fisheye...
Wall-climbing robots can be used for some tasks such as painting, inspecting and cleaning of various walls. The typical wall-climbing robots use a magnet or a vacuum suction device for attracting with the wall. For a reliable task, the robots should follow a desired path accurately. However, the trajectory tracking on the vertical wall is not easy because of gravitational and attraction force. In...
A soft, mobile, morphing robot is a desirable platform for traversing rough terrain and navigating into small holes. In this work, a new paradigm in soft robots is presented that utilizes jamming of a granular medium. The concept of activators (as opposed to actuators) is presented to jam and unjam cells that then modulate the direction and amount of work done by a single central actuator. A prototype...
In path planning, potential fields introduce force constraints to ensure curvature continuity of trajectories and thus to facilitate path-tracking design. In previous works, a path planning design by fractional (or generalized) repulsive potential has been developed to avoid fixed obstacles: danger level of each obstacle was characterized by the fractional order of differentiation, and a fractional...
Various solutions have been proposed for controlling the motion of mobile robots. They are generally classified into two categories: global or explicit planning and local or implicit planning. The local solutions are mainly used in unknown environments and are completely based on information provided by sensors. This paper presents a solution for controlling the motion of a mobile robot through sensors...
In path planning, potential fields introduce force constraints to ensure curvature continuity of trajectories and thus to facilitate path-tracking design. In previous works, a path planning design by fractional (or generalized) repulsive potential has been developed to avoid fixed obstacles: danger level of each obstacle was characterized by the fractional order of differentiation, and a fractional...
The computation of a mobile robot position and orientation is a common task in the area of computer vision and image processing. For a successful application, it is important that the position and orientation of a mobile robot must be determined properly. In this paper, a simple procedure for determining the orientation of the mobile robot using two cameras is presented. The two cameras are used to...
The autonomous mobile robot has some limitations for movement in ragged terrain. In some situations, it cannot move through the required target trajectories because of inappropriate type of driving system. To reduce this limitation, a new inventive concept of mechanism is presented in this paper. The mechanism is designed in a triangular shaped tracking wheel in which the inner construction can be...
This paper presents a constructive method to design output-feedback cooperative controllers that force a group of N unicycle-type mobile robots with limited sensing ranges to perform desired formation tracking, and guarantee no collisions between the robots. For each robot an interlaced observer is designed to estimate the robot unmeasured velocities. p times differentiable jump functions are introduced...
In this paper a Fuzzy Logic Controller (FLC) for path following of a four-wheel differentially skid steer mobile robot is presented. Fuzzy velocity and fuzzy torque control of the mobile robot is compared with classical controllers. To assess controllers robot kinematics and dynamics are simulated with parameters of P2-AT mobile robot. Results demonstrate the better performance of fuzzy logic controllers...
Whereas probabilistic approaches are a powerful tool for mobile robot localization, they heavily rely on the proper definition of the so-called observation model which defines the likelihood of an observation given the position and orientation of the robot and the map of the environment. Most of the sensor models for range sensors proposed in the past either consider the individual beam measurements...
In this paper we address the problem of visual navigation of a mobile robot which simultaneously obtains metric localization and scene reconstruction using homographies. Initially, the robot is guided by a human and some scenes during the trip are stored from known reference locations. The interest of this paper consist in the possibility of getting real and precise data of the robot motion and the...
This paper reviews a theory of robot motion planning and elaborates an application in which neural networks are used to take decisions regarding the orientation of a robot in its search for a destination target.The Simulink is used as a tool to implement the concepts. The neural networks allow obtaining a model of inverse dynamic, indeed the mathematical model of robot. The test was realized with...
We have developed a positioning system that uses a phased array sensor to measure the distance and direction of multiple landmarks relative to the position of a mobile robot so that the robot can self-localize. The positioning system can control the strength and the width of the beam from the phased array sensor and observe the multiple landmarks at the same time. By using the distance and direction...
This paper presents an efficient algorithm for real-time mobile robots path planning in dynamic environment. It focuses on the dynamic workspace in which the target and obstacles are moving while the boundary is stationary. The proposed algorithm improves distance-propagating system and introduces chaotic control and prediction. So it can predict the motion of target effectively and enhance the accuracy...
In this paper, a passive type dance partner robot referred to as PDR (passive dance robot) is presented to realize ballroom dances in cooperation with a human. PDR is developed based on the concept of passive robotics. Compared to the active type robot actuated by servo motors, the passive type robot can guarantee higher level of safety, since this kind of robot moves passively based on the force...
Effective prediction on the states of moving objects paves the way for successful motion planning. In this paper, particle filter is used to predict the robot position and velocity and the experimental results of target prediction in robot path planning are presented to verify its performance. Particle filter can also be combined with the system overall strategies to plan its motion and improve the...
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