A key capability of any indoor service robot is to explore arbitrary, unknown environments in order to record a complete and correct map in minimal time. Such a map is a prerequisite of common tasks like surveillance,...
详细信息
ISBN:
(纸本)9789897581984
A key capability of any indoor service robot is to explore arbitrary, unknown environments in order to record a complete and correct map in minimal time. Such a map is a prerequisite of common tasks like surveillance, transportation as well as search and rescue. In recent years a series of solutions has been proposed by the authors: a dynamic enhancement of the frontier-based approach, ground plan-based exploration and a hybrid combination of both. this paper evaluates the performance of each of these strategies within an everyday office scenario in simulation and reality and discusses their pros and cons.
this paper investigates the controller design problem for the dual user haptic surgical training system. In this system, the trainer and the trainee are interfaced together through their haptic devices and the surgica...
详细信息
ISBN:
(纸本)9781538657041
this paper investigates the controller design problem for the dual user haptic surgical training system. In this system, the trainer and the trainee are interfaced together through their haptic devices and the surgical operations on the virtual environment is performed by the trainee. the trainer is able to interfere into the procedure in the case that any mistakes is made by the trainee. In the proposed structure, the force of the trainer's hands is reflected to the hands of the trainee to give necessary guidance to the trainee. the force signal is obtained from an unknown input high gain observer. the position of the trainee and the contact force withthe environment are sent to the trainer to give him necessary information regarding the status of surgical operations. Stabilizing control laws are also designed for each haptic device and the stability of the closed loop nonlinear system is proven. Simulation results are presented to show the effectiveness of the proposed controller synthesis.
Adding nonholonomic constraints in parallel manipulators, allows reduction of the actuated-joint number without affecting the reachable workspace. this principle applies to wrist robot in some underactuated designs. T...
详细信息
ISBN:
(纸本)9781538657041
Adding nonholonomic constraints in parallel manipulators, allows reduction of the actuated-joint number without affecting the reachable workspace. this principle applies to wrist robot in some underactuated designs. this paper studies steady state motion control for an nS-2SPU underactuated parallel wrist robot. First, a suitable Euler angles representation is selected and a new method for forward kinematic problem without extra sensor is proposed. Next, differential kinematics of the robot is analyzed considering first order nonholonomic constraint on angular velocity of the robot. By some manipulations, the derived equations are transformed into chain form, and a hierarchical sliding mode controller is designed for the system. Closed-loop performance of the proposed controller is compared to that of a traditional controller reported in the literature through simulations.
Nowadays, robotics is increasing its importance for the marine environment in our society. It allows to perform surveillance and data sampling tasks reducing the current cost of these tasks. this paper presents the de...
详细信息
ISBN:
(纸本)9789897581984
Nowadays, robotics is increasing its importance for the marine environment in our society. It allows to perform surveillance and data sampling tasks reducing the current cost of these tasks. this paper presents the design of a prototype of an Autonomous Surface Vessel (ASV) based on catamaran shape. It uses the screw theory for the propulsion system, which provides high manoeuvrability to the vessel. Furthermore, the parts of the ASV are designed to be printed by a RepRap 3D printer. this gives flexibility to check the performance of the vessel. Also the software control scheme of the vessel is presented.
In this paper, we introduced a novel micro swarm robotic platform, called the AttaBot, designed specifically for complex systems and swarm robotics research. the novelty of the AttaBot platform is two-folds. (1) Artif...
详细信息
ISBN:
(纸本)9789897581984
In this paper, we introduced a novel micro swarm robotic platform, called the AttaBot, designed specifically for complex systems and swarm robotics research. the novelty of the AttaBot platform is two-folds. (1) Artificial pheromones are implemented, (2) Each AttaBot has a gripper to grip small discs on the ground. In this way, AttaBot platform can be used in many different swarm scenarios including foraging, collective motion and collective transport. We introduced the design of the AttaBot, focusing mainly on the gripper design. We designed a novel gripper using off-the-shelf piezostack materials. We simulated the performance of the gripper using COMSOL and depicted the results. We showed that the current design withthe proper piezostack material is feasible and it can used in AttaBot.
the paper describes the main conclusions issued from three years of development, of which approximately eighteen months of observations, of an autonomous social robot interacting with children and adults in the Pediat...
详细信息
ISBN:
(纸本)9789897581984
the paper describes the main conclusions issued from three years of development, of which approximately eighteen months of observations, of an autonomous social robot interacting with children and adults in the Pediatrics ward of an Oncological hospital. After this long period of trials and continuous interaction, the integration of the robot in that particular social environment can be considered highly successful. the results taken from all the long run experiments yield valuable lessons in what relates social acceptance and user experience to be considered in the case of robot deployment at institutions or even at households. these are detailed in the paper.
the classical optimal path following problem considers the problem of moving optimally along a predefined geometric path under technological restrictions. In contrast to optimal path following, optimal tube following ...
详细信息
ISBN:
(纸本)9789897581984
the classical optimal path following problem considers the problem of moving optimally along a predefined geometric path under technological restrictions. In contrast to optimal path following, optimal tube following allows deviations from the initial path within a predefined tube to reduce cost even more. the present paper proposes a modern approach that treats this non-convex problem in task space. this novel method also provides a simple way to derive optimal trajectories within a tube described in terms of polygonal lines. Numerical examples are presented that allow to compare the proposed method to existing joint space approaches.
Latent Dirichlet Allocation (LDA) is a widely used machine learning technique in topic modeling and data analysis. Training large LDA models on big datasets involves dynamic and irregular computation patterns and is a...
详细信息
this work presents a fully integrated system for reliable grasping and manipulation using dense visual mapping, collision-free motion planning, and shared autonomy. the particular motion sequences are composed automat...
详细信息
this work presents a fully integrated system for reliable grasping and manipulation using dense visual mapping, collision-free motion planning, and shared autonomy. the particular motion sequences are composed automatically based on high-level objectives provided by a human operator, with continuous scene monitoring during execution automatically detecting and adapting to dynamic changes of the environment. the system is able to automatically recover from a variety of disturbances and fall back to the operator if stuck or if it cannot otherwise guarantee safety. Furthermore, the operator can take control at any time and then resume autonomous operation. Our system is flexible to be adapted to new robotic systems, and we demonstrate our work on two real-world platforms - fixed and floating base - in shared workspace scenarios. To the best of our knowledge, this work is also the first to employ the inverse Dynamic Reachability Map for real-time, optimized mobile base positioning to maximize workspace manipulability reducing cycle time and increasing planning and autonomy robustness.
Small sized robotic systems have operational advantages compared to large systems. they can also operate in fields of application where bigger systems would fail. this paper describes the specifications and the design...
详细信息
ISBN:
(纸本)9789897581984
Small sized robotic systems have operational advantages compared to large systems. they can also operate in fields of application where bigger systems would fail. this paper describes the specifications and the design of the autonomous underwater vehicle mu AUV(2). Technical details of the system regarding sensor setup, motorization and computing power are given. Furthermore, we present details about the system identification process and the implemented controller structure. Possible scopes of the mu AUV(2) are underwater exploration, inspection tasks, development and evaluation of algorithms, education and competitions.
暂无评论