1,720,979 research outputs found
Virtual planning for autonomous inspection of electromechanical products
No full textAbstract High quality electromechanical products require sophisticated and costly diagnostic tools to ensure the absence of defects in the final artefacts. The main requirements for reliability tests are flexibility, sensor sharing and early defect detection. The aim is the substitution of the current practice based on manual checking of few samples with standardized and repeatable quality control carried out by autonomous mobile platforms. Virtual planning of the inspection tasks, the simulation of the navigation in a poorly structured environment as well as the interaction with the product, are crucial aspects which have been faced through a dedicated system framework. The paper proposes a solution composed of a software for the virtual planning and simulation of inspection tasks, hardware setup composed of an autonomous platform with sensors and actuators, and a service oriented software infrastructure for navigation and perception. Consistent paths to be followed by the robot are elaborated in a graphical environment on the basis of inspected product locations and measuring tasks. The system has been implemented for household appliance inspection in reliability laboratories where life tests are carried out under real operation conditions. The results in terms of inspection mission planning capabilities and localization performances are presented
A Vision-Based Guidance System for UAV Navigation and Safe Landing using Natural Landmarks
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A single-camera feature-based vision system for helicopter autonomous landing
No full textIn this paper a feature based single camera vision system for the safe landing of an unmanned aerial vehicle (UAV) is proposed. The autonomous helicopter used for tests is required to navigate from an initial to a final position in a partially known environment, to locate a landing area and to land on it. The algorithm proposed for the detection of safe landing areas is based on the analysis of optical flow and of mutual geometric position of different kinds of features, observed from different points of view. Vision allows estimating the position and velocity of a set of features with respect to the helicopter while the onboard, hierarchical, behavior-based control system autonomously guides the helicopter. Results, obtained using real data and a real helicopter in a outdoor scenario, show the appropriateness of the vision-based approach. It does not require any artificial landmark (e.g., helipad), is able to estimate correctly and autonomously safe landing areas and is quite robust to occlusions
A Framework for Flexible and Autonomous Reliability Tests of Household Appliances Supported by Virtual Planning
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A Service Oriented Architecture Supporting an Autonomous Mobile Robot for Industrial Applications
No full textThis paper presents the design and implementation of a control system for autonomous navigation based on a Service Oriented Architecture (SOA) supporting a mobile robot suitable for industrial applications. The robot is required to perform generic high-level tasks in indoor structured environments. The control architecture, developed within the Microsoft Robotics Developer Studio (MRDS), allows to encapsulate the controller functionalities as a set of services that interact and exchange data among them. This approach allows to guarantee flexibility, scalability and reliability. The accurate testing, carried out in simulated and real environments, shows good real-time performances
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