50 research outputs found

    Neural Extended Kalman Filter for State Estimation of Automated Guided Vehicle in Manufacturing Environment

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    To navigate autonomously in a manufacturing environment Automated Guided Vehicle (AGV) needs the ability to infer its pose. This paper presents the implementation of the Extended Kalman Filter (EKF) coupled with a feedforward neural network for the Visual Simultaneous Localization and Mapping (VSLAM). The neural extended Kalman filter (NEKF) is applied on-line to model error between real and estimated robot motion. Implementation of the NEKF is achieved by using mobile robot, an experimental environment and a simple camera. By introducing neural network into the EKF estimation procedure, the quality of performance can be improved

    Prediction of Robot Execution Failures Using Neural Networks

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    In recent years, the industrial robotic systems are designed with abilities to adapt and to learn in a structured or unstructured environment. They are able to predict and to react to the undesirable and uncontrollable disturbances which frequently interfere in mission accomplishment. In order to prevent system failure and/or unwanted robot behaviour, various techniques have been addressed. In this study, a novel approach based on the neural networks (NNs) is employed for prediction of robot execution failures. The training and testing dataset used in the experiment consists of forces and torques memorized immediately after the real robot failed in assignment execution. Two types of networks are utilized in order to find best prediction method - recurrent NNs and feedforward NNs. Moreover, we investigated 24 neural architectures implemented in Matlab software package. The experimental results confirm that this approach can be successfully applied to the failures prediction problem, and that the NNs outperform other artificial intelligence techniques in this domain. To further validate a novel method, real world experiments are conducted on a Khepera II mobile robot in an indoor structured environment. The obtained results for trajectory tracking problem proved usefulness and the applicability of the proposed solution

    Power Electronics Applications in Renewable Energy Systems

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    The renewable generation system is currently experiencing rapid growth in various power grids. The stability and dynamic response issues of power grids are receiving attention due to the increase in power electronics-based renewable energy. The main focus of this Special Issue is to provide solutions for power system planning and operation. Power electronics-based devices can offer new ancillary services to several industrial sectors. In order to fully include the capability of power conversion systems in the network integration of renewable generators, several studies should be carried out, including detailed studies of switching circuits, and comprehensive operating strategies for numerous devices, consisting of large-scale renewable generation clusters

    Air Traffic Management Abbreviation Compendium

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    As in all fields of work, an unmanageable number of abbreviations are used today in aviation for terms, definitions, commands, standards and technical descriptions. This applies in general to the areas of aeronautical communication, navigation and surveillance, cockpit and air traffic control working positions, passenger and cargo transport, and all other areas of flight planning, organization and guidance. In addition, many abbreviations are used more than once or have different meanings in different languages. In order to obtain an overview of the most common abbreviations used in air traffic management, organizations like EUROCONTROL, FAA, DWD and DLR have published lists of abbreviations in the past, which have also been enclosed in this document. In addition, abbreviations from some larger international projects related to aviation have been included to provide users with a directory as complete as possible. This means that the second edition of the Air Traffic Management Abbreviation Compendium includes now around 16,500 abbreviations and acronyms from the field of aviation

    Google and Apple’s Gale of Creative Destruction.

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    Creative destruction is an economic theory of innovation popularised by Austrian economist Joseph Schumpeter. In this paper, Schumpeter’s theories are used to explain how radical technological innovations in information-intensive industries are influencing the erosion of traditional industry and market boundaries leading to the emergence of new competitive business models and strategies. Developments in digital technology has resulted in new technological shifts and market linkages resulting in dilemmas for the existing incumbents in traditional industries who find themselves increasingly trapped and victims of a new innovation logic. The new value innovation logic is being driven by entrepreneurs such as Page and Brin (Google) and Jobs (Apple) who are currently in the process of revolutionising the economic structures of many industries and creating new markets and organisational business models in a gale of creative destruction reminiscent of the theories developed by Sombart and Schumpeter. This creation of new market models and their impact on established industries are explained further in the value chain evolution theory and its corollary sustaining innovation classification-scheme. These theories reinforce the view that innovators, thinking in new and radical ways, provide sustainable new market developments and earn above the average revenues compared to incumbents, whose profit pools have eroded. This paper researches and analyses the impact that Google and Apple are having upon a broad range of information-intensive industries and the strategic options of the incumbent firms in the respective traditional industries in response to this radical change. Its purpose is to provide explanations of why and how radical innovators are able to redefine the rules of the market leading to economic growth and development. Keywords: creative destruction, prosumer, monetize, incumbents, institutionalizatio
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