Identifying PLM Themes, Trends and Clusters Through Ten Years of Scientific Publications

Part 13: Metrics, Standards and RegulationInternational audiencePLM encompasses a wide array of expertise, from designing green products to digital factories, with perspectives ranging from an IT standpoint to business strategies, encompassing products, processes and services. Hence, identifying the contours of PLM as a science through the themes, trends and clusters of its scientific literature is very challenging. At the same time, being able to portray PLM will benefit the PLM community, including researchers and practitioners, and should help foresee its future. This work examines PLM research bibliometric trends over the last ten years. We review the scientific literature published in English from 2005 to 2014 in peer-reviewed journals and conferences. Paper keywords are analyzed so as to identify trends and reveal the clusters of related themes based on the occurrences of words and the frequency of associations between them. Amongst the findings we observe that PLM coverage is both very large (2847 keywords being used over a decade) and very thin (2134 of these keywords appear only once in the decade). We also observe that the keyword showing the highest increase is Building Information Modeling (BIM)

Human interaction with Motion Planning Algorithm

International audienceThis paper presents an interactive motion planning system to compute free collision motion in a numerical model. The system is based on interaction between a user and a motion planning algorithm. On one hand the user moves the object with an interactive device and on the other hand a motion planning algorithm searches a solution in the configuration space. The interaction aims at improving the guidance of an operator during a robot motion task in a virtual environment with the help of an automatic path planning algorithm. Existing works use a two-step decomposition which limits the interaction between the user and the ongoing process. We propose a modification of a classic motion planning method, the Rapidly-exploring Random Tree to build an Interactive-RRT. This method is based on exchanging pseudo-forces between the algorithm and the user, and on data gathering (labels) from the virtual scene. Examples are shown to illustrate the Interactive motion planning system with different interactive devices (space mouse and haptic arm). We analyze the influence of the user's dexterity to find a solution depending on various parameters of the algorithm and we show how we can adapt these parameters to a user

New Differential Geometric Methods in Nonholonomic Path Finding

We outline three approaches for nonholonomic path finding ---nilpotent approximation, highly oscillatory inputs and path deformation--- that are based on the use of the techniques of modern geometric optimal control theory, as well as a more classical one ---optimal control--- where differential geometric methods are also beginning to play a significant role. x1. Introduction In this note we will outline and compare three approaches that have recently been pursued in our work on path finding for nonholonomic systems, and will suggest adding a fourth one to this list. One of the approaches --- optimal control--- is old, but has recently attracted renewed interest due to the fact that, by making systematic use of "differential geometric methods," it now appears possible to get explicit solutions of problems that could not be handled by means of the techniques developed in the era of "classical" control theory. Two others ---nilpotent approximation and highly oscillatory inputs--- have ..