منابع مشابه
Mobile robot tracking of pre-planned paths
A method of mobile robot steering control around pre-planned paths is presented. The system can manœuvre accurately at low speeds by deriving control parameters as functions of vehicle velocity. The peak demand on the steering controller is reduced, by distributing steering curvature changes evenly over the extent of a manœuvre.
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Complex plans are required to safely operate an autonomous system in a dynamic environment. An ideal planner would build all reactions offline so it could deliberate as long as necessary to develop its response set. However, it may be impossible to build and store all plans offline, so online planning is required whenever previously unplanned-for situations arise. In a dynamic system, online pl...
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2 Abstract Every rail operator wishes to minimise the size of their locomotive fleet in order to reduce costs. This minimum fleet size problem requires a rail operator to allocate locomotives to the trains in a predefined train schedule so that the total number of locomotives required is minimised. The key to this is deciding how and when to transfer locomotives to where they can be better util...
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Ejection seats are inherently unstable during high and low speed ejections unless positive stabilization devices are incorporated. Today’s expanded 103 to 245 pound aircrew size range further challenges seat stability. The USAF ACES II seat is by far the most stable ejection seat in the world under low speed conditions. The ACES II is stabilized at zero to low airspeed with the STAPAC rocket as...
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This paper compares the advantages and disadvantages o f the "pre-planned" and "postplanned" approaches to evaluating program effectiveness. These evaluative approaches are compared along a number o f dimensions which include: (a) Reliability o f data and the cost o f collecting it; (b) Internal validity; (c) External validity; (d) Evaluation obtrusiveness and threat; and (e) Program goal displ...
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ژورنال
عنوان ژورنال: Nature
سال: 1979
ISSN: 0028-0836,1476-4687
DOI: 10.1038/279007b0