Excavating
Patent
1990-10-09
1993-06-22
Baker, Stephen M.
Excavating
371 683, 371 113, 395575, G06F 1100
Patent
active
052220656
ABSTRACT:
Measuring signals are derived from a plurality of redundantly provided sensors, the sensor signals of which are sampled and digitized at a predetermined rate, and are processed by computers also provided redundantly. Each of the computers processes the sensor signals with a main program and a monitoring program. A first computer is arranged to process in each computing cycle (n) sensor signals sampled in a predetermined sampling cycle (n), which is preferably identical with the computing cycle. Further computers are provided. Each of the further computers processes in each computing cycle n the sensor signals which have been sampled in sampling cycles (n-1), (n-2), (n-3), respectively, which lead the computing cycle by predetermined time intervals. A fault logic serves to make decisions on program faults from the output data obtained with the main program and the monitoring program in the various computing cycles.
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patent: 4590549 (1986-05-01), Burrage et al.
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IBM Technical Disclosure Bulletin, "Advanced Test System (ATS) for Software Test", vol. 30, No. 9, Feb. 1988, pp. 134-137.
A paper by Fischler and Firschein-"A Fault Tolerant Multiprocessor Architecture for Real-Time Control Applications", Proceedings of the Annual Symposium on Computer Architecture, University of Florida, 9-11 Dec. 1973, New York.
Baker Stephen M.
Bodenseewerk Geratetechnik GmbH
Hua Ly V.
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