Title :
Masking failures of multidimensional sensors
Author :
Chew, Paul ; Marzullo, Keith
Author_Institution :
Dept. of Comput. Sci., Cornell Univ., Ithaca, NY, USA
fDate :
30 Sep-2 Oct 1991
Abstract :
A methodology for transforming a process control program that cannot tolerate sensor failure into one that can is presented. In this methodology, a reliable abstract sensor is created by combining information from several real sensors that measure the same physical value. To be useful, an abstract sensor must deliver reasonably accurate information at reasonable computational cost. The authors consider sensors that deliver multidimensional values (e.g. location or velocity in three dimensions). Geometric techniques are used to derive upper bounds on abstract sensor accuracy and to develop efficient algorithms for implementing abstract sensors
Keywords :
electric sensing devices; fault tolerant computing; process computer control; real-time systems; failures masking; geometric techniques; multidimensional sensors; process control program; real-time systems; reliable abstract sensor; upper bounds; Actuators; Chemical sensors; Concrete; Contracts; Fault tolerance; Multidimensional systems; Process control; Redundancy; Thermal sensors; Uncertainty;
Conference_Titel :
Reliable Distributed Systems, 1991. Proceedings., Tenth Symposium on
Conference_Location :
Pisa
Print_ISBN :
0-8186-2260-1
DOI :
10.1109/RELDIS.1991.145402