Distortion of process values by N-multiplet reconciliation.
Many process control systems must reconcile an N-multiplet, a set of N replicate values, to determine the single process value for use by control programs or for applying as external output. Replication is necessary to militate against random failures or to use multiple processing cores to attain acceptable run-time performance. Increasing use of multi-cores requires reconciliation that scales with the number of cores. Scalable generic reconciliation algorithms, suitable for hardware implementation, are analyzed. The algorithms are fast and guard against multiple random failures, but distort process values in the absence of failures. Distortion is the consequence of replication followed by reconciliation. The extent of distortion is a function of the number of replications and other parameters required for unambiguous reconciliation.
Tibazarwa
Gus
G
C41-1H, Invensys Process Systems, 33 Commercial Street, Foxboro, MA 02035, USA. atibazar@foxboro.com
D000465:Algorithms; D003199:Computer Systems; D004868:Equipment Failure; D007221:Industry / Q000295:instrumentation*; D012984:Software