Author(s)

Jixin Ma & B. Knight

Abstract

A model for temporal management in process control Jixin Ma & B. Knight School of Mathematics, Statistics & Computing, The University of Greenwich, London SE18 6PF, ABSTRACT Temporal reasoning plays an essential role in many process control systems, where the history of processes is an important factor in deciding operational control. A problem with traditional historical databases is that the volume of historical data required can become very large and lead to unnecessary inefficiencies. In this paper, we give a general system for the efficient management of temporal histories using application specific knowledge to determine the storage form. The system is based on an extension of Allen's interval based temporal logic. An illustrative example of the system as applied to process control is provided. 1. INTRODUCTION In modelling some portion of the real world, in many cases, one is not only interested in the representation of a present state, but also in the history of

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