Error Recovery in Automation - An Overview

This paper attempts to provide an overview of techniques and approaches to error recovery, both in automation and in other fields (such as autonomous robotics) where analogous problems occur. The term `error recovery' is often used as a common name for the three sub areas error/fault detection, error/fault diagnose, and recovery from the resulting failure. All three areas will be covered. Rather than presenting different systems and approaches in-depth, different types of systems and approaches will be presented and compared. Terminology The first observation made is that there is a lack of common terminology, e.g. the word error is sometimes used to denote the original reason why something went wrong, whereas in other cases it is used to denote the effects in the computer system due to some unforeseen event. However, in the `reliable computing' community there is an emerging standard [Laprie, 1992]. Although they are primarily interested in problems internal to a computer and its sof..

Databases in Control and Simulation

This position paper describes the real-time database research at the Real-Time Systems Laboratory, Linköping University. The current research involves the application of database technology to the control and simulation of physical processes and has two main directions: adequate activity languages to describe high level operations on objects in the environment or in the simulation, and mechanisms to embed databases into control and simulation systems, and adequate data structures. 1 Introduction Our work focuses on the application of databases in real-time software systems and, more specifically, the application dependent requirements put on the embedded database and the realization of the corresponding database technology to satisfy these requirements. In this position paper, we describe our approach to embedding real-time databases in control systems and simulators. This paper will describe our approach in both aspects. We will also discuss the similarities between control and simu..