Nostrum: Constraint Directed Diagnosis

Nuttall, Simon (1990). Nostrum: Constraint Directed Diagnosis. PhD thesis The Open University.

DOI: https://doi.org/10.21954/ou.ro.0000fc56

Abstract

This thesis describes the design, implementation and use of NOSTRUM, a computer program that diagnoses faults in electrical and mechanical devices. The diagnosis is driven from a model of the components of the device. The model itself represents the operating principles of the component parts of the device. By choosing to model the operating principles on a constraint based system it is easy to predict the consequences of infringement of those operating principles, and also to back propagate from an observed symptom to a hypothesized fault.

NOSTRUM interacts with the user, proposing tests to perform on the device and asking if the predicted consequences of a hypothesis are observed. NOSTRUM allows experiential knowledge in the form of fault models to be added to modify and speed up its search strategy.

At a general level NOSTRUM can perform diagnosis in novel situations, pinpointing a break in the structure of the device whilst not necessarily being able to describe the nature of that break.

Viewing alternatives

Download history

Metrics

Public Attention

Altmetrics from Altmetric

Number of Citations

Citations from Dimensions

Item Actions

Export

About

Recommendations