Abstract

The sensitivity to damage achievable by guided wave structural health monitoring systems is limited by the repeatability of recorded signals under normal operating conditions. Direct subtraction of reference signals leads to unacceptably high post‐subtraction noise in the presence of modest temperature changes due to variations in reflections from benign structural features, hence temperature compensation is necessary. In this paper, various numerical compensation strategies are investigated. It is concluded that a combination of stretching and translating time‐traces provides reasonable compensation performance for modest temperature changes.

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