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arXiv · 1710.02573

Tuning Windowed Chi-Squared Detectors for Sensor Attacks

Tunga R·Carlos Murguia·Justin Ruths
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Abstract

A model-based windowed chi-squared procedure is proposed for identifying falsified sensor measurements. We employ the widely-used static chi-squared and the dynamic cumulative sum (CUSUM) fault/attack detection procedures as benchmarks to compare the performance of the windowed chi-squared detector. In particular, we characterize the state degradation that a class of attacks can induce to the system while enforcing that the detectors do not raise alarms (zero-alarm attacks). We quantify the advantage of using dynamic detectors (windowed chi-squared and CUSUM detectors), which leverages the history of the state, over a static detector (chi-squared) which uses a single measurement at a time. Simulations using a chemical reactor are presented to illustrate the performance of our tools.

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Tunga R, Carlos Murguia, Justin Ruths. 2017-10-06. Tuning Windowed Chi-Squared Detectors for Sensor Attacks. https://arxiv.org/abs/1710.02573

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