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Title: A cyber‐secure control‐detector architecture for nonlinear processes

Journal Article · · AIChE Journal
DOI: https://doi.org/10.1002/aic.16907 · OSTI ID:1582486
 [1];  [1]; ORCiD logo [2]
  1. Department of Chemical and Biomolecular Engineering University of California Los Angeles California
  2. Department of Chemical and Biomolecular Engineering University of California Los Angeles California, Department of Electrical and Computer Engineering University of California Los Angeles California
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Abstract This work presents a detector‐integrated two‐tier control architecture capable of identifying the presence of various types of cyber‐attacks, and ensuring closed‐loop system stability upon detection of the cyber‐attacks. Working with a general class of nonlinear systems, an upper‐tier Lyapunov‐based Model Predictive Controller (LMPC), using networked sensor measurements to improve closed‐loop performance, is coupled with lower‐tier cyber‐secure explicit feedback controllers to drive a nonlinear multivariable process to its steady state. Although the networked sensor measurements may be vulnerable to cyber‐attacks, the two‐tier control architecture ensures that the process will stay immune to destabilizing malicious cyber‐attacks. Data‐based attack detectors are developed using sensor measurements via machine‐learning methods, namely artificial neural networks (ANN), under nominal and noisy operating conditions, and applied online to a simulated reactor‐reactor‐separator process. Simulation results demonstrate the effectiveness of these detection algorithms in detecting and distinguishing between multiple classes of intelligent cyber‐attacks. Upon successful detection of cyber‐attacks, the two‐tier control architecture allows convenient reconfiguration of the control system to stabilize the process to its operating steady state.

Sponsoring Organization:
USDOE
OSTI ID:
1582486
Journal Information:
AIChE Journal, Journal Name: AIChE Journal Journal Issue: 5 Vol. 66; ISSN 0001-1541
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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