Table 9 Details of G36-Cyber fault scenarios.
From: Labeled Datasets for Air Handling Units Operating in Faulted and Fault-free States
Fault type | Fault intensity | Duration* | Method of fault imposition | |
|---|---|---|---|---|
Data-intrusion attack | Temperature reset request | 15 temperature reset request | 12 p.m. to 3 p.m. on one shoulder season day (with the next 2 hours as the post-attack period). | Corrupting the number of transmitted zone temperature reset requests to 15 for five thermal zones (maximum allowed in G36) using the Max temporal model: \(\hat{y}(t)=\left\{\begin{array}{c}y(t),{t}\notin A\\ {y}_{\max },{t}\in A\end{array}\right.\) where \(\hat{y}\) is the corrupted property value, y is the original value, and A is the threat period |
Chiller on/off | Chiller cycles on/off every 30 minutes | 12 p.m. to 3 p.m. on one cooling season day (with 3 p.m. to 7 p.m. as the post-attack period). | Using square pulse model with a period of one hour on chiller on/off control signal: \(\hat{y}(t)=\left\{\begin{array}{c}y(t),{t}\notin A\\ {f}_{p}(t),{t}\in {A\; and\; c}\in [{y}_{\min },{y}_{\max }]\\ {y}_{\min },{t}\in {A\; and\; c} < {y}_{\min }\\ {y}_{\max },{t}\in {A\; and\; c} > {y}_{\max }\end{array}\right.\) | |
Supply air fan speed at max value | speed set to 100% | 7 a.m. to 7 p.m. on one cooling season day. | Using the max temporal model. | |
Zone temperature cooling setpoint to constant 22 \(^\circ C\) | — | 1 p.m. to 3 p.m. on one cooling season day (with the next 2 hours as the post attack period). | Using the constant temporal model, where property value was overwritten to a user-defined constant value \(c\) during the threat: \(\hat{y}\left(t\right)=\left\{\begin{array}{c}y\left(t\right),t\notin A\\ c,t\in {A\; and\; c}\in [{y}_{\min },\,{y}_{\max }]\\ {y}_{\min },{t}\in {A\; and\; c} < {y}_{\min }\\ {y}_{\max },{t}\in {A\; and\; c} > {y}_{\max }\end{array}\right.\) | |
DoS attack | Blocking chilled water setpoint | The CHWS temperature was continuously reset from a minimum value of 5 \(^\circ C\) to a maximum value of 10 ◦C. | 12 p.m. to 6 p.m. on one cooling season day (6 p.m. to 7 p.m. as the post-attack period). | Blocking the chiller from receiving its setpoints to use values from the previous time step, by implementing the blocking temporal model: \(\hat{y}(t)=\left\{\begin{array}{c}y(t),{t}\notin A\\ y(t-1),{t}\in A\end{array}\right.\) |
Delaying chilled water setpoint | Fixed 10-minute delay in communication network | 12 p.m. to 6 p.m. on one cooling season day. | Transmitted signal was delayed to the receivers by the delaying model: \(\hat{y}(t)=\left\{\begin{array}{c}y(t),{t}\notin A\\ y(t-\triangle t),{t}\in A\end{array}\right.\) | |
