Summary
International Symposium on Nonlinear Theory and its Applications
2017
Session Number:A1L-D
Session:
Number:A1L-D-3
A Tamper Detection Method Using Redundant Network Paths with Different Delays for Networked Control Systems
Kenta Yamada, Jin Hoshino, Ryogo Kubo,
pp.66-69
Publication Date:2017/12/4
Online ISSN:2188-5079
Summary:
There is a growing need for safe and secure networked motion control systems. This paper proposes a tamper detection method on a forward network path from a controller to an actuator. The proposed method utilizes a selector on the actuator side and redundant forward paths on which the same control signals are transmitted. In the selector, a correct signal is selected out of the received signals with or without tampering in consideration of different transmission delays on the redundant paths. The selector waits for receiving a control signal with the maximum transmission delay and compares the received signals transmitted at the same time. Experimental results using three forward paths show that the proposed method can achieve stable operation of the system even if one of the paths is tampered.