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Cybersecure PMLSM Control System With Updatable Homomorphic Encryption
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DOI：10.1109/access.2026.3716674.png)
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Abstract
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This study develops an encrypted position control system for an industrial-grade iron-cored permanent magnet linear synchronous motor (PMLSM) of Acc-max (Registered trademark) (NEOMAX Engineering Co., Ltd.) to enhance the security of control devices. The proposed control design procedure encompasses detent force attenuation using a squared-sinusoidal function, disturbance observer design, and velocity and position controller design. The derived control algorithm involving a multiplicative homomorphic encryption scheme uses encrypted data, resulting in control operations with encrypted communications and control parameters. This secure implementation of the controller contributes countermeasures against cyberattacks and reverse engineering. This study demonstrates the effectiveness of the developed position control system for the iron-cored PMLSM in terms of tracking control performance and real-time detection of cyberattacks, such as falsification and replay attacks.
Keywords:
Cyberattack
cyber-physical systems
encrypted control
nonlinear control systems
precision engineering
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