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controller confidentiality for nonlinear systems under sensor attacks

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arXiv 2022年

作者： Chong, Michelle S. The Control Systems Technology section The Department of Mechanical Engineering Eindhoven University of Technology Netherlands

controller confidentiality under sensor attacks refers to whether the internal states of the controller can be estimated when the adversary knows the model of the plant and controller, while only having access to sensors, but not the actuators. We show that the controller's state can be estimated accurately when the nonlinear closed-loop system is detectable. In the absence of detectability, controller confidentiality can still be breached with a periodic probing scheme via the sensors under a robust observability assumption, which allows for the controller's state to be estimated with arbitrary accuracy during the probing period, and with bounded error during the non-probing period. Further, stealth can be maintained by choosing an appropriate probing duration. This study shows that the controller confidentiality for nonlinear systems can be breached by balancing the estimation precision and the stealthiness of the adversary. © 2022, CC BY-SA.

关键词： controllers

Measurement-Based control for Minimizing Energy Functions in Quantum systems

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arXiv 2023年

作者： Clausen, Henrik Glavind Rahman, Salahuddin Abdul Karabacak, Özkan Wisniewski, Rafal Section for Automation and Control Department of Electronic Systems Aalborg University Aalborg Denmark Department of Mechatronics Engineering Kadir Has University Istanbul Turkey

In variational quantum algorithms (VQAs), the most common objective is to find the minimum energy eigenstate of a given energy Hamiltonian. In this paper, we consider the general problem of finding a sufficient control Hamiltonian structure that, under a given feedback control law, ensures convergence to the minimum energy eigenstate of a given energy function. By including quantum non-demolition (QND) measurements in the loop, convergence to a pure state can be ensured from an arbitrary mixed initial state. Based on existing results on strict control Lyapunov functions, we formulate a semidefinite optimization problem, whose solution defines a non-unique control Hamiltonian, which is sufficient to ensure almost sure convergence to the minimum energy eigenstate under the given feedback law and the action of QND measurements. A numerical example is provided to showcase the proposed methodology. © 2023, CC BY-NC-ND.

关键词： Hamiltonians

Contagion Propagation with Rule-Based Reasoning and Decentralized control in an Agent-Based Susceptible-Infected-Recovered-Susceptible Infodemic Model 8

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Contagion Propagation with Rule-Based Reasoning and Decentra...

8th International Conference on Big Data, Knowledge and control systems engineering, BdKCSE 2023

作者： Berceanu, Cristian Arshad, Nadia Patrascu, Monica University Politehnica of Bucharest Complex Systems Laboratory Dept. of Automatic Control and Systems Engineering Bucharest Romania University of Bergen Section for Epidemiology and Medical Statistics Dept. of Global Public Health and Primary Care Bergen Norway University Politehnica of Bucharest Complex Systems Laboratory Romania University of Bergen Centre for Elderly and Nursing Home Medicine Dept. of Global Public Health and Primary Care Bergen Norway

ISBN: (纸本)9798350313246

In recent years, and especially during the on-going pandemic, the interest in investigating the dynamics of infodemics has increased to unprecedented levels. In this study we propose an agent-based model for the spread of misinformation, disinformation, and other similar information. The model is based on the susceptible-infected-recovered-susceptible epidemic interpretation. We introduce a rule-based reasoning module to model individual bias in the perception of information based on the psychology concept of illusion of knowledge. We integrate this module into a deliberative-reactive agent controller structure and a decentralized control scheme for the multi-agent system. Results show significant differences between the outputs of the proposed model and the classical version, impressing on the effects of considering local agent individuality when modeling human psycho-social interactions. © 2023 IEEE.

关键词： Multi agent systems

Impact of diameter on D-shaped POF sensors for salt detection

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Impact of diameter on D-shaped POF sensors for salt detectio...

International Laser Technology and Optics Symposium 2024, iLATOS2024

作者： Khan, Abdul Ali Thirunavakkarasu, Punithavathi M. bte Saidin, Norazlina Noor, Ahmad Shukri Muhammad Waqas, Nawaf Communication Technology Section Universiti Kuala Lumpur British Malaysian Institute Kuala lumpur53100 Malaysia Faculty of I.C.T BUITEMS Quetta87100 Pakistan Department of Electrical and Computer Engineering International Islamic University Malaysia Kuala Lumpur53100 Malaysia Department of Computer and Communication Systems Engineering Faculty of Engineering Universiti Putra Malaysia Selangor Malaysia Department of Instrumentation and Control Engineering Universiti Kuala Lumpur British Malaysian Institute Bt. 8 Jalan Sungai Pusu Selangor Gombak53100 Malaysia

This study investigates the relationship between the diameter of a D-shaped plastic optical fiber (POF) sensor and its optical response as a function of varying salt concentrations. A simple and efficient dry etching polishing technique was employed to create D-shaped POF sensors with a range of diameters. All the fabricated sensors were carefully developed to maintain a consistent length of 20 cm with a sensing region of 1cm. To evaluate the optical intensity response, each sensor, with its respective diameter, was examined with the salt concentration ranging from (0 to 5%) examination utilizing a spectrometer. The sensor response was characterized by quantifying the variations observed in the intensity of the optical signal propagating through the sensing region. The sensors having a diameter of 500 μm, 700 μm, and 900 μm had a sensitivity of 149 A.U/%salt, 66 A.U/%salt, and 11.2 A.U/%salt respectively. The sensitivity of the 500 μm diameter sensor increased 13 times approximately as compared to the sensor having diameter of 900 μm. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Dry etching

Lifted Frequency-Domain Identification of Closed-Loop Multirate systems: Applied to Dual-Stage Actuator Hard Disk Drives

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arXiv 2025年

作者： van Haren, Max Mae, Masahiro Blanken, Lennart Oomen, Tom Department of Mechanical Engineering Control Systems Technology Section Eindhoven University of Technology Groene Loper 5 Eindhoven5612 AE Netherlands Department of Electrical Engineering and Information Systems The University of Tokyo Tokyo113-8656 Japan Sioux Technologies Esp 130 Eindhoven5633 AA Netherlands Delft Center for Systems and Control Delft University of Technology Mekelweg 2 Delft2628 CN Netherlands

Frequency-domain representations are crucial for the design and performance evaluation of controllers in multirate systems, specifically to address intersample performance. The aim of this paperis to develop an effective frequency-domain system identification technique for closed-loop multirate systems using solely slow-rate output measurements. By indirect identification of multivariable time-invariant representations through lifting, in combination with local modeling techniques, the multirate system is effectively identified. The developed method is capable of accurate identification of closed-loop multirate systems within a single identification experiment, using fast-rate excitation and inputs, and slow-rate outputs. Finally, the developed framework is validated using a benchmark problem consisting of a multivariable dual-stage actuator from a hard disk drive, demonstrating its applicability and accuracy. © 2025, CC BY-NC-ND.

关键词： Hard disk storage

Beyond Nyquist in Frequency Response Function Identification: Applied to Slow-Sampled systems

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arXiv 2023年

作者： van Haren, Max Mirkin, Leonid Blanken, Lennart Oomen, Tom Control Systems Technology Section Department of Mechanical Engineering Eindhoven University of Technology Eindhoven Netherlands Faculty of Mechanical Engineering Technion—IIT Haifa3200003 Israel Sioux Technologies Eindhoven Netherlands Delft Center for Systems and Control Delft University of Technology Delft Netherlands

Fast-sampled models are essential for control design, e.g., to address intersample behavior. The aim of this paper is to develop a non-parametric identification technique for fast-sampled models of systems that have relevant dynamics and actuation above the Nyquist frequency of the sensor, such as vision-in-the-loop systems. The developed method assumes smoothness of the frequency response function, which allows to disentangle aliased components through local models over multiple frequency bands. The method identifies fast-sampled models of slowly-sampled systems accurately in a single identification experiment. Finally, an experimental example demonstrates the effectiveness of the technique. Copyright © 2023, The Authors. All rights reserved.

关键词： Frequency response

Parameter-Varying Feedforward control: A Kernel-Based Learning Approach

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arXiv 2025年

作者： van Haren, Max Blanken, Lennart Oomen, Tom Department of Mechanical Engineering Control Systems Technology Section Eindhoven University of Technology Groene Loper 5 Eindhoven5612 AE Netherlands Sioux Technologies Esp 130 Eindhoven5633 AA Netherlands Delft Center for Systems and Control Delft University of Technology Mekelweg 2 Delft2628 CN Netherlands

The increasing demands for high accuracy in mechatronic systems necessitate the incorporation of parameter variations in feedforward control. The aim of this paperis to develop a data-driven approach for direct learning of parameter-varying feedforward control to increase tracking performance. The developed approach is based on kernel-regularized function estimation in conjunction with iterative learning to directly learn parameter-varying feedforward control from data. This approach enables high tracking performance for feedforward control of linear parameter-varying dynamics, providing flexibility to varying reference tasks. The developed framework is validated on a benchmark industrial experimental setup featuring a belt-driven carriage. © 2025, CC BY-NC-ND.

关键词： Mechatronics

Performance Analysis of Multirate systems: A Direct Frequency-Domain Identification Approach

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arXiv 2025年

Frequency-domain performance analysis of intersample behavior in sampled-data and multirate systems is challenging due to the lack of a frequency-separation principle, and systematic identification techniques are lacking. The aim of this paper is to develop an efficient technique for identifying the full intersample performance in the frequency-domain for closed-loop multirate systems, in particular the Performance Frequency Gain (PFG). Through local modeling techniques, aliased frequency components are effectively disentangled when identifying the PFG, which is directly facilitated by frequency-lifting the multirate system to a multivariable time-invariant representation. The developed method accurately and directly identifies the PFG in a single identification experiment. Finally, the developed method is experimentally validated on a prototype motion system, showing accurate identification of frequency-domain representations for the multirate system, including the PFG. © 2025, CC BY-NC-ND.

关键词： Frequency domain analysis

Model Predictive control for Lane Merging Automation with Recursive Feasibility Guarantees

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IFAC-PapersOnLine 2023年第2期56卷 4858-4864页

作者： M.E. Geurts A. Katriniok E. Silvas W.P.M.H. Heemels Department of Mechanical Engineering Control Systems Technology Section Eindhoven University of Technology The Netherlands Ford Research & Innovation Center (RIC) Aachen Germany Department of Integrated Vehicle Safety TNO Helmond The Netherlands

In order to make the complex driving task of merging safer, in this paper we consider the automated merging of an autonomous vehicle into a mixed-traffic flow scenario (i.e., traffic including autonomous and manually driven vehicles). In particular, we propose a novel MPC-based algorithm to perform a merging procedure from a double lane into a single lane and continue with (adaptive) cruise control ((A)CC) functionality after the merge. The proposed MPC balances fast progress along the path with comfort, while obeying safety and maximum allowed velocity bounds. Recursive feasibility, leading to safety and proper behavior, is guaranteed by the design of a proper terminal set, extending existing ones in the literature. The on-line MPC problem is translated into a mixed integer quadratic program (MIQP) that can be solved for global optimality. Through numerical simulations we demonstrate the behavior and effectiveness of the proposed MPC merging scheme.

关键词： Autonomous vehicles Predictive control Trajectory Tracking and Path Following Nonlinear and optimal automotive control Safety