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49th International Congress and Exposition on Noise Control engineering, INTER-NOISE 2020

作者： Takács, Gergely Mikuláš, Erik Vrícan, Martin Gulan, Martin Slovak University of Technology in Bratislava Faculty of Mechanical Engineering Institute of Automation Measurement and Applied Informatics Námestie slobody 17 Bratislava812 31 Slovakia

ISBN: (纸本)9788994021362

Battery powered embedded applications of active vibration control must conserve energy as much as possible, in order to prolongate effective service time between charging. Besides the power requirements of actuators and sensors, the microcontroller unit executing the feedback control algorithm drains the battery as well. Reducing the current drain of the microcontroller is possible by slowing down its clock frequency;or, sending the device into sleep mode when idle. This paper attempts to provide a definitive answer as to which of these strategies is better. A simple theoretical approximation derived here suggests that running the microcontroller at maximum frequency, then sending it to a low power mode is always preferable. We confirm this by laboratory experiments measuring the microcontroller power requirements of the positive position feedback algorithm. For this algorithm and choice of sampling time a five-fold current saving is possible on the Microchip (Atmel) ATmega 328p microcontroller unit, reducing its current draw from 15 mA to 3 mA. The experimental current and instantaneous power measurements shown in the paper confirm our prediction and general conclusion. © Proceedings of 2020 International Congress on Noise Control engineering, INTER-NOISE 2020. All rights reserved.

关键词： Microcontrollers

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CONCEPT OF DELIVERY SYSTEM IN THE SMART CITY ENVIRONMENT

arXiv

引用

arXiv 2023年

作者： Špitálová, Zuzana Leontiev, Oliver Harmaňoš, Patrik Institute of Computer Engineering and Applied Informatics Faculty of Informatics and Information Technology Slovak University of Technology Bratislava Slovakia

Regarding to the smart city infrastructures, there is a demand for big data processing and its further usage. This data can be gained by various means. There are many IoT devices in the city, which can communicate and share the information about the environment which they are situated in. Moreover every personal mobile device can also participate in this process and help to gain data via various applications. Every app provides the useful data, enabling the location and data sharing. This data can be further processed and used for improving the city infrastructure, transport or other services. We designed the system for shared delivery process, which can help to achieve the described situation. It consists of frontend and backend part. The frontend part, multiplatform mobile app, represents the graphical interface and the backend part represents the database for the gained data. © 2023, CC0.

关键词： Smart city

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Uncertainty analysis and robust control of temperature fields of casting mould as distributed parameter systems

Uncertainty analysis and robust control of temperature field...

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作者： Belavý, C. Hulkó, G. Rohal'-Il'kiv, B. Buček, P. Noga, P. Institute of Automation Measurement and Applied Informatics Slovak University of Technology in Bratislava Faculty of Mechanical Engineering Nám. Slobody 17 81231 Bratislava Slovakia

ISBN: (纸本)9783902661432

In the paper, an uncertainty analysis and simulation of a robust control of temperature fields of the casting mould in the benchmark casting plant are presented. Temperature fields are supposed as distributed parameter systems with dynamic models in the form of lumped-input/distributed-output system. For this representation, uncertainty of the controlled system was considered and robust control synthesis with internal model control structure was designed. Simulation of the robust control of the temperature field in the casting mould was carried out using the Distributed Parameter Systems Blockset for MATLAB & Simulink - Third-party MathWorks product. © 2009 IFAC.

关键词： Uncertainty analysis

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Lockstep Vs Microarchitecture: A Comparison

Lockstep Vs Microarchitecture: A Comparison

引用

IEEE International SOC Conference

作者： Ján Mach Lukáš Kohútka Pavel Čičák Institute of Computer Engineering and Applied Informatics Slovak University of Technology Bratislava Slovakia Institute of Informatics Information Systems and Software Engineering Slovak University of Technology Bratislava Slovakia

ISBN: (数字)9798350377569

ISBN: (纸本)9798350377576

Safety/mission-critical applications require high dependability of the control systems. Their state-of-the-art protection approach is a system-level lockstep. This paper compares the system-level dual and triple lockstep technique to the microarchitecture-level protection of the Hardisc RISC-V core. For a fair comparison, each system is based on the same core(s) and integrates protection against bit-flips in memory and transient faults in the bus. We propose a fault injection methodology, combining pre-synthesis simulation with synthesis data to analyse the vulnerability of a system to faults. The fault injection campaigns show that the Hardisc can withstand fault rates orders of magnitude higher than the dual-core lockstep system while preserving the same area and power consumption. It comes with a 5% frequency penalty. We have shown that system failures are more frequent once the fault rate reaches an application-specific threshold (one fault in 100 clock cycles).

关键词： Fault tolerance Microarchitecture Power demand Event detection Fault tolerant systems Registers System-on-chip Protection Transient analysis Clocks

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Adaptive model predictive vibration control with state and parameter estimation using extended kalman filtering

Adaptive model predictive vibration control with state and p...

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20th International Congress on Sound and Vibration 2013, ICSV 2013

作者： Takács, Gergely Polóni, Tomáš Rohal'-Ilkiv, Boris Slovak University of Technology in Bratislava Faculty of Mechanical Engineering Institute of Automation Measurement and Applied Informatics Nám Slobody 17 812 31 Bratislava Slovakia

ISBN: (纸本)9781629931500

This paper presents an adaptive-predictive vibration control system using extended Kalman filtering for the joint estimation of system states and model parameters. A fixed-free cantilever beam equipped with piezoceramic actuators is used to test the proposed control strategy. Deflection readings taken at the end of the beam are used to reconstruct position and velocity information for a second order state-space system. In addition to the system states, the dynamic model is augmented by the unknown model parameters: stiffness, damping constant and a voltage/force conversion constant;characterizing the actuating effect of the piezoceramic transducers. The states and parameters of this augmented system are estimated in real-time, using a continuous-discrete hybrid extended Kalman filter. The estimated model parameters are used to reconstruct the continuous state-space model of the vibrating system, which in turn is discretized for the predictive controller. The model predictive control algorithm generates state predictions and infinite-horizon quadratic cost prediction matrices based on the updated discrete state-space models. The resulting cost function is then minimized using quadratic programming to find the sequence of optimal but constrained control inputs, from which only the first is utilized in a form of a control voltage send to the piezo actuators, the rest is discarded and the procedure is repeated at the next sampling instant. The proposed active vibration control system is implemented and evaluated experimentally to validate the viability of the control method.

关键词： Model predictive control

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The statistical methods for the management of the measurement process 15

The statistical methods for the management of the measuremen...

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15th Conference on applied Mathematics 2016, APLIMAT 2016

作者： Jenčuráková, Dana Palenčár, Rudolf Slovak University of Technology in Bratislava Faculty of Mechanical Engineering Institute of automation Measurement and Applied Informatics Námestie slobody 17 Bratislava812 31 Slovakia

ISBN: (纸本)9788022745314

Contribution constitutes the statistical process control of the measurement process in the laboratory conditions. Using appropriate statistical methods points to the real state of the measurement process. Presentation of used control charts and other methods highlights the merits of their applications. To supplement the methods with the cumulative sum chart and the Kalman filtering is the consideration on the experience in the regulation of the statistical measurement processes control.

关键词： Control charts

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Integrating V2X solutions in intelligent green cities: an AI-driven point exchange system approach

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Neural Computing and Applications 2025年

作者： Talaat, Fatma M. Shaban, Warda M. ZainEldin, Hanaa Badawy, Mahmoud Elhosseini, Mostafa Faculty of Artificial Intelligence Kafrelsheikh University Kafrelsheikh Egypt Faculty of Computer Science & Engineering New Mansoura University Gamasa35712 Egypt Department of Communication and Electronics Engineering Nile Higher Institute for Engineering and Technology Mansoura Egypt Faculty of Artificial Intelligence and informatics Horus University New Damietta Egypt Computers and Control Systems Engineering Department Faculty of Engineering Mansoura University Mansoura35516 Egypt Computer Science and Information Department Applied College Taibah University Madinah42353 Saudi Arabia College of Computer Science and Engineering Taibah University Yanbu46421 Saudi Arabia

With rapid urbanization, smart cities have become essential for enhancing urban management and sustainability by integrating technological, social, and institutional innovations. Among these innovations, vehicle-to-everything (V2X) communications and electric vehicles (EVs) play a critical role in reducing carbon emissions and optimizing urban mobility. To address the existing gaps in holistic V2X integration, this paper presents a novel eco-assistive fog-based traffic management system (EAFTMS) that leverages a four-tier architecture (IoT, fog, cloud, and application) for scalable, real-time traffic optimization. A key innovation of this system is the AI-driven point exchange system (PES), designed to incentivize sustainable behaviors such as reducing unnecessary vehicle usage and promoting green lifestyle choices. Unlike conventional models, the proposed framework incorporates real-time behavioral monitoring, rewards-based sustainability programs, and V2X-enabled dynamic traffic control. Empirical validation demonstrates that EAFTMS outperforms existing models, including support vector regression (SVR), achieving a 30% reduction in latency, a 40% improvement in response time, a 25% increase in traffic flow efficiency, and a 35% reduction in CO2 emissions. These results highlight the framework’s potential to set new standards in intelligent green cities by offering scalable, practical, and environmentally impactful solutions to urban transportation challenges. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2025.

关键词： Urban transportation

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Hardened Processor Architecture

Hardened Processor Architecture

引用

International Conference on Mixed Design of Integrated Circuits and Systems (MIXDES)

Processors for terrestrial applications are protected by Earth's atmosphere and magnetic field, so the probability of single event effects (SEE) is significantly lower. Shrinking of the technology nodes allows higher operational frequency and performance, but their susceptibility to SEE is increasing. Nowadays satellites and safety critical automotive applications require more and more computational power. The hardening by design has been implemented mainly by redundancy of the whole cores. The consequences are lower frequency, larger area, and higher power consumption. We propose a novel hardening technique, which enables high frequency operation and doesn't cause large power consumption and area overhead. The protection is based redundancy and separation of the pipeline into two main sections. It provides a fast detection of faults, simple recovery by flush of the pipeline, and allows a large prediction unit to be unprotected. The whole protection scheme can be implemented at the Register Transfer Level. We present the protection scheme at the core with RISC-V instruction set. Simulations confirm the protection can handle the injected faults. Synthesis shows, the protection lowers the maximum frequency by only about 4.7%. The area increase is only about 118% and can be even lower.

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Influence of Structural Units on Vulnerability of Systems with Distinct Protection Approaches

Influence of Structural Units on Vulnerability of Systems wi...

引用

Euromicro Symposium on Digital System Design

作者： Ján Mach Lukáš Kohútka Pavel Čičak Institute of Computer Engineering and Applied Informatics Slovak University of Technology Bratislava Slovakia Institute of Informatics Information Systems and Software Engineering Slovak University of Technology Bratislava Slovakia

ISBN: (数字)9798350380385

ISBN: (纸本)9798350380392

Mission/safety-critical applications rely on the dependability of their semiconductor control systems. The lockstepping is state-of-the-art when it comes to their protection. This paper compares the dual/triple lockstep systems with the Hardisc, which features microarchitecture-level protection. For a fair comparison, each system is based on the same architecture and integrates protection against bit-flips in memory and transient faults in the bus. We analyse how individual structures of the system affect the vulnerability of a system to faults. Our fault injection methodology combines pre-synthesis simulation with synthesis data to scale the fault rate of the structures according to their size. The results show that the Hardisc can withstand fault rates orders of magnitude higher than the dual-core lockstep system while preserving the same area and power consumption. It comes with a 5% frequency penalty. The pipeline logic has the most significant impact on the vulnerability of the lockstep system. On the other hand, the ECC-protected register file constraints the maximum failure rate the Hardisc can withstand due to fault accumulation during specific program sections.

关键词： Fault tolerance Power demand Microarchitecture Digital systems Pipelines Fault tolerant systems Registers Logic Protection Transient analysis

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Interface Protection Against Transient Faults

Interface Protection Against Transient Faults

引用

IEEE Design and Diagnostics of Electronic Circuits and Systems (DDECS)

Increasing bus frequency to fulfill the performance requirements of dependable applications may increase the susceptibility of the system to transient faults. This paper describes an integration of protection against transient bus faults into the interface of the Hardisc RISC-V core. The protection is based on information redundancy with spatial redundancy features. It enables uninterrupted execution in the presence of transient faults and provides a hardware-software interface for its reporting. The benchmarking results indicate that most of the applications will be impacted minimally. The protection has a negligible impact on the maximal frequency and 8% area and power consumption overhead.

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