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22nd IFAC World Congress

作者： Reichhartinger, Markus Vogl, Sebastian Koch, Stefan Institue of Automation and Control Graz University of Technology Graz Austria Sebastian Vogl Christian Doppler Laboratory for Model-Based Control of Complex Test Bed Systems Institute of Automation and Control Graz University of Technology Graz Austria

ISBN: (纸本)9781713872344

A discrete-time super twisting algorithm is extended such that the windup effect is avoided in the case of limitations in the amplitude of the actuating signal. This is achieved by proposing a so-called incremental version of the discrete-time super twisting algorithm. It is shown that this version of the algorithm coincides with the original formulation of the algorithm as long as the actuating signal is not limited. However, it is also shown in this paper that it can be easily extended for windup prevention if limitations in the actuating signal occur. The proposed incremental super twisting algorithm is further modified such that in case of actuator saturation not only boundedness of the state variable of the controller is ensured, also a consistency with regard to its input-output signals is achieved. This consideration results in the so-called error recalculation super twisting algorithm. Results obtained by applying the developed algorithms in simulations and an experimental case study are presented. Copyright © 2023 The Authors. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0/)

关键词： Anti-windup Constrained control Discrete-time control algorithms Robust control Sliding mode control

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Lightweight Neural Networks Using Balanced Mel-Spectrograms for Lung Sound Analysis and Disease Classification

SSRN

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SSRN 2025年

作者： Sya’roni, Imam Yen, Chih-Ta Graduate Institue of Automation and Control National Taiwan University of Science and Technology Taipei Taiwan

Background and objective: Lung sound are the most important factor in diagnosing various respiratory diseases. Accurate and timely disease diagnosis is required during the analysis process. Artificial intelligence is the best solution for quickly and accurately analyzing disease diagnoses. This paper discusses the effectiveness of using the appropriate architecture and preprocessing model to achieve good analysis results with a few ***: The purpose of this paper is to combine a feature extraction method, namely a combination of short time fourier transform, low pass filter, and data in the form of mel-spectrogram, with a lightweight architecture, namely L-Tunnel-ConvNet and M-Tunnel-ConvNet. The architecture focuses on the combination of features extracted from mel-spectogram with a light parameter ***: The goal of these two architectures is to ensure a smooth transition from the preprocessing data block to the analysis data block. The accuracy of L-Tunnel-ConvNet is 0.9875, with overall performance metrics above 0.98, while M-Tunnel-ConvNet has an accuracy of 0.975, with overall performance metrics above ***: These two models address the need for a lightweight model that performs well in data analysis on lung sound. © 2025, The Authors. All rights reserved.

关键词： Lung cancer

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Anti-Windup Schemes for Discrete-Time Super Twisting Algorithms*

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IFAC-PapersOnLine 2023年第2期56卷 1609-1614页

作者： Markus Reichhartinger Sebastian Vogl Stefan Koch Institue of Automation and Control Graz University of Technology Graz Austria Sebastian Vogl Christian Doppler Laboratory for Model-Based Control of Complex Test Bed Systems Institute of Automation and Control Graz University of Technology Graz Austria

关键词： Robust control Anti-windup Constrained control Sliding mode control Discrete-time control algorithms

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Numerical Investigation of Cavitation Phenomena in the Pilot Stage of Deflection Flapper Servo-Valve

Numerical Investigation of Cavitation Phenomena in the Pilot...

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2020年IEEE全球流体动力学会博士生论坛

作者： Bijan Krishna Saha Songjing Li Fluid Control and Automation Harbin Institue of Technology

In order to predict the dynamic performance which may bring trouble in achieving precise control of the hydraulic control systems by generating flow cavitation phenomena,pressure fluctuation,self-excitation noise,and system jam,it is very important to analyze the failure mode,effects,mechanism,and failure rate of ***,the distribution of the flow field in the pilot stage of deflection flapper servo-valve has a serious impact on the performance of the valve and even the capability of the entire *** paper is mainly presented the three-dimensional flow modeling and simulation in the pilot stage of deflection flapper ***,since the existence of cavitation in the flow field is unavoidable in practical conditions,thus the mixture of liquid and vapor phase has considered in the calculation for turbulent *** location of cavitation distribution is identified for different inlet *** result shows that the increment of inlet pressure intensifies cavitation and output pressure plays a significant role in reducing the intensity of cavitation inside the pilot stage of deflection flapper servovalve.

关键词： Servo-valve Deflection flapper,Cavitation Computational fluid dynamics(CFD)

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Asynchronous distributed charging protocol for plug-in electric vehicles

Journal of Economy and Technology

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Journal of Economy and Technology 2023年 1卷 29-47页

作者： Yunfan Zhang Yifan Su Yue Chen Feng Liu State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China China Electric Power Planning & Engineering Institue Beijing China Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong Special Administrative Region China

The proliferation of plug-in electric vehicles (PEVs) advocates a distributed paradigm for coordinating PEV charging. Unlike existing primal-dual decomposition or consensus methods, this paper proposes a cutting-plane-based distributed algorithm considering a peer-to-peer (P2P) communication network, which enables asynchronous coordination among PEVs. First, an equivalent surrogate model is established by exploiting the duality of the original optimization problem, which masks the private information of individual users by equivalent transformation. Then, a cutting-plane based algorithm is derived to solve the surrogate problem in a distributed manner with intrinsic superiority to cope with various asynchrony. Critical implementation issues, including distributed initialization, distributed cutting-plane generation, and localized stopping criteria, are discussed in detail. Numerical tests on IEEE 37- and 123-node feeders with actual data illustrate that the proposed method is resilient to several asynchronies and admits the plug-and-play operation mode. The proposed methodology is expected to provide an alternative path toward the robust protocol for PEV charging.

关键词： Asynchronous algorithm Charging protocol Distributed optimization Plug-in electrical vehicles

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Deflector optimization in reducing cavitation intensity in the pilot stage of deflector jet servo-valve 8

Deflector optimization in reducing cavitation intensity in t...

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8th IEEE International Conference on Fluid Power and Mechatronics, FPM 2019

作者： Saha, Bijan Krishna Wu, You Li, Songjing Fluid Control and Automation Harbin Institue of Technology Harbin China

ISBN: (纸本)9781728103112

The numerical analysis is performed by using the commercial computational fluid dynamics software STAR CCM + to investigate the pressure gain coefficients, the flow field and cavitation distributions in the pilot stage under same supply pressure and return pressure with structural optimization of the deflector V-groove shape and the length of the inlet nozzle for the various deflector displacement are carried out. By analyzing with different structural parameters, possible influential parameters have been obtained contributing to flow cavitation phenomena in the pilot stage of the deflector jet servo valve. The aim of this analysis is to evaluate the deflector jet servo valve fluid dynamic performance, exploiting computational fluid dynamics (CFD) techniques, in order to give the reliable indications needed to define the deflector nozzle design criteria and avoid expensive experimental tests. Finally, the effectiveness of the innovative deflector shape in reducing cavitation intensity and overall better performance has been achieved. © 2019 IEEE.

关键词： Cavitation

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Stability Analysis of A Class of Second-Order Phase Plane control Systems:A Simulation Study

Stability Analysis of A Class of Second-Order Phase Plane Co...

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第33届中国控制与决策会议

作者： Zhihua Chen Yongchun Xie Yong Guo Kai Zhang Jinhua Guo Wangkui Liu Yong Li Zhibin Zhu Beijing Institue of Control Engineering School of Automation Northwestern Polytechnical University School of Electrical Engineering Southwest Jiaotong University Department of System Engineering China Academy of Launch Vehicle Technology

This paper investigates the stability analysis problem for a class of second-order phase plane control(PPC)systems via computer *** to the PPC method's nonlinearities arising from state-dependent switching and periodic sampling,the stability analysis problem of the closed-loop PPC system is very difficult even for the secondorder linear *** this paper,we aim at studying the stability of a class of second-order PPC systems by proposing a so-called globally uniformly ultimate boundedness(GUUB) conjecture based on the computer simulation *** particular,to a certain extent,the future proof of this conjecture will further promote the development of the stability analysis of general sampled-data switched control systems.

关键词： Phase plane control second-order system state-dependent switching periodic sampling switched system stability analysis computer simulation globally uniformly ultimately bounded spacecraft control open problem

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Deflector Optimization in reducing cavitation intensity in the pilot stage of deflector jet servo-valve

Deflector Optimization in reducing cavitation intensity in t...

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International Conference on Fluid Power and Mechatronics (FPM)

作者： Bijan Krishna Saha You Wu Songjing Li Fluid Control and Automation Harbin Institue of Technology Harbin China

ISBN: (数字)9781728103112

ISBN: (纸本)9781728103129

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Neural Style Transfer for Picture with Gradient Gram Matrix Description

Neural Style Transfer for Picture with Gradient Gram Matrix ...

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第三十九届中国控制会议

作者： Heng Jin Tian Wang Mengyi Zhang Mingmin Li Yan Wang Hichem Snoussi School of Automation Science and Electrical Engineering Beihang University College ofElectrical Engineering and Control Science Nanjing Tech University Internet of Things Technology Application Institute CASC Institue Charles Delaunay-LM2S FRE CNRS 2019University of Technology of Troyes

Despite the high performance of neural style transfer on stylized pictures,we found that Gatys et al. [1]algorithm cannot perfectly reconstruct texture *** stylized picture could emerge unsatisfied unexpected textures such like muddiness in local area and insufficient grain *** method bases on original algorithm,adding the Gradient Gram description on style loss,aiming to strengthen texture expression and eliminate *** some extent our method lengthens the runtime,however,its output stylized pictures get higher perform ance on texture details,especially in the elimination of muddiness.

关键词： art style transfer neural style transfer picture stylize Gradient Gram matrix

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Fusion moment invariant recognition of aircraft

Fusion moment invariant recognition of aircraft

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CSAA/IET International Conference on Aircraft Utility Systems, AUS 2018

作者： Zhao, Xiaojiao Han, Lei Wang, Yanbo Ren, Huimin Yang, Yang Ziliang, Shangguan System Software Department Beijing Aerospace Automic Control Institue Beijing China Automation School Beijing University of Poste and Telecommunications Beijing China

ISBN: (纸本)9781785617911

Efficient and rapid recognition of aircrafts is of great significance in the fields of air traffic control, airport monitoring and military surveillance. In this paper, a method of fusion moment invariant aircraft recognition (FMIAR) on multisource information is proposed, which can deal with the multisensor images in real-time and eliminate the influences of image translation, scaling, rotation and background noise. Furthermore, unreliable sensors can be cast off tactically to identify the aircraft type. Experiments show that FMIAR satisfies requirements of effective real-time online identification. © 2018 IET Conference Publications. All rights reserved.

关键词： Aircraft

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