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Method of Single Event Effects Radiation Hardened Design for DC-DC Converter Based Load Transient Detection

Chinese Journal of Electronics 2024年第5期33卷 1154-1164页

作者： Zhongjie GUO Nan LIU Hu LU Mengli LI Ziyi QIU School of Automation and Information Engineering Xi'an University of Technology

Aiming at the impact of load current change on single-event transient, the essential difference between single-event transient and load transient of DC-DC converter is deeply studied. A hardened circuit based on load transient detection is proposed. The circuit detects the load transient information in time and outputs a control signal to control the single event hardened circuit, thereby realizing the improvement of the transient characteristics of the system under dynamic conditions. Based on the 180 nm bipolar-CMOS-DMOS（BCD） process, the design and physical verification of a boost converter are completed. The experimental results show that the input voltage range is 2.9–4.5 V, the output voltage range is 5.8–7.9 V, and the load current is 0–55 mA. During load transients, the load detection circuit turns off the hardened circuit in time, avoiding system oscillation and widening the dynamic range of the hardening circuit. Under the single-event transient, the output voltage fluctuation of the system does not exceed the maximum ripple voltage, and the single-event transient suppression ability reaches more than 86%, the system can work well with linear energy transfer of about 100 Me V·cm2/mg.

关键词： Voltage fluctuations Fluctuations Radiation hardening (electronics) Energy exchange DC-DC power converters Dynamic range Transient analysis

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Design Method of Anti-Total Ionizing Dose Effect Hardening for Buck-Boost Converter

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Journal of Beijing Institute of technology 2024年第6期33卷 589-604页

作者： Zhongjie Guo Hu Lu Yuan Ren Nan Liu Ziyi Qiu Mengli Li School of Automation and Information Engineering Xi’an University of TechnologyXi’an 710048China

Buck-Boost converter in the total dose radiation environment will mainly bring the output voltage drift, linear adjustment rate and load adjustment rate decline and other effects, so that the output stability performance of the circuit deteriorates. Aiming at the problems of high cost,large layout area and poor universality caused by the traditional total ionizing dose effect hardening method based on process and layout, this paper proposes a total ionizing dose effect hardening design method with parallel monitoring and hardening, which can achieve total ionizing dose effect hardening at the circuit level without process. The anti-total dose capability of Buck-Boost converter is improved. The circuit design and physical implementation of the proposed method are verified based on 0.18 μm bipolar complementary metal-oxide-semiconductor(CMOS) double-diffused metal-oxide-semiconductor(DMOS)(BCD) process. The results show that the system gain decrease rate can be compensated from 19.2% to 6.2%, and the output voltage shift rate can be improved from 2.00% to 0.15% at a dose of 200×10^(3) rad(Si). Moreover, the load adjustment rate and linear adjustment rate are reduced. They are respectively decreased to 0.191 %/A and 0.093 %/V. This provides a new idea for the design of total ionizing dose effect hardening at circuit and system level.

关键词： radiation hardened total ionizing dose Buck-Boost converter error amplifier

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π-phase-shifted two-plus-one method for non-diffuse surface

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Chinese Optics Letters 2023年第10期21卷 36-43页

作者：王建华杨延西徐鹏 School of Information and Control Engineering Qingdao University of TechnologyQingdao 266520China School of Automation and Information Engineering Xi’an University of TechnologyXi’an 710048China

We propose a method for reconstructing non-diffuse surfaces based on theπ-phase-shifted two-plus-one phase-shifting ***,we introduce a 2fH+a+2fM+2f_(L)method for unwrapped phase ***,we introduce a new set ofπ-phase-shifted 2fH+a/2+2fM+2f_(L)fringe patterns with halved background *** saturated pixels will be replaced with the unsaturated pixels in theπ-phase-shifted fringe ***,we analyze eight fringe replacement cases and give the corresponding phase calculation,and further give the general *** confirm that the sum of the phase error of the proposed method is 81.4%lower than that of the traditional method,and 61.5%lower than that of the adaptive fringe projection method.

关键词： non-diffusion π-phase shift two-plus-one phase shift

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Performance Analysis of Hybrid FSO/RF-THz Relay Communication System

IEEE Photonics Journal

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IEEE Photonics Journal 2024年 1-10页

作者： Liang, Jingyuan Chen, Minghui Ke, xizheng College of Automation and Information Engineering Xi'an University of Technology Xi'an China

In the connection between the last kilometer access network and the backbone network, the dual-hop hybrid free-space optical-radio frequency (FSO-RF) relay system is considered to be an effective solution to increase the capacity and coverage of the wireless communication system. However, the transmission performance of FSO link is greatly affected by atmospheric turbulence, pointing errors and weather such as fog and snow, and the RF access network has low rate and relatively high delay. To ensure communication quality, a hybrid FSO/RF-terahertz (THz) relay system has been designed. Decode-and-forward relay is selected, and the hybrid FSO/RF communication based on adaptive combining scheme is considered before the relay node, and THz link is used after the relay node to access the users. Using the statistical characteristics of different links obtained, expressions for the outage probability and average bit error rate of the system were derived. The effects of different parameters on the performance of hybrid FSO/RF-THz relay system is studied, and the first hop adaptive combining scheme is compared with the single-threshold switching scheme and the single-link FSO system. The analysis results indicate that the hybrid FSO/RF-THz relay system can provide better outage and bit error rate performance by using the adaptive combining scheme, which can improve the system communication rate while taking into account the communication reliability. Authors

关键词： Signal to noise ratio

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Research and application of composite stochastic resonance in enhancement detection

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Chinese Physics B 2024年第1期33卷 264-273页

作者：高蕊焦尚彬薛琼婕 School of Automation and Information Engineering Xi'an University of TechnologyXi'an 710048China School of Electronic and Electrical Engineering Baoji University of Arts and SciencesBaoji 721016China Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an University of TechnologyXi'an 710048China

Aiming at the problem that the intermediate potential part of the traditional bistable stochastic resonance model cannot be adjusted independently, a new composite stochastic resonance(NCSR) model is proposed by combining the Woods–Saxon(WS) model and the improved piecewise bistable model. The model retains the characteristics of the independent parameters of WS model and the improved piecewise model has no output saturation, all the parameters in the new model have no coupling characteristics. Under α stable noise environment, the new model is used to detect periodic signal and aperiodic signal, the detection results indicate that the new model has higher noise utilization and better detection ***, the new model is applied to image denoising, the results showed that under the same conditions, the output peak signal-to-noise ratio(PSNR) and the correlation number of NCSR method is higher than that of other commonly used linear denoising methods and improved piecewise SR methods, the effectiveness of the new model is verified.

关键词： Woods–Saxon improved piecewise model composite stochastic resonance(SR) image denoising

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K-Corruption Intermittent Attacks for Violating the Codiagnosability

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 159-172页

作者： Ruotian Liu Yihui Hu Agostino Marcello Mangini Maria Pia Fanti IEEE the Department of Electrical and Information Engineering Polytechnic University of Bari the School of Automation Xi'an University of Posts and Telecommunications

In this work, we address the codiagnosability analysis problem of a networked discrete event system under malicious attacks. The considered system is modeled by a labeled Petri net and is monitored by a series of sites, in which each site possesses its own set of sensors, without requiring communication among sites or to any coordinators. A net is said to be codiagnosable with respect to a fault if at least one site could deduce the occurrence of this fault within finite steps. In this context, we focus on a type of malicious attack that is called stealthy intermittent replacement attack. The stealthiness demands that the corrupted observations should be consistent with the system's normal behavior, while the intermittent replacement setting entails that the replaced transition labels must be recovered within a bounded of consecutive corrupted observations(called as K-corruption intermittent attack). Particularly, there exists a coordination between attackers that are separately effected on different sites, which holds the same corrupted observation for each common transition under attacks. From an attacker viewpoint, this work aims to design Kcorruption intermittent attacks for violating the codiagnosability of systems. For this purpose, we propose an attack automaton to analyze K-corruption intermittent attack for each site, and build a new structure called complete attack graph that is used to analyze all the potential attacked paths. Finally, an algorithm is inferred to obtain the K-corruption intermittent attacks, and examples are given to show the proposed attack strategy.

关键词： Codiagnosability decentralized structure discrete event system intermittent attack Petri net

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An enhanced equivalent input disturbance approach to current control of PMSM with periodic and aperiodic disturbances

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Science China(information Sciences) 2025年第3期68卷 272-285页

作者： Tao YANG Youwu DU Bo LI Weihua CAO Chuanke ZHANG Jinhua SHE School of Electrical & Information Jiangsu University of Technology School of Automation China University of Geosciences School of Engineering Tokyo University of Technology

The current-loop control of a permanent magnet synchronous motor(PMSM) system suffers from periodic and aperiodic disturbances, which result in current ripples and degrade control performance. This paper presents an enhanced equivalent-input-disturbance(EID) approach to reject periodic and aperiodic disturbances in the current loop of a *** additional quasi-resonant compensators(QRCs) are integrated into a conventional EID estimator with a low-pass filter(LPF) to handle the disturbances. The configuration of an enhanced EID(EEID)-based control system for PMSM current loop is explained. An analysis in the frequency domain shows the mechanism of the presented method for rejecting periodic and aperiodic disturbances simultaneously. It reveals that the sensitivity reduction of the system for aperiodic disturbances is mainly determined by the bandwidth of the LPF and that for periodic disturbances is determined by the parameters of the *** stability of the system is analyzed using the Nyquist stability criterion. The design algorithm for system parameters is provided. Compared to the conventional EID approach, the proposed method provides an additional degree of freedom to deal with periodic disturbances. The design of the QRCs is independent of each other, which makes the proposed method flexible and easy to implement. The effectiveness and the superiority of the EEID approach are validated by simulation results of a PMSM system.

关键词： equivalent input disturbance (EID) disturbance rejection permanent magnet synchronous motor (PMSM) periodic and aperiodic disturbances quasi-resonant compensator

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Turbulent drag reduction by sector-shaped counter-flow dielectric barrier discharge plasma actuator

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Chinese Physics B 2025年第2期34卷 362-370页

作者： Borui Zheng Shaojie Qi Minghao Yu Jianbo Zhang Linwu Wang Dongliang Bian School of Automation and Information Engineering Xi’an University of TechnologyXi’an 710048China School of Mechanical and Precision Instrument Engineering Xi’an University of TechnologyXi’an 710048China Science and Technology on Plasma Dynamics Laboratory Air Force Engineering UniversityXi’an 710038China Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi’an 710048China Shaanxi University Key Laboratory of Photonic Power Devices and Discharge Regulation Xi’an 710048China

The primary objective in aircraft transportation is to minimize turbulent drag, thereby conserving energy and reducing emissions. We propose a sector-shaped counter-flow dielectric barrier discharge plasma actuator, which leverages jet synthesis for drag reduction. A drag control experiment was conducted in a low-speed wind tunnel with a controlled flow velocity of 9.6 m/s(Re = 1.445 × 10^(4)). This study investigated the effects of varying pulse frequencies and actuation voltages on the turbulent boundary layer. Using a hot-wire measurement system, we analyzed the pulsating and time-averaged velocity distributions within the boundary layer to evaluate the streamwise turbulent drag reduction. The results show that the local TDR decreases as the pulse frequency increases, reaching a maximum reduction of approximately 20.97% at a pulse frequency of 50 Hz. In addition, as the actuation voltage increases, the friction coefficient decreases, increasing the drag reduction rate. The maximum drag reduction of approximately 33.34% is achieved at an actuation voltage of 10 kV.

关键词： plasma flow control turbulent boundary layer turbulent drag reduction

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Prediction of collapse process and tipping points for mutualistic and competitive networks with k-core method

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Chinese Physics B 2024年第5期33卷 173-180页

作者：段东立毕菲菲李思凡吴成星吕长春蔡志强 School of Information and Control Engineering Xi'an University of Architecture and TechnologyXi'an 710311China School of Mechanical Engineering Northwestern Polytechnical UniversityXi'an 710072China

Ecosystems generally have the self-adapting ability to resist various external pressures or disturbances,which is always called ***,once the external disturbances exceed the tipping points of the system resilience,the consequences would be catastrophic,and eventually lead the ecosystem to complete *** capture the collapse process of ecosystems represented by plant-pollinator networks with the k-core nested structural method,and find that a sufficiently weak interaction strength or a sufficiently large competition weight can cause the structure of the ecosystem to collapse from its smallest k-core towards its largest *** we give the tipping points of structure and dynamic collapse of the entire system from the one-dimensional dynamic function of the *** work provides an intuitive and precise description of the dynamic process of ecosystem collapse under multiple interactions,and provides theoretical insights into further avoiding the occurrence of ecosystem collapse.

关键词： complex networks tipping points dimension reduction k-core

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Influencer identification of dynamical networks based on an information entropy dimension reduction method

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Chinese Physics B 2024年第4期33卷 375-384页

作者：段东立纪思源袁紫薇 School of Information and Control Engineering Xi'an University of Architecture and TechnologyXi'an 710311China School of Mechanical Engineering Northwestern Polytechnical UniversityXi'an 710072China

Identifying critical nodes or sets in large-scale networks is a fundamental scientific problem and one of the key research directions in the fields of data mining and network science when implementing network attacks, defense, repair and *** methods usually begin from the centrality, node location or the impact on the largest connected component after node destruction, mainly based on the network ***, these algorithms do not consider network state *** applied a model that combines a random connectivity matrix and minimal low-dimensional structures to represent network *** using mean field theory and information entropy to calculate node activity,we calculated the overlap between the random parts and fixed low-dimensional parts to quantify the influence of node impact on network state changes and ranked them by *** applied this algorithm and the proposed importance algorithm to the overall analysis and stratified analysis of the *** neural *** observed a change in the critical entropy of the network state and by utilizing the proposed method we can calculate the nodes that indirectly affect muscle cells through neural layers.

关键词： dynamical networks network influencer low-dimensional dynamics network disintegration

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