bluuebunny/crossref_metadata_2025_split huggingface dataset:
Finite Element Analysis and Topology Optimization Design of Seat Bracket for New Energy Bus
Authors: Zhang Enguang , Wang Li 
Published: June 2020

Abstract
This paper used NX8.0 to carry out the finite element analysis and topology optimization design of the electric bus seat bracket and the mechanical properties before and after optimization are compared. The results show that when the volume is reduced by 8.9%, the maximum deformation is reduced by 47.8%, the maximum stress is reduced by 66%, the average deformation is reduced by 50%, and the average stress is reduced by 54%. In this process, light weight is achieved, and the mechanical properties of the product are improved significantly. All processes are completed under the same software, which ensures the data consistency and editability. As the case involves new energy vehicles, parametric design, finite element analysis and topology optimization design, it is introduced into the CAE course as a project case under the background of “new engineering” and achieves good results.
Nonlinear Robust Control of a Stewart Parallel Robot
Authors: Chen Liang , Sun Hanxu , Jia Qingxuan , Yu Tao , Zhao Wei 
Published: June 2020

Abstract
In this paper, the control problem of a Stewart parallel robot is investigated, and a sliding mode control method based on self-tuning sliding mode disturbance compensator and double power reaching law is presented. The presented control method can realize fast regulation of a Stewart parallel robot system, and has good robustness and adaptability towards the system uncertainties. The design of a self-tuning sliding mode disturbance compensator is included in the presented control method. The designed sliding mode disturbance compensator does not need the upper bound information of the system uncertainties, and can accurately estimate the system uncertainties. The double power reaching law can not only ensure fast convergence of the system states, but also maintain the continuity of the sliding mode controller. Lyapunov stability theory is adopted to prove the stability of the closed-loop control system, and the validity of the presented control method is verified by a numerical simulation test.
Design and implementation of infrared lamp automatic screening system
Authors: Ge Zheyang , Dong Hao , Wen Jing , Zhang Xi , Wang Qingyu 
Published: June 2020

Abstract
To improve the efficiency of infrared lamp screening during the vacuum thermal environment test, an automatic screening system for infrared lamps is designed in this paper. The paper first introduces the main indicators required for the infrared lamp screening system and the main components of the system. The detailed design of each part of the system was completed on the basis of investigating the relevant detection methods according to the needs of use. Specifically, it includes mobile device design, circuit design, and software design. According to the design scheme, the machining of each part was completed and the main body of the instrument was assembled. Using the assembled system to complete the automatic test of infrared lamp screening, the test results meet the needs. In addition, the system has a high degree of automation, which greatly improves the work efficiency.
Fault Detection of Areo-engine Actuator Based on Adaptive Radial Basic Function Observer
Authors: Li Dingzhe , Peng Jingbo , Li Shuaiguo , Wang Weixuan , Xu Ruosong 
Published: June 2020

Abstract
Aiming at the fault detection problem of aero-engine actuators, a fault diagnosis method for aero-engine actuators based on adaptive RBF network observer is proposed. Firstly, the system model is established for the faulty actuator, and then the observer-based actuator fault diagnosis principle is established. Secondly, for the problem that the traditional observer is not sensitive to the gradual fault, the nonlinear approximation characteristics of the RBF network are used. The adaptive fault observer design method based on RBF network is applied. At the same time, the sufficient conditions for the convergence of the observer error system are given by using the Lyapunov stability analysis method. Finally, the simulation experiments of different types of actuators for a turbofan engine are carried out. The results show that the adaptive RBF observer designed in this paper is more effective in detecting faults and has certain fault estimation ability.
Establishment of polynomial regional ionospheric delay model by using GNSS dual-frequency combined observations
Authors: Li Weiguo , Chen Yanhong 
Published: June 2020

Abstract
The Global Navigation Satellite System (GNSS) is currently one of the more effective observation methods for measuring the Total Electron Content (TEC) of the ionosphere. At the same time, the ionospheric delay is also one of the most serious error sources affecting the accuracy of GNSS technology. The establishment of the ionospheric model can eliminate and weaken the delay error and improve the accuracy of navigation and positioning. There are many existing ionospheric delay models. For small regions, the ionospheric delay error is usually polynomial model, but the parameters and precision of the polynomial model are not studied deeply. In this paper, by means of Continuously Operating Reference Station (CORS) and precise ephemeris, the data is preprocessed and the combined observation of the P code pseudo-ranges is smoothed by combined observations, so that polynomial ionospheric delay model with different parameters and joint hardware delay of receiver and satellite are generated. And then the accuracy of the model is analyzed and evaluated, it can be concluded that the parameter value of the polynomial regional ionospheric delay model (i=2,k=3) is appropriate, the Klobuchar model can correct the ionospheric delay error from 2.5m to 3.5m, the polynomial model can reach 0.263m or even higher, especially in today’s multi-frequency and multi-satellite system development.
Design of UWB snowflake slot antenna based on Koch fractal
Authors: Wang Liang , Cao Liping , Liu Guijie , Sun Xubao 
Published: June 2020

Abstract
There are many forms of wide-slot aperture printed antennas. This paper presents a new type of ultra-wideband antenna with compact structure from the fractal field. The slot structure of the antenna is composed of the third iteration of the Koch curve, and the tri-band is achieved by etching the snowflake slot on the side of the Rogers RT/duroid 5880 dielectric substrate with a relative dielectric constant of 2.2 and a thickness of 1.6 mm. On the other side, a hexagonal adjustment branch is used to enhance the coupling between the slot and the feeder to widen the bandwidth. The test results show that the antenna’s operating frequency band covers 2.2 to 13.4GHz. The H-plane radiation is omnidirectional, and the gain peak up to 10dB, which is suitable for ultra-wideband wireless communication.
Application of T-Test Method in The High Temperature Test of Air Traffic Control Monitoring Equipment in Civil Aviation
Authors: Yang Yuhang , Zhang Ye , Zhang Huaicai , Luo Qiming 
Published: June 2020

Abstract
Civil aviation ATC equipment needs to fully consider whether it meets environmental requirements before being put into operation. This article introduces the classification of air traffic control equipment and the different harsh environments to which various types of equipment will be subjected. It also introduces the details of the various effects of high temperature on the equipment. Then, taking the high temperature test of the secondary surveillance radar of the civil aviation ATC as an example, this article detailly introduces the test steps according to GB2423.2 for carrying out the high temperature test of this type of equipment. The receiver’s dynamic range was tested during the test. After the test, the test results were calculated using the t-test method. Then, the calculated results are compared with the t-distribution critical value table to judge whether the equipment has passed the high temperature test.
Design of Animal Detector Based on Thermal Imaging Sensor
Authors: Wang Zhaoming , Liu Xiaomin 
Published: June 2020

Abstract
Wandering in the city of stray animals to the life of urban residents, sanitation, safety, etc., bring a lot of trouble and become a thorny problem in urban management. In order to facilitate the search and rescue of stray animals by animal protection organizations, a low-cost animal detection system based on infrared thermal imaging technology was designed in this paper. Based on the infrared thermal imaging technology, the system adopts the Atmega328 microcontroller as the control core, and uses the infrared array senor to detect the external infrared radiation and converts the voltage fluctuations caused by the thermal radiation into digital signals through the built-in ADC. The master control convseudo color images through SPI bus, and interacts with the system through ESP8266 to acherts the temperature information collected by AMG8833, controls the color LCD to display infrared pieve remote control. The infrared detection system has the advantages of small size, low power consumption, low cost, wireless communication and portability. It can realize the search and rescue of small animals in urban areas and the monitoring function of indoor animals.
Degree of Articulatory Dispersion: An Introduction to a Model of Coarticulation
Authors: Hanbin Zhang 
Published: June 2020

Abstract
The purpose of the study is to introduce a new Model of Coarticulation, namely, Degree of Articulatory Dispersion. This paper reviews the Models of Coarticulation, and then the validity of the Degree of Articulatory Dispersion is proved by finding the correlation between the dispersion of DAD and the slope of LEM in the four groups of Monguor consonants classified by the manner of articulation. The finding shows that there is a significant negative correlation between the dispersion of DAD and the slope of LEM. Therefore, Degree of Articulatory Dispersion can be a valid Model of Coarticulation to measure the degree of coarticulation.
The motor testing system design based on SINAMICS S120 inverter
Authors: Zhengtang Liu , Xiangdong Li , Lin Zhang 
Published: June 2020

Abstract
In this paper, an induction motor testing system based on Sinamics S120 inverter is designed and implemented. This system adopts Siemens S7-300 programmable controller as the main control unit, and the Sinamics S120 inverter as the actuator of the companion and subject motors. Because the whole working process is fully automatic controlled by PLC, it has high working reliability. All inverters on one DC generatrix decrease power consumption and have remarkable energy-saving effect and practical value.
Analysis and Treatment Process of abnormal manual Shutdo wn of 1000MW thermal Power Unit
Authors: Ruifu Song , Zhizheng Du 
Published: June 2020

Abstract
The unit 2 of a power plant was shut down manually due to the fire detection fault of coal seam and oil layer. The paper analyzes the specific causes of the incident, points out the problems exposed in the production process, and puts forward the handling and preventive measures.
Development of Distributed Low Voltage Distribution Remote Monitoring System
Authors: Hu Xie Hong , Chen Qiong 
Published: June 2020

Abstract
Intelligent power distribution monitoring technology is an important technology to improve the intelligence and automation level of the power distribution system. However, because the current power distribution monitoring methods in low-voltage power distribution rooms are not very developed, regular manual inspections and manual data recording are needed, leading to efficiency very low, so the research and development of intelligent distribution monitoring system in low-voltage distribution room is very necessary.This system is mainly composed of intelligent electrical parameter collection terminal, 4G data transmission module, Alibaba Cloud Internet of Things platform, and remote power host computer, and each device can perform effective data communication. The system is assigned to each low-voltage power distribution room for unified management and viewing. The low-voltage power distribution real-time monitoring system can realize the real-time monitoring of transformer parameters and wireless transmission, and control the 4G communication module to receive or send data to the Alibaba Cloud Internet of Things platform. The remote cloud can monitor and query electrical parameters in real time, and can also send control instructions to the intelligent collection terminal. The terminal host receives various data (such as the three-phase voltage and current of the transformer, active and reactive power, power factor, frequency, harmonics, environmental temperature and humidity, etc.) from the data collector in real time and analyzes it. Once the data exceeds The set threshold will cause an alarm to prevent potential safety hazards in the low-voltage power distribution room. The experimental results prove that the system can monitor the working status of various electrical equipment in the power distribution room in real time, accurately and efficiently, thereby ensuring the safety and stability of the entire power distribution system, and has certain research value.
Design of Voltage Source for Step Response Calibration System of DC Voltage Transformer
Authors: Zhai Shaolei , Liu Jing , Wei Ling , Chen Ye , Deng Tao 
Published: June 2020

Abstract
Aiming at the lack of the theory and test methods for the transient characteristics of DC (direct-current) transformers and the difficulty of the existing test power supply to meet the test requirements, the step response characteristics of the transformers are studied by designing the step voltage source system of the DC voltage transformers. Capacitor energy storage technology design capacitor energy storage square wave power supply. At the same time, the control loop uses voltage feedback to improve the output voltage stability. The simulation results show that the top of the waveform of the step voltage source system is very flat, there is no obvious overshoot at the leading edge of the output voltage waveform, the stabilization time is much less than 100 μs, and the leading edge rise time is less than 10 μs, which meets the system requirements.
Design and Development of the High Voltage Capacitor Step-down Power-taking Device
Authors: Shuai Zhang , Cong Ma , Peng Wu , Lin Xing 
Published: June 2020

Abstract
The designed device uses high voltage capacitor in series with a voltage transformer to take power. It uses the capacitance voltage resistance and the transforming characteristics of voltage transformer, and the monitoring system is supplied with power by subsequent rectifier filtering and switching circuit. As high voltage capacitor step-down has the problem of limited energy, the set of device uses voltage transformer to increase power output, and the required power are provided to the load end on the basis of the changing of the load end power, and through the relay’s on or off to control the connection or disconnection of the front-end resistance. 10kv voltage transformer are used for 110kv line, and the primary side voltage of the voltage transformer is controlled at 10kV by using the voltage stabilizing function of the rear-connected circuit. Through The overall test of power output is stable, the device operates well.can provide stable and effective low-voltage power supply for the on-line detection device of 110kV high-voltage multiple circuit..
Research and Analysis on Relay Protection of AC-DC Hybrid Distribution Network
Authors: Zhao Xiaomin , Yang Bingyuan 
Published: June 2020

Abstract
The construction of Alternating Current and direct current (AC-DC) hybrid distribution networks is the future development trend. Due to the large number of distributed generation (DG) and power electronic devices, the fault characteristics on the AC side are more complicated. At the same time, due to the control strategy and topology, conventional protection methods has adaptability problems to the power system containing power electronics equipment. Therefore, it is of great significance to study the adaptability analysis of AC-DC hybrid distribution network protection to ensure the safe and reliable operation. This paper summarizes the research on the topological structure, fault characteristics, and protection principles, then analyzes the impact of AC-DC interactions on the protection configuration of the AC-DC hybrid distribution networks.
Wireless Transmission Important Technology and its Impact on the Grid
Authors: Shuai Zhang , Peng Wu , Lin Xing , Ning Wang , Yan Li , Yuan Hu , Shuo Wang 
Published: June 2020

AbstractWith the progress of science and technology, wireless transmission has entered people’s field of vision as a new transmission method. This paper describes the background of wireless transmission technology, and then introduced in detail the short distance transmission of electromagnetic induction, the basic principle of magnetic resonance coupling transmission, and the long-distance transmission of microwave laser, and then discusses the development of wireless transmission technology in detail, and then introduced the important technology that need to be focused on nowadays. Finally, the impact of wireless transmission technology on the grid and its future development direction are illustrated from three perspectives including smart grid introduction, power transmission and distribution, and distributed power supply.
Research on fault diagnosis method of 750kV substation based on Bayesian network and fault recording information fusion
Authors: Shang Poli , Dong Haiying , Li Xiaonan , Ren Wei 
Published: June 2020

Abstract
Aiming at the complexity of the 750kV substation system and the uncertainty of the fault information, this paper studies the fault diagnosis method of Bayesian network and fault recording information. In order to solve the problem of single-source, DS evidence theory is used to fuse the two diagnosis results. Through case analysis, it is proved that the method can effectively improve the accuracy of fault diagnosis.
Analysis and Rectification of Power Line Conducted Emission Test Exceeding Standards
Authors: Shichao Guo , Dandan Guo , Qiongyu Zhang , Nankai Wu , Jiaxin Deng 
Published: June 2020

Abstract
The power transmission emission test (CE102) is the key to electromagnetic compatibility (EMC) testing. The device exceeded the limit at multiple frequencies in the CE102 test. The analysis was performed to locate the curve. The filter was selected based on the frequency characteristics of the filter components and the DC-DC conversion was performed. The harmonic emission of the switching frequency of the converter was analyzed and effectively suppressed. The filter module circuit was set according to the characteristics of the interference source, the key parameters of the filter module was calculated, the rectification method was formulated, and CE102 test was performed again to determine the accuracy of the rectification plan.
Simulation and Analysis of Frequency Hopping Communication Jamming
Authors: Zhang Xiaolu , Quan Houde , Cui Peizhang , Sun Huixian 
Published: June 2020

Abstract
In modern warfare, the victory of electronic warfare has become one of the key factors affecting the victory of war. It is an important part of electronic warfare that high-efficiency jamming is used to interfere with enemy frequency hopping (FH) communication systems. Firstly, Simulink is used to establish models of a FH communication system, noise jamming, tone jamming, sweep jamming, and follower jamming. Secondly, performance of the four jamming is analyzed. Finally, bit error rate (BER) is used to evaluate and compare the performance of them.
Research on Visual Control System of Inverted Pendulum Based on Pixel Displacement
Authors: Liu Bing , Zhan Bin , Zhang Changda , Yang Lisi 
Published: June 2020

Abstract
In inverted pendulum visual servo control system (IPVSCSs), how to achieve the fast and effective measurement of the state information of the inverted pendulum is an important task. In this paper, the characteristics of the inverted pendulum are considered and a series of image processing and positioning algorithm of the pendulum are proposed. Furthermore, the inverted pendulum control system model based on the pixel displacement is established and the LQR controller is designed. Finally, the feasibility and superiority of the proposed method are verified by real-time control experiments.
Design of Multi-point Intelligent Temperature Monitoring System for Transformer Equipment
Authors: Na Qu , Wen You 
Published: June 2020

Abstract
With the development and progress of industrial technology, the temperature range of factory substations is required strictly, and most of the temperature measuring devices widely used in the market at present are single-point measurements, with the disadvantages of slow transmission speed and imprecision, etc., it is disadvantageous for the controller of the substation equipment to make a decision in time according to its temperature change. This subject is based on single-chip microcomputer as the core of the control components, the acquisition temperature through the acquisition channel multiplexing technology, to achieve multi-point temperature monitoring and recording. A temperature measurement and control system is composed of a / D conversion photosensitive triode, a temperature sensor and a light intensity acquisition, detection and display. The temperature sensor is controlled by a single-chip microcomputer to collect the temperature, and the temperature is fed back to the single-chip microcomputer to make corresponding analysis and processing, it has powerful data processing function, intuitive display, friendly interface and high cost performance, and can be widely used in industrial and agricultural control, mechatronics engineering, smart home and many other fields.
Control Strategy of Coolant Flow Rate and Temperature of Battery Pack Based on Double Fuzzy Controller
Authors: Zhao Yang , Wang Hengfu , Zhou Qinkai , Luo Yuan , Zhang Meixia 
Published: June 2020

Abstract
The temperature and flow rate of coolant have a great influence on the performance of the cooling system. Too low temperature of coolant will increase the temperature difference between single batteries, and too high temperature will not be conducive to battery cooling. If the flow rate of coolant is too high, it will lead to the increase of system energy consumption and reduce the vehicle’s mileage, but too low flow rate of coolant will lead to the increase of battery temperature, which will bring safety risks. In order to solve these problems, this paper takes both the maximum temperature and the maximum temperature difference of the battery into consideration and proposes a double fuzzy controller. Compared with the step control scheme, the maximum temperature is reduced by 3 °C, and the maximum temperature difference is reduced by 1.75 °C, and the energy consumption is reduced by 13.3%.
Research on Kernel-Distance-Based AEWMA-t Control Method
Authors: Yang Yatang , Chen Fumin , Tian Yiyu 
Published: June 2020

Abstract
Aimed at the complex data correlation among multivariate quality characteristics of products, inability to obey the assumptions of traditional control methods, low data volume in small and medium batch production, and inaccurate parameter estimation in process control, an AEWMA-t control method based on kernel distance data is proposed. Firstly, based on the support vector data description algorithm, the hypersphere is trained by normal samples. Then the kernel distance from the sample to the center of the hypersphere is calculated and the kernel distance is normally converted. Finally, the process is controlled with AEWMA-t control method. Case analysis shows that, compared with the traditional multivariate control methods, this method has good ability to detect anomalies in the mean deviation interval of each process, and is not restricted by the distribution and size of the data samples.