bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Simulation Analysis of Soil Cutting Process by Ditcher
Authors: Zhang Zihan , Song Yuepeng , Ren Longlong , Zhang Hongmei 
Published: June 2020

Abstract
Ditching and fertilizing is the important components of the orchard working. In order to achieve modern agricultural requirements for energy saving and drag reduction, the mechanism of ditching blade on soil during soil cutting process was studied, and the tool structure and parameters were optimized. This paper numerically simulated the soil cutting process of disc type ditcher blade based on SPH method by ANSYS/LS-DYNA. Simulation result showed that the SPH method can directly simulate the whole process of cutting the soil with the ditch cutter. The maximum Von Mises stress and cutting force are 4 MPa and 350N. The Von Mises stress of soil and cutting force had small fluctuation, so that the cutting is stable. The power consumption was approximately 0.35 kW at steady state, and the cutting consumption obtained by theoretical analysis is similar to the simulation result. By theoretical analysis, the viability of SPH method on simulating the soil cutting process of disc type ditcher blade was verified.
Automatic ship detection in SAR Image based on Multi-scale Faster R-CNN
Authors: Zhou Yiqing , Cai Zemin , Zhu Yuting , Yan Jingwen 
Published: June 2020

Abstract
Automatic ship detection of synthetic aperture radar (SAR) images has been widely used in maritime surveillance. SAR images have the characteristics of all-weather, all-day detection. Therefore, many object detection methods ranging from traditional to deep learning techniques have been proposed. However, the objects in large-scale remote sensing images are relatively small, and objects are often appeared at different scales. What’s more, the current ship detection methods are insensitive to small-scale vessels. To solve these problems, a novel multi-scale ship detection method based on a Multi-scale Faster R-CNN network in SAR images is proposed in this paper. Firstly, a multi-scale network is used to decompose the SAR images into a pyramid structure and extract the features. Then, the region proposal network (RPN) is performed using the feature map for each layer to get the proposals that contains ship targets. Finally, these proposals are fed to the classification and regression network to obtain the final detection results. Multi-scale Faster R-CNN achieves the mean average precision(mAP) score 0.986 on the dataset of SAR-Ship-Dataset, which indicates that the proposed method has high detection accuracy and low missing rate.
Optimization of Machining Craft of Engine Block Based on Numerical Control Process Technology
Authors: Baolin Xia 
Published: June 2020

Abstract
This paper introduces the general and numerical control machining technology of the important surface of the engine block, and focuses on the relevant methods and measures to ensure the quality of high-speed milling and boring. Some methods and measures of optimization based on NC machining technology are proposed. The application of optimization in engine block machining cases is briefly listed. To ensure the quality of the engine block, improve its efficiency, and reduce its cost, opinions and suggestions that can be used for reference are provided.
Markov decision process of optimal energy management for plug-in hybrid electric vehicle and its solution via policy iteration
Authors: Fan Jie , Ou Yang , Wang Peng , Xu Lei , Li Zhe , Zhu HongGuo , Zhou Zhou 
Published: June 2020

Abstract
This paper proposes a Markov decision process based optimal energy management strategy for plug-in hybrid electric vehicle with a hybrid energy storage system, which mainly consists of an ultracapacitor, a power battery pack and a DC/DC converter. Firstly, the mathematical model is built for the overall system. Secondly, based on modified worldwide harmonized light duty test cycle, the power transition probability matrix is constructed to describe the Markov property of driver’s power demand in natural driving. Then by combining the stochastic property of driver’s power demand and deterministic state transition of the hybrid powertrain system, the energy management optimization problem is formulated into a typical Markov decision process. Finally, the derived optimization problem is solved by policy iteration and the corresponding optimal control map is generated. The optimality of the solution is investigated and discussed in detail.
Method for testing output limit of AVR in AC exciter excitation system
Authors: Zhu Yingfeng , Zhang Yongming , Xie Xiaosu , Yuan Xunkui 
Published: June 2020

Abstract
The excitation system of synchronous generator plays an important role in the static and dynamic stability of power system. ‘Guide for modelling generator excitation system’ requires that the excitation system of new generators should be modelled and remodelled when the excitation system is upgraded. Testing the output limit of AVR is an important content of modelling. Considering inability of tetsing the output limit of AVR in AC exciter excitation system, this paper analyzes the reason using test data firstly, then proposes a new method to test the output limit of AVR, by modifying the maxim firing angle, the output limit can be got, the new method is verified during modelling test of a 145MW generator finally.
Research on tire model parameter identification strategy based on CDTire/3D
Authors: Gao F L , Zhan N , Bu X B , Li X R , Wu Y 
Published: June 2020

Abstract
High accuracy tire modeling is essential to study the automotive fatigue-durability, handling-stability, and NVH performance in the virtual proving ground. Compared with other tire models, CDTire/3D can be directly used in multi-body dynamics simulation, and its linearized version can be adopted in road noise analysis. In consideration of its high generality for cost saving, CDTire/3D has an extensive engineering application prospective in the automotive industry. It is the critical technique to accomplish high-efficiency and high-precision CDTire/3D modeling by investigating the mechanical mechanism of tire and the influence of parameters on all test conditions, based on which a parameter identification strategy is conducted in this paper. The effectiveness of the strategy is verified by a tire modeling case.
Progress and Innovations of Ice Slurry Generation Based on Scraped-surface Method
Authors: Han Zhi , Ma Qingwen , Fang Yunrui , Hua Linhui , Jin ChengKun , Huang Jianghua 
Published: June 2020

Abstract
In recent years, as a new type of ice storage medium, ice slurry has been widely applied in multiple fields. The scraped-surface method has remained the focus of researches, thanks to its advantages such as technical maturity, low cost and stable performance, etc. In this paper, the attributes of ice slurry was briefly introduced and then an analysis and comparison of several common ice slurry generation methods was presented with a summary of the advantages of the scraped-surface method. Then, the current research status of scraping-type ice slurry generation method was introduced. In the final place, this paper would summarizes the existing research fruition and propose a zigzag scraper, and future development and trend are looked forward to.
Steady State Drifting Controller for Rear-Wheel Independent Driving Electric Vehicels
Authors: Huang Chengfeng , Yin Dejun 
Published: June 2020

Abstract
The use of independent driving electric vehicels for extreme sports is a matter to consider. This paper presents a steady-state drift controller for rear-wheel independent driving electric vehicels. The controller is based on linear quadratic regulator technology. A drift equilibrium condition calculator is designed based on the longitudinal force pre-distribution of rear tires and the Pacejka tire model. The results are used as the system reference input. Finally, the CarSim-MATLAB/Simulink co-simulation is carried out to verify the controller.
Field Modification and Application of ODAF Cooling System for 500kV Transformer
Authors: Feng Huo , Jianling Wu , Shangbin Liu , Yonggang Yue 
Published: June 2020

Abstract
A large number of oil flow relays and submersible pumps in the forced oil circulation mode of the main transformer have a huge workload of operation and maintenance. The main transformer of the ODAF cooling system has a large number of oil flow relays, and the submersible pump is prone to malfunction, which resulting in a large amount of maintenance work and the risk of the main transformer being forced to stop. Oil flow baffle and submersible pump running wear debris may affect the normal operation of transformer. This paper, through the field research and application of the transformation of the 500kV main transformer ODAF cooling system, carries out calculation of modification, analysis and calculation of cooling efficiency principle, etc.
Research about the influence of the parameters of the polishing pad on the removal depth of the Al6061 material
Authors: Chen Han , Ji Shijun , Zhao Ji , He Qiuwei 
Published: June 2020

Abstract
Polishing pressure, machining dwell time and tool head spindle speed are the main factors affecting the workpiece cutting depth. In order to analyze the importance of influencing factors, the orthogonal experiment is conducted. The pre-processing is carried out first, and then the formal processing is started. After the formal processing is completed, the cutting depth of each processing point is measured, and the cutting depth under the specified parameters is obtained by subtracting the cutting depth obtained from the pre-processing. Finally, the experimental data show that the average cutting depth is taken as evaluation criteria, and the most important influencing factor is dwell time, followed by polishing force, and spindle rotation speed.
Research on gait design of Hexapod Bionic Robot under damaged condition
Authors: Zhou Zequan , Xu Fenghui , Jia Zhidong , Chen Hao , Shi Qin , Xu Jiangcheng 
Published: June 2020

Abstract
Hexapod robot plays an important role in rescue and relief, battlefield rescue and other occasions. However, due to the influence of environment and other factors, the hexapod robot may be damaged to different degrees, which makes it unable to work normally. This paper studies the gait of hexapod robot under the condition of damage, analyzes the different damaged conditions of hexapod robot, establishes the hexapod robot model under different damaged conditions, studies the gait and stability of hexapod robot under the condition of single-leg damaged, and plans the stable gait suitable for the robot to continue to work. According to the simulation analysis, the four-legged and three-legged gait of the hexapod robot under the condition of single-foot damage which makes itself work normally is obtained. The research method in this paper can be applied to other multi-legged robots under different damage conditions, which has certain significance to improve the working life of these kinds of robots.
A New Research of Detection Device for Smart Wearable Equipment Step Counting Function
Authors: Li Peipei , Zhao Yi , Yang Yanfeng , Liu Yong , Hu Jianyu 
Published: June 2020

Abstract
This article analyzes the current research status of smart wearable devices, proposes a step detection method for the smart wearable device, completes the hardware design and software programming of the device, and develops a test device for step counting function of smart wearable equipment. By testing the relevant products and collecting data, the relevant test results are given. The development of this device provides professional and credible testing data and results to the vast number of consumers and the general public. It can promote the innovation and development of the smart wear industry and deep integration with other industries and technologies. It also has great significance for testing institutions and enterprises.
Vibration response analysis on the sand-wall collision
Authors: Yichen Li , Kai Feng , Zongwen Jia , Gang Liu , Kai Wang , Gang Wang 
Published: June 2020

Abstract
The real-time monitoring of solid particles in pipelines has been widely used in industry, especially during sand production in the petroleum industry. The monitoring result is determined by the vibration force response characteristics of sand-wall collision. In this paper, the process of the sand-wall collision was analyzed by Hertz contact theory, and the main vibration frequency from the sand-wall collision was calculated. The corresponding sand-wall impacting experiment was also investigated. Based on the theoretical and experimental research, the results showed that the main frequency of the sand vibration signal is inversely proportional to the diameter of the sand, and the initial velocity of the sand impact wall has little effect on the main frequency of the vibration signal. Besides, the sand-liquid film-wall experiment and simulation results showed that fluid viscosity little affect the stress transmission under low viscosity (less than 40 mPa·s), and the viscosity has the greatest effect on stress transfer under the high viscosity of 90 mPa·s. The above research lays the foundation for the detection ability of solid particles in pipe flow.
Electromechanical Coupling Modelling of High Speed EMUs with Rotor Field Oriented Control
Authors: Wang Junguo , Yao Zhaoyuan , Haseen M.F. , Zhao Yongxiang 
Published: June 2020

Abstract
According to the theory of vehicle system dynamics and rotor flux-oriented control (RFOC), an electromechanical coupling simulation model of transmission system of high-speed EMUs is established considering the effect of mechanical and electrical characteristics. Firstly, an EMUs multi-body system (MBS) model including is developed by Simpack software based on the structure and parameters of a high-speed EMUs, and a RFOC simulation model of traction transmission system is also built by the Simulink platform. Then two types of models are linked by Simpack co-simulation interface model. Consequently, the electromechanical coupling model of EMUs is developed. The computer simulation method is adopted to simulate the coupling system with RFOC. Simulation results indicate that the proposed model can effectively reveal the change of electrical performance of the high-speed EMUs, the coupling system has a good anti interference performance and robustness.
A Portable Potentiostat for Three-Electrode Electrochemical Sensor
Authors: Ning Z H , Huang J Q , Guo S X , Wang L H 
Published: June 2020

Abstract
This article reports a portable potentiostat based on a three-electrode electrochemical measurement system, which can be powered and communicated through the OTG interface of a smartphone. The system includes the design of the board-level potentiostat circuit, the generation of excitation in common forms required in electrochemical reactions, and the design of signal capture and analysis circuits. The potentiostat applies the positive and negative step-shaped excitations generated by the excitation generating circuit between the working electrode and the reference electrode stably. Through special excitation methods, the stripping current measured by the working electrode is consistent with that of a large electrochemical workstation. By simulating the classical three-electrode electrochemical solution environment impedance model, the constant potential error of the potentiostat was finally tested to be below 30mV through the detection circuit.
Finite element analysis and optimization design for automobile interior door-handle
Authors: Zhang Enguang , Wang Li 
Published: June 2020

Abstract
This paper used NX8.0 to perform parametrization design, motion simulation, finite element analysis, fatigue life analysis and optimization design on the automobile interior doorhandle. Load Transfer Method and Single Body Method were used to analyze the Maximum stress of door-handle. The mechanical properties before and after optimization were compared. Results showed that the maximum stress was reduced by 12.65%, the fatigue life is 3.62E+007 Duty Cycles, and fatigue life met design requirements. All processes were completed under the same software, which ensured the data consistency and improved design efficiency.
Design and Application of Cigarette Maker’s Online Inspection System for Cigarette Appearance
Authors: Lihong Zhang , Yuliang Li , Shuai Yang , Qiang Zhu , Lifeng Fan , Ming Li , Yajuan Zhuang , Junjie Zhang 
Published: June 2020

Abstract
In order to solve the problem that the continuous appearance inspection of the online product of the single-piece can not be carried out during the process, the online appearance inspection system of the cigarette-making unit was designed according to the running characteristics of the machine. The device is mainly composed of a camera control unit, a light source control unit, a signal processing unit and a data communication unit. The system first obtains the cigarette machine production status and single cigarette segmentation signals of continuous cigarettes through an axis encoder. The light source control unit and camera control unit work together to obtain images of a single cigarette at different stations, and perform realtime calculation and integration through the signal processing unit. After the shaft encoder, the processed signal is aligned with the cigarette, and finally the rejection is performed through the rejection valve. The ZJ17 rolling unit and cigarette products with a diameter of 5.4mm, a total length of 84mm, a cigarette length of 54mm, and a filter length of 30mm were tested. The results showed that the online appearance inspection system of the cigarette unit of the rolling unit had a detection accuracy rate of ⩾ 98%, missed rejection rate ⩽ 2%, false rejection rate ⩽ 2%. The device realizes the continuous detection of the appearance of the single product of the spliced product online, and opens up new ideas for the quality assurance of the appearance of the spliced product.
An Improved Method Using SINS/PPP Method for Land Vehicle Gravimetry
Authors: Yu R H , Wang L , Cao J L , Cai S K , Wu M P , Xu X 
Published: June 2020

Abstract
Differential GNSS has been successfully applied in the SINS/GNSS vehicle gravity measurement method over the past few decades. However, GNSS error source has the spatio-temporal correlation in the differential mode. The navigation resource utilization efficiency is degraded due to the limitation of the baseline distance and the satellite common view. Using only one satellite receiver with high precision satellite orbit parameters and clock parameters, establishing navigation error models and parameter estimation methods, and obtaining high-precision receiver dynamic positioning, Precise Point Positioning (PPP) is a promising non-differential mode GNSS technique. The advantages of PPP are that it is simple to operate, low in cost, and not limited by the requirements for establishing a base station. This paper presents an SINS/PPP method for land vehicle gravimetry. Based on the strapdown gravimeter SGA-WZ02 developed by the National University of Defense Technology (NUDT), a land vehicle gravimetry test was carried out on a road about 36 kilometres long. The test consists of four measuring lines back and forth in the north-south direction with an average speed of 40km/h. Using this method, the internal accuracy of four repeated lines is 0.52mGal/0.9km. Compared with the results obtained by traditional SINS/GNSS method, the internal accuracy is 0.51mGal/0.9km, which shows that the accuracy calculated by SINS/PPP method is comparable to the results calculated by SINS/DGNSS method. Practical gravimetry results indicate that the proposed SINS/PPP method in this paper can meet the requirements of vehicle gravimetry under ideal GNSS observation conditions, and the feasibility of PPP technology for vehicle gravimetry is verified. Finally, some discussions and suggestions about the applicability of the method and its further improvement are put forward.
Speed sensorless of induction motor with adaptive full order state observer
Authors: Yu Xiangqian , Zhang Chi , Su Tao 
Published: June 2020

Abstract
Speed sensorless vector control of induction motor not only maintains the excellent performance of vector control, but also overcome the disadvantage of speed sensorless. It can reduce the cost and improve the reliability. So speed sensorless control have been widely researched. The paper implement speed sensorless control by the adaptive full order state observer and give debug process. Experiment results shows that this approach have excellent performance.
Investigation of Three-Level ANPC IGCT Converter for Industrial Medium-Voltage Drives
Authors: Zhang Jingxuan 
Published: June 2020

Abstract
High-power three-level neutral-point-clamped (NPC) integrated gate commutated thyristor (IGCT) voltage-source converters have been widely used in industry applications. The novel three-level active neutral-point-clamped (ANPC) IGCT voltage-source converters can provide three additional switch states compared to the the NPC counterparts. Thus, the ANPC converter can increase the rated power compared to NPC. In this paper, the switching states of the three-level ANPC IGCT voltage-source converters are illustrated. The commutations and power loss distribution of the IGCT devices are investigated. The strategy is implemented on a high power three-level ANPC voltage-source converter equipped with 4.5kV/4kA IGCT devices. The experimental results prove that the three-level ANPC voltage-source converter has higher power density compared to the conventional NPC counterparts.
Simulation Analysis of Static Characteristics of Electromagnetic Mechanism of Magnetic Holding Relay Based on ANSYS
Authors: Fan Xingming , Zheng Yuxin , Zhang Xin 
Published: June 2020

Abstract
As an important part of the magnetic latching relay, the design of its parameters will directly affect the static characteristics of the entire system. This article first explains the working principle of the magnetic latching relay and the electromagnetic field analysis theory. Based on this, a simplified model of the electromagnetic mechanism is established. The ANSYS finite element analysis software is used to simulate and analyze the electromagnetic mechanism. The electromagnetic generated by the electromagnetic mechanism under different parameters is obtained. The magnitude of the force and its magnetic induction intensity distribution cloud map provide a useful reference for the performance optimization of the magnetic holding relay and subsequent related research.
Research on electromagnetic interference protection of vacuum tank temperature acquisition system
Authors: Shichao Guo , Dandan Guo , Qiongyu Zhang , Nankai Wu , Jiaxin Deng 
Published: June 2020

Abstract
Solving the electromagnetic interference problem of the vacuum tank temperature acquisition system has an important role in improving its field reliability. The interference coupling path is found by simulating the source of electromagnetic interference in the environment, and the component characteristics are analyzed. The problem of electromagnetic interference by improving its own anti-interference ability was solved, and a solution for verification was proposed again.
Research on Electromagnetic Environment Situation Display of Digital Map Radar based on 3D GIS
Authors: Shichao Guo , Dandan Guo , Qiongyu Zhang , Nankai Wu , Jiaxin Deng 
Published: June 2020

Abstract
In order to meet the requirements of electronic countermeasure application, the visualization analysis method of information electromagnetic environment was studied. The elements of data operation parameters of electromagnetic environment were put forward, and a comprehensive display system of electromagnetic environment information was developed. Then the dynamic display of radar detection range in complex electromagnetic environment based on GIS was completed.