bluuebunny/crossref_metadata_2025_split huggingface dataset:
Controller design for a nozzle-flapper type servo valve with electric position sensor
Authors: Istanto Iwan , Lee Ill-Yeong , Huh Jun-Young , Lee Hyun-Cheol 
Published: September 2019

Abstract
The control performance of hydraulic systems is basically influenced by the performance of the electro-hydraulic servo valve incorporated in a hydraulic control system. In this study, the authors propose a control design to improve the control performance of a servo valve with a non-contact eddy current type position sensor. A mathematical model for the valve is obtained through an experimental identification process. A PI-D control together with a feedforward (FF) control is applied to the valve. To further improve the dynamic response of the servo valve, an input shaping filter (ISF) is incorporated into the valve control system. Finally, the effectiveness of the proposed control system is verified experimentally.
Multi-Objective collaborative planning for distribution networks considering electric vehicle charging stations and distributed generation
Authors: Zheng Yunfei , Sang Zixia , Wang Yingxiang , Li Xiang , Wang Rian , Kong Shunfei , Hu Zhijian 
Published: September 2019

Abstract
The large investment of electric vehicles and distributed generation has affected the stable operation of distribution network. At the same time, the construction of charging station of electric vehicles not only causes the burden of electric power network, but also the burden of transportation network. How to ensure the stability and economics of distribution network has become an urgent problem. Based on this background, this paper proposes a multi-objective collaborative planning method for distribution network, which considers the charging station of electric vehicle and the distributed generation. In order to find the optimal planning scheme, we use an improved NSGA-II algorithm. Finally, the simulation analysis of the case of IEEE 33-bus shows that the proposed planning method not only ensures the stability and economics of distribution network, but also fully saves the average waiting time of charging users of electric vehicles and improves the traffic satisfaction.
Design of rolling ball control system based on OpenMV
Authors: Zhou Linjie , Xu Enyi , Chen Donghong , Xu Chenghao , Chen Xiai , Xu Suan , Wang Ling 
Published: September 2019

Abstract
The ball-on-plate system, a non-linear control system with a 2-degree of freedom, is crucial for understanding the control system applications. As increase of the non-linearity with the degree of freedoms, the system can be used to test and identify different aspects of controls. This paper describes the design and implementation of a ball-on-plate system based on OpenMV that includes machine vision modules. Camera OV7725 with chip model of STM32F765 in OpenMV detects and calculates ball position on the plate in real time, and then the OpenMV sends the position data of the ball to the main Micro Controller Unit through a serial port. The MCU calculates the data with a cascade PID controller, and outputs the PWM wave to control the rotation angle of the steering engine. The steering engine drives two vertical parallelogram linkage mechanisms to manipulate the motion of the plate. Thus, the system can exactly control the motion state and position of the ball on the plate in real time.
The design and implementation of vehicle-mounted satellite communication on the move based on MEMS gyro
Authors: Xi Xiaopeng , Su Min 
Published: September 2019

Abstract
As an important satellite communication technology, mobile communication has broad application prospects in the field of military and civilian applications. Low cost and high reliability have become one of the goals and difficulties in engineering design. In order to overcome the shortage of course information provided by inertial navigation or electronic compass, a beacon space search algorithm without course information is designed. A low cost gyro stabilization platform based on ARM and MEMS gyroscope is designed for the high mobility and complex working conditions of vehicles. The servo motor and photoelectric encoder are used to construct the multi-closed-loop control system to improve its fast response ability, and the pitch compensation and beacon space search algorithm are used to improve the precision of the system for star and tracking. It has good engineering application and popularization value.
Variable step size tracking algorithm for the VICTS antenna
Authors: Zhang Zhiyong , Lei Xue , Xu Zhijian , Li Tianpeng , Gao Jun 
Published: September 2019

Abstract
A variable step size tracking algorithm for the Variably Inclined Continuous Transverse Stub (VICTS) Antenna for Ku-band fixed-satellite service is proposed. The traditional step tracking algorithm is improved by using and the simulation analysis of the VICTS antenna to get the apposite step size. And the feasibility and superiority of the algorithm are verified by the failure rate of locking the satellite. The proposed algorithm provides a feasible method for the VICTS antenna servo system to achieve satellite communication on the move (SOTM).
Design of high precision AC current power supply based on STM32F407
Authors: Chen Kailun , Luo Zhaotong , Wang Zikun , Chen Qiong 
Published: September 2019

Abstract
The design and implementation of high precision and stable AC current supply plays an important role in the use of various electronic devices. In order to achieve the design requirements of high output accuracy, good stability and low uncertainty, STM32F407 Microcontroller Unit is used as the control core in hardware, high-precision current is generated through digital-analog conversion circuit, and closed-loop adjustment control system is realized with I/V conversion and sampling circuit. Based on the fast Fourier transform theory, the device adopts the technology of surface-source integration and uses liquid crystal display configuration screen as the human-computer interaction medium. The experimental results show that its accuracy can reach 5/10,000, its stability can reach 5/100,000, and its uncertainty can reach 1/1,000. It is suitable for various high-precision occasions.
The evaluation of performance cost for network based moving target defense
Authors: Xiong Xinli , Li Kechang , Zhao Guangsheng 
Published: September 2019

Abstract
Network based moving target defense prevents attackers from reliably contacting a system by re-configuring network factors. Although limited researching has demonstrated it to be practical and feasible, little studies have been conducted to evaluate the performance cost appended to the original system. Without quantitative results, it is challenging to implement moving target techniques to typical information system broadly. This paper introduces a Queueing Petri Net model that can provide insight into the performance of network re-configurations. This model quantifies the system throughput, queue utilization and response time of requests regarding configurations of the information system, type of strategies for mutation and the frequency of networking transformation. Through logical deductions and simulations using Queueing Petri net Modelling Environment, results show that the network shifting method is an affordable defense technology compared to the performance loss in the processing of servers. Moreover, event-based strategies can get the trade-off between security and performance. These results guide the research deep into developing a more optimized method in moving target defense.
A broadband low noise amplifier in 70nm GaAs MHEMT process
Authors: Guan Jin , Gong Min , Gao Bo , Lu Yuxi 
Published: September 2019

Abstract
In this paper, a broadband low noise amplifier (LNA) is presented with 70nm GaAs metamorphic high electron mobility transistor (MHEMT) process. The feedback and input/output impedance match techniques for broadband amplifier are presented. The stability, noise figure, gain flatness, and S-parameter performance of this LNA are analyzed and discussed. The small signal gain of the LNA is 20dB±0.2dB and noise figure of 0.86dB~1.35dB among operating from almost DC to 15GHz. This LNA exhibits reflection below -10dB, power dissipation of 70mW and chip area of 1.0mm*0.6mm. This LNA finds its application in many wideband systems.
Multiple target recognition of UAV based on image processing
Authors: Deng Weidong , Tang Daquan , Lu Keke , Tang Guanzheng 
Published: September 2019

Abstract
Unmanned aerial vehicle (UAV) has been widely used in military and civil fields due to its unique advantages. Aiming at the principle of UAV in reconnaissance field and target recognition field, a method of UAV multi-target recognition based on image processing is proposed, and the validity of the method is verified by building an UAV platform and field experiments. At the same time, the display interface of image processing results is developed, which can get the UAV recognition results in real time. Finally, the experimental results are analyzed, and the factors affecting the accuracy of UAV target recognition are elaborated.
The analysis of type-2 fuzzy controller for ITER PF ac/dc converter control system
Authors: Ul Hassan Mahmood , Humayun Muhammad , Huang Liangsheng , Waheed Bushra , Fu Peng , Song Zhiquan 
Published: September 2019

Abstract
This novel type 2 fuzzy controller (T2FC) have more attractive research to developed the membership functions (MF) and rule uncertainties in the complex tokamak International Thermonuclear Experimental Reactor (ITER) Poloidal Field (PF) system. The uncertainties always happened to design the MF in real time applications. This paper proposes the T2FC design strategy in single and parallel operation. During the operations it is inflexible to handle the extremely uncertain and cannot determine the membership grades by conventional type 1 fuzzy controller (T1FC). To address the uncertainties issues the T2FC is the robust technique to accommodate the rule and membership uncertainties.
Research on MCGS biochar measurement and control system
Authors: Zhu Kai , Wang Zixin , Zhang Zhixia 
Published: September 2019

Abstract
Biochar is a kind of carbon-rich, highly aromatic and highly stable solid product produced by high temperature thermal cracking of biomass feedstock under complete anaerobic or partial anoxic conditions. It is pyrolyzed at 300~500 °C. Biochar can be prepared from rice straw. Based on the actual needs, this paper proposes a biochar carbonization temperature control technology based on the Internet of Things technology for straw carbonization. The SCADA data monitoring and control system consists of a Modbus-based, Web Access web database and a remote data transmission and local control network. With ADAM-4060 and intermediate relay as the control core, thermocouple, ADAM-4018 data acquisition module, MCGS industrial grade programmable human-machine interface and no Web Access webpage database, remote monitoring of carbonization furnace temperature parameters, and according to the alarm status and warning line alert the manager to control the operation of the blower. The purpose of this paper is to find the optimum carbonization temperature for rice and to control the internal temperature of the carbonization furnace near the optimum temperature.
Exploring possibility to improve frequency properties of 1200V and 1700V IGBT and FRD with partially diffused proton beam
Authors: Surma Alexey Maratovich , Verevkin Vladimir Viktorovich , Volobuev Kirill Andrianovich 
Published: September 2019

Abstract
Authors research a technology to improve frequency properties of IGBT and FRD using a partially diffused high-energy proton beam, and demonstrate a possibility to use this technology to manufacture fast and ultrafast IGBT and FRD for frequencies within 20-50 kHz.
Study on straightness measurement technology of slender rod based on time-domain three-point method
Authors: Chen Xinchun , Bi Mengxue , Xue Chunyang 
Published: September 2019

Abstract
Straightness is the key geometric accuracy index of the slender rod of key parts of large machinery, which directly affects the manufacturing and installation accuracy, working efficiency and service life of mechanical products. In order to improve the manufacturing precision of the slender rod and overcome the limitations of the existing methods, a method for measuring the straightness of the slender rod based on the time-domain three-point method is proposed. According to the structural characteristics of the slender rod, the measurement principle and the overall scheme of the measurement system are given, and the mathematical model of the straightness measurement is established. Taking the core components of a construction machine as an example, the measurement and comparison of the designed measuring device and the laser tracker are used to prove that the measurement error of the designed measuring device is less than 0.005 mm. The measurement system analysis results show that the R&R of the designed measuring device has less than 10% of the research variation, indicating that its repeatability and reproducibility are good, which further proves that it can be applied to the actual production site.
Research on process task scheduling method for complex equipment manufacturing based on genetic algorithm
Authors: Wang Yujie , Huang Song , Cao Xiang , Qin Xiaopin 
Published: September 2019

Abstract
The research and application of effective scheduling methods play an important role in manufacturing enterprises to improve production efficiency and reduce production costs. Based on the characteristics of the capability maturity of processors, this paper establishes a process task scheduling strategy that is conducive to guarantee delivery time and reduce labor costs according to the actual production environment of complex equipment manufacturing enterprises. A scheduling two-level planning model with delay time and labor cost as indicators is constructed, and the model is solved by genetic algorithm. The planning scheduling method based on order priority and technician effective working time constraints is studied. Finally, an example is given to verify the feasibility and effectiveness of the proposed method.
Numerical simulation of NC spinning manufacturing on tantalum tungsten alloy cylinder part
Authors: Li Xueguang , Zhang Zhifeng , Liang Wei , Miao Liqin 
Published: September 2019

Abstract
The tantalum tungsten alloy has excellent mechanical properties which is used extensively in many fields, in this paper, the spinning manufacturing simulation model was built for the tantalum tungsten alloy cylinder part based on finite element method, the spinning process parameters were designed according to the actual working conditions, the stress, strain and the materials flowing behavior during the spinning process were analyzed, the spinning manufacturing results was obtained. Then the influence of spinning wheel working angle, spinning wheel fillet radius, spinning feed rate and thinning rate on equivalent strain was discussed.
Study on process and manufacturability of metal-bonded diamond grinding wheel fabricated by selective laser melting (SLM)
Authors: Tian Chenchen , Li Xuekun , Li Hanyang , Guo Guoqiang , Wang Liping , Rong Yiming 
Published: September 2019

Abstract
Selective laser melting (SLM) technology is used to fabricate metal-bonded grinding wheel based on mixed powders consisted of metal powders and diamond abrasives. Taguchi method is adopted to obtain the optimal SLM process parameters for grinding wheel considering laser power, scanning speed and layer thickness. Specimens are fabricated with different SLM process parameters for compression and three-point bending tests. Materials characterization and manufacturing limit test are performed on the specimens fabricated by the optimal SLM process. Results indicate that laser power of 250W, scanning speed of 2.5m/s and layer thickness of 20μm are determined as the optimal SLM process in terms of comprehensive mechanical property and formed surface quality. Moreover, diamond abrasives are firmly embedded into aluminium binder with good bonding condition for SLM-fabricated composite. Furthermore, manufacturability of SLM-fabricated composite is evaluated by manufacturing limits of several common structures. In summary, work in this study fully proves the feasibility of SLM-fabricated metal-bonded grinding wheel and provides a solid basis for the further investigation on the novel grinding wheel with customized porous structures.
Analysis of bending vibration characteristics of rotating composite boring bar
Authors: Ren Yongsheng , Zhao Qi , Liu Yinlei , Ma Jingmin 
Published: September 2019

Abstract
In this study, the dynamic characteristics of composite boring bar are theoretically investigated. The structural dynamic model of composite boring bar having clamped-free supports is developed by employing Bernoulli-Euler beam theory and considering dissipative characteristics of viscoelastic composite material. The Galerkin method is used to solve the equations of bending vibration. The complex characteristic equation for bending vibration is derived. Numerical examples present the variation of the natural frequency, damping and dynamic stiffness with ply angle, and the variation of the natural frequency and damping with rotating speed are also obtained. The study results show that ply angle, stacking sequences and ratio of length over outer radius have significant influence on the dynamic characteristics of composite boring bar. Conclusively, lamination design can significantly improve dynamic performance and enhance chatter stability in machining.
Precision assembly method based on coaxial alignment and force control
Authors: Guo Pengyue , Zhang Zhijing , Liu Yan , Sun Weichen , Li Zhe 
Published: September 2019

AbstractTo ensure the assembly performance of precision assembly system, a high-precision assembly system for gear-piece and gear-shaft is developed in this paper, which consists of a computer, two manipulators, a coaxial alignment module(CAM), a selective compliance assembly robot arm (SCARA), an adjusting platform and a force sensor. The CAM is used to calculate the position and angular deviation of gear-piece and gear-shaft. The force sensor is equipped to detect the contact force. In the stage of adjusting alignment, position-based visual servoing (PBVS) is adopted to ensure high precision alignment of parts. In the insertion stage, an impedance control method based on position is proposed to ensure the contact force. Experiments are carried out to demonstrate the validation of the proposed system and methods. Automated assembly of parts with a 5μm gap is achieved.
Sustainable Development approaches in Egypt
Authors: Abdelrahman Hussein Ahmed Adel , Pollock Eric 
Published: September 2019

Abstract
In conjunction with the current Egyptian sustainable and economic reform plan to enrich the country resources and face future challenges, the megaprojects have been pursued to improve the infrastructure and encourage investment. Starting with renewable energy planets and passing by 14 new sustainable cities all over Egypt to absorb the future expected population and improve the living standards of the Egyptian citizens. One of those cities is the New Administrative Capital which is being built as a smart city on an uninhabited strategic area between the Suez Canal and the Nile River and it will become the new administrative and financial capital of Egypt, housing the main government departments and ministries, as well as foreign embassies. This paper attempts to review the United Nations Sustainable Development Goals in the Egyptian megaprojects with a special focus for the Egyptian New Administrative Capital city.
Towards more sustainable patterns of urban development
Authors: Marino F P R , Lembo F , Fanuele V 
Published: September 2019

Abstract
DETR, 1998, wrote in Planning for Sustainable Development. Towards Better Practice: “New settlements will enjoy a high quality of urban and landscape design. As well as integrated open space, there should be habitat areas, and environmental gains such as energy efficiency measures introduced in layouts and individual buildings”; but this claim is remained largely dissatisfied. There is a great interest (and large investments in research) for the smart city, which seeks to optimize the existing cities, while people go on to design urban developments with building typologies set ninety years ago by Modern Movement or little more. Urban Planning compares existing cities’ models and asseverates that densification has positive role for sustainability, but do not turns enough to account passive typologies for heating and cooling, which can turn down near to zero power-consumption, and at the same time can raise urban environment quality. Famous settlements too, as Malmö or Vauban in Freiburg, has been built with building typologies conventional, after all; German passive Haus have generally two, three or four building fronts and in reality, are simply hyper-insulated traditional buildings, furnished with mechanical controlled ventilation. For an urban extension of Potenza, we have used for the urban planning the sustainability assessment categories of ITACA’s Protocol, derivative from GBTool of GBC, people normally use to assess ex-post sustainability of projects and of realized buildings. The result is a settlement in which pedestrian, cycle and public transport’s network is fully integrated with adjacent urban areas; effective landscaping connects public and private green and kitchen-gardens/orchards are everywhere; buildings are made with new semi-underground typologies, nZEB and made with local, re-cyclable materials; rain water is collected, in-loco fito-depurated and reused; in-loco renewable energies (sun, earth, wind) satisfies remaining necessities.
Residential movements in connection to renovation of rented multi-residential housing: A pilot study
Authors: Femenías P , Jonsdotter L , Forsemalm J , Punzi E , Bogdanova E , Thodelius C , Granath K 
Published: September 2019

AbstractResidential movement and displacement as an effect of renovation has earned attention and also affected renovation practices in Sweden. While statistical studies have linked deep renovation to residential movement and displacement, there are no recent studies that investigate why people move or remain in housing areas that are renovated, and if and how the relocation is determined by the renovation. A pilot study was initiated as a means to develop a methodology to study residential movement in connection to renovation. In this paper, methodological considerations are discussed based on 31 interviews (face-to-face and telephone) with movers related to 34 municipally owned rented housing areas about to undergo renovation, as well results from a questionnaire sent to two finalised renovation projects (N=113). So far, the pilot study indicate that few relocations can be linked to the up-coming or finalised renovation in the studies cases. The questionnaire that was sent out to remaining tenants had a low response rate of 29%, and the efficiency of using questionnaires is discussed.