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Design, development, and performance of an ammonia self-managed vaporization propulsion system for micro-nano satellites Regular Article
Shu-jian Sun, Tao Meng, Zhong-he Jin,sunshujian@zju.edu.cn,mengtao@zju.edu.cn
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 11, Pages 1516-1529 doi: 10.1631/FITEE.1800068
Keywords： 自主汽化管理；液氨；毫牛量级推进技术；微推力；高精度轨道控制；微纳卫星
The high-performance micro sensor and digital system for monitoring of the oil and gas field
Zhao Yulong,Niu Zhe,Zhou Guanwu,Zhao Libo,Jiang Zhuangde
Strategic Study of CAE 2013, Volume 15, Issue 1, Pages 99-105
In order to suit for the special requirements of the oil and gas fields, in this paper, the design and fabrication of a high-temperature and high-pressure sensor chip was described. And the related high-performance digital transmitter system was produced. The textual sensor chip was designed to accomplish the thermostability in the high temperature environment which the traditional sensor can't suit for. The linearity and accuracy of the system were promoted by the digital compensation technology. And the associated equipment were integrated into the system. Moreover, in order to meet the requirements of the oil and gas fields inspect managements, the wireless sensor network were designed, which can guarantee the high-efficiency operation and control of the industrial production. Through the experiments, the high-accuracy and reliable of the high-performance micro sensor and digital transmitter system were credible. The accuracy of it is above 0.2 % FS. The system has reached the world class and was especially significant for the domestic petrochemical industry.
Keywords： high-temperature and high-pressure sensor chip high-performance digital transmitter system digital compensation technology wireless sensor network high accuracy
Expressions for Differential and Apparent Coefficients of Static Friction
Wang Weiyuan
Strategic Study of CAE 2001, Volume 3, Issue 8, Pages 29-32
Recently, scientists and engineers are interested in coefficients of static friction on micro and nano scale. On macro scale, the friction force is proportional to load, the apparent coefficients of static friction are always constant and not related with the load and the contact area between the load and the substrate, which have been described as Amontons' laws. However, a lot of experiments carried out with scanning microscope, atomic force microscope and friction force microscope on micro or nano scale showed that Amontons' laws can not used successfully. On micro or nano scale, there is no general expression published in literatures to describe the relationship between the coefficients of static friction and the load. Also the published data do not compare with and discuss each other. In this paper, from the definition of differential coefficients of static friction, the expressions for differential and apparent coefficients of static friction, 〓 and 〓 for several models are deduced. Only 〓 can be measured in experiments, which can be the coefficients on micro or macro scale depending on the load on the substract, but 〓 can not be measured because the differential variables are too small to measure. In Amontons' model, 〓 equals to 〓 and both are constant. In single asperity model with load on micro or nano scale, 〓 and 〓 are not constant but propotional to P-1. In the model based on absoption layers as third bodies between two contact bodies, 〓 is a constant, 〓 is not a constant but proportional to P-1. 〓 is a constant only in high normal pressure. In the model based on constant P, 〓 and 〓 are related with F and A . Finally, the experimental data published in literatures have been discussed based on the novelly deduced expressions.
Keywords： differential coefficients of static friction coefficients of static friction on micro or nano scale apparent coefficients of static friction coefficients of static friction on macro scale
Measurement and Control Technology for the Array of Low Cost PCR Microreactors
Li Xianming ,Zhang Yulin ,Li Jiantian
Strategic Study of CAE 2007, Volume 9, Issue 7, Pages 76-81
In this paper a new style of polymerase chain reaction(PCR)equipment is studied and the goal of the study is to reduce the cost of micro-reactor PCR chips, improve its reliability and make a hundred of chips working together in the same time. There are no micro-sensors and micro-heaters in the chips. It is the concrete way to reduce the cost of PCR chips and improve the reliability of the chips. So the focus of the study transfers from the design, simulation and processing to the measurement and control of the chips. The measurement and control scheme for the low-cost PCR chips is designed. By selecting several chips as model chips and combining unitized macroscopic control and distributed microcosmic control, the system is able to do temperature cycling control to the chip array which is made of many chips at the same time. The loading effect applied to the temperature field by the temperature sensor and the compensation method for the loading effect are studied. The main idea of this method is to compare the measurement result gained from the temperature field in which two sensors are set with the measurement result gained from the same temperature field but in which one sensor is set, and the difference is the loading effect that one sensor applies to the temperature field. The temperature measurement errors to the liquid internal the model chips are analyzed and synthesized in considerable detail and an intelligent prediction compensation method for dynamic measurement errors is obtained. The uncertainty of indirect to the temperature of PCR liquid in low-cost PCR chips is also assessed. Cascade control strategy is applied to further improving the performance of control system. Its performance in temperature cycling meets the requirements of PCR.
Keywords： microreactors measurement control polymerase chain reaction
Editorial for the Special Issue on Micro and Nano Manipulation and Characterization
Yu Sun, Sergej Fatikow, Xinyu Liu
Engineering 2023, Volume 24, Issue 5, Pages 1-2 doi: 10.1016/j.eng.2023.04.006
Micro － blind mesh thermal control study and simulation of nano-satellite
Yang Juan,Li Yunze,Wang Jun
Strategic Study of CAE 2008, Volume 10, Issue 7, Pages 169-172
The limits of nano-satellite's volume and quality may cause a high density in the cabin. Micro-blind mesh can resolve this problem properly. The intelligent control strategy of micro-blind mesh' s drive is the key technology. A dynamic characteristics model of the spherical nano-satellite was established.Based on the model,a fuzzy PI shunt-wound controller was designed. The simulation was carried on, in conditions of increasing and decreasing the equipments' heat dissipation. Results show that this new controller is superior to the fuzzy controller and PID controller in that the former works well with good control effect and high dynamic performance.
Keywords： nano-satellite micro-blind mesh fuzzy PI controller simulation
Energy management for multi-microgrid system based on model predictive control None
Ke-yong HU, Wen-juan LI, Li-dong WANG, Shi-hua CAO, Fang-ming ZHU, Zhou-xiang SHOU
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 11, Pages 1340-1351 doi: 10.1631/FITEE.1601826
To reduce the computation complexity of the optimization algorithm used in energy management of a multi-microgrid system, an energy optimization management method based on model predictive control is presented. The idea of decomposition and coordination is adopted to achieve the balance between power supply and user demand, and the power supply cost is minimized by coordinating surplus energy in the multi-microgrid system. The energy management model and energy optimization problem are established according to the power flow characteristics of microgrids. A dual decomposition approach is imposed to decompose the optimization problem into two parts, and a distributed predictive control algorithm based on global optimization is introduced to achieve the optimal solution by iteration and coordination. The proposed method has been verified by simulation, and simulation results show that the proposed method provides the demanded energy to consumers in real time, and improves renewable energy efficiency. In addition, the proposed algorithm has been compared with the particle swarm optimization (PSO) algorithm. The results show that compared with PSO, the proposed method has better performance, faster convergence, and significantly higher efficiency.
Keywords： Microgrids Energy management Predictive control Renewable energy Controllable energy
Luan Xiuchun,Han Weishi,Wang Junling,Yang Aiguang
Strategic Study of CAE 2010, Volume 12, Issue 3, Pages 45-50
This paper sets forth the realization of automatic positioning of crane in high precise in the storehouse for nuclear waste, including the hardware configuration and software configuration of the control system, the control logic, the program structure and the the function curve of frequency control, and the results of field test are given.
Keywords： nuclear waste crane automatic control positioning
Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan
Strategic Study of CAE 2013, Volume 15, Issue 1, Pages 28-33
Based on how to improve the inherent thermal performance of high speed high precision machine tools, theories and methods about thermal characteristic analysis, thermal structure optimization and cooling technology were introduced systematically in this paper. In order to provide reference for machine tools researchers and designers, the latest progress and technology on thermal design of machine tools were reviewed and research emphasis and directions were also discussed.
Keywords： high speed high precision machine tool thermal characteristic analysis thermal structure optimization cooling technology
Wei Shuman,Zhang Weiming and Li Chenzhi
Strategic Study of CAE 2013, Volume 15, Issue 9, Pages 87-90
Based on the layout characteristics of the first-stage and second-stage metal structure embedded parts, and combined with the site construction environment, this article analyzes the high precision installation method in detail. At the same time, various construction plans which are suitable for Three Gorges Project ship lift are put forward. These construction plans which have been successfully used in Three Gorges Project have solved many technological problems, such as the deformation control of the embedded parts, fast and accurate positioning, high precision measurement and so on. Meanwhile, these technologies provide a reference for the constructions of similiar projects.
Keywords： ship lift metal structure embedded parts high precision installation technology Three Gorges Project
High Precision Adaptive Predictive Control for Cruise Missile
Sun Mingwei,Chen Zengqiang,Yuan Zhuzhi,Ren Qiang,Yang Ming
Strategic Study of CAE 2005, Volume 7, Issue 10, Pages 23-27
Cruise missile achieves good flight performance by means of stabilization and regulation of its attitudes. Based on analysis of the perturbation model of missile*s dynamic characteristics, series control structures are constructed for attitude control loop, and their discrete models are served as controlled plant for recursive least square (RLS) based adaptive predictive control, thus the mass center control with slow response transforms into trajectory angle control with fast response and high precision. On the basis of missile’s characteristics, generalized predictive control (GPC) is used in inner attitude loop, and an integral form of predictive control is adopted in outter trajectory loop. Effective transformation from mass center command to trajectory reference has achieved to realize high precision tracking. This method realizes the integration of attitude reference signal with guidance command, and that of attitude control with mass center control. It can reduce precision requirements on aerodynamic data and the control parameters can be easily selected. The numerical simulations demonstrate its effectiveness. Finally, some further academic directions are presented.
Keywords： cruise missile adaptive control model based predictive control robustness
Microseismic monitoring technology
Tang Chunhua,Gu Guangqing
Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 95-99
Microseismic (MS) monitoring is a hot topic in the applied geophysics recently. The MS mechanism and histories are introduced firstly in this article, and then the instruction of the MS equipment such as acquisition strategies, optimal sensors, array design, digital-signal processing, event location, velocity calibration, and monitoring deployment, is discussed. MS is a great technology with a long future, and we need to foster the understanding and acceptance of this technology.
Keywords： microseismic monitoring hydraulic fracturing oil and natural gas SNR (signal to noise ratio) event location
Prospects of Microsystems Research and Development
Zhong Xianxin
Strategic Study of CAE 2000, Volume 2, Issue 1, Pages 81-84
The microsystems research and development extends into various fields including the micro electronic, micro machine, micro-optics, chemistry, biotechnology and materials, making it a multidisciplinary technology integrating various technologies and knowledges. When considering potential uses in future, microsystems technologies are still at the elementary stage. Research today is mainly centered on fundamental technologies common to various microsystems.
May be the focus of the microsystems research and development as followings： science and technology at the microdomain, new signal sensing, transmission and processing technique, nanometer measurement and operation ,new microsystem materials, microfabrication technique.
Keywords： microsystems microdomain sensing and processing nanometer measurement new materi-als microfabrication
Micro-alloyed Steels 一 Review and Prospect
Wang Yikang
Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 77-82
In recent years, the GNP (General Gross National Production) of the major countries in the world shows apparent relation with their consumption of steel and the steel is reconfirmed as the backbone of the engineering materials. This is due to the fact that the steel making industry has been reformed perfectly by the high technique — Advanced Process Control System and brought out new steels with superior property as “high tech” steels. Micro-alloyed steel is one of the major high tech steels with largest market demand. Micro-alloyed steels are produced by the Advanced Metallurgical Manufacturing Process with addition of strong carbide and nitride alloying elements, i. e. , Nb, Ti, and V to refine their grain size in re-heating and to harden and toughen their matrix after rolling. There were developed the micro-alloyed steel of HW60R for the manufacture of large dumping trucks in open-mining, the line pipe steels of X52 ～ X65 for the construction of high pressure pipeline, and the micro-alloyed weathersteel for transportation container manufacture with great economic successes in China. In view of the micro-alloyed steels being environment conscious materials and the further development of high tough line-pipe steels, high strength ship steels and high tough SUF steel plate, the micro-alloyed steels are prospective in China in the 21 century.
Keywords： micro-alloy steel controlled rolling line-pipe steel weathering steel SUF steel environment conscious material
Application of microseismic monitoring technology in Daqing Oilfield A block well net design
Ma Jisheng
Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 74-76
The artificial fracture position and the well row direction influence the exploitation effect of low permeability reservoir. In the process of creating artificial fractures, we apply microseismic to monitor their direction, location, orientation, length and height, and determine the well alignment direction combined with the stress orientation, all of which establish well foundation for improving the development effect of A block.
Keywords： microseismic monitoring artificial fracture well pattern design
Title Author Date Type Operation
Design, development, and performance of an ammonia self-managed vaporization propulsion system for micro-nano satellites
Shu-jian Sun, Tao Meng, Zhong-he Jin,sunshujian@zju.edu.cn,mengtao@zju.edu.cn
Journal Article
The high-performance micro sensor and digital system for monitoring of the oil and gas field
Zhao Yulong,Niu Zhe,Zhou Guanwu,Zhao Libo,Jiang Zhuangde
Journal Article
Expressions for Differential and Apparent Coefficients of Static Friction
Wang Weiyuan
Journal Article
Measurement and Control Technology for the Array of Low Cost PCR Microreactors
Li Xianming ,Zhang Yulin ,Li Jiantian
Journal Article
Editorial for the Special Issue on Micro and Nano Manipulation and Characterization
Yu Sun, Sergej Fatikow, Xinyu Liu
Journal Article
Micro － blind mesh thermal control study and simulation of nano-satellite
Yang Juan,Li Yunze,Wang Jun
Journal Article
Energy management for multi-microgrid system based on model predictive control
Ke-yong HU, Wen-juan LI, Li-dong WANG, Shi-hua CAO, Fang-ming ZHU, Zhou-xiang SHOU
Journal Article
The realization of automatic positioning of crane in high precise in the storehouse for nuclear waste
Luan Xiuchun,Han Weishi,Wang Junling,Yang Aiguang
Journal Article
Thermal characteristic analysis and thermal design technology for high speed high precision machine tools
Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan
Journal Article
High precision installation technology of metal structure embedded parts of Three Gorges Project ship lift
Wei Shuman,Zhang Weiming and Li Chenzhi
Journal Article
High Precision Adaptive Predictive Control for Cruise Missile
Sun Mingwei,Chen Zengqiang,Yuan Zhuzhi,Ren Qiang,Yang Ming
Journal Article
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