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| 1 | Effective control allocation using hierarchical multi-objective optimization for multi-phase flight显示文摘For different flight phases in an overall flight mission,different control and allocation preferences should be pursued considering lift,drag or maneuverability characteristics.The multi-objective flight control allocation problem for a multi-phase flight mission is studied.For an overall flight mission,different flight phases namely climbing,cruise,maneuver and gliding phases are defined.Firstly,a multi-objective control allocation problem considering drag,lift or control energy preference is constructed.Secondly,considering different control preferences at different flight phases,the analytic hierarchical process method is used to construct a comprehensive performance index from different objectives such as lift or drag preferences.The active set based dynamic programming optimization method is used to solve the real-time optimization problem.For the validation,the Innovative Control Effector(ICE)tailless aircraft nonlinear model and the angular acceleration measurements based adaptive Incremental Backstepping(IBKS)are used to construct the validation platform.Finally,an overall flight mission is simulated to demonstrate the efficiency of the proposed multi-phase and multi-objective flight control allocation method.The results show that the comprehensive performance index for different phases,which are determined from the Analytic Hierarchy Process(AHP)method,can suitably satisfy the preference requirements for different flight phases. | Liguo SUN Qing ZHOU Baoxu JIA Wenqian TAN Hangxu LI | 2020 | Chinese Journal of Aeronautics2020，33，7： | 4 |
| 2 | FPGA-based 10G/40G Ethernet Firmware for Pixel Detector in SHINE显示文摘Background Shanghai HIgh repetition rate XFEL aNd Extreme light facility(SHINE)is a free electron laser facility,which will provide research methods such as high-resolution imaging for many disciplines.The pixel detector,which is in the pre-research stage,is one of most important components of the facility.Purpose The current target data rate of the pixel detector in SHINE is about 100 GB/s.Considering the high data rate,the 10G/40G Ethernet firmware for pixel detector in SHINE was developed on field programmable gate array(FPGA),which will lead to more integrated electronic design and make the system smaller.Methods The firmware converts the media independent interfaces(MII)of 10G and 40G Ethernet to each other and uses a polling method to process data from four 10G Ethernet channels.Based on the above methods,the firmware can merge four 10G Ethernet channels into one 40G Ethernet channel.Results and Conclusion The firmware successfully transmits data between the data source and the server.The bandwidth of the firmware is 36.66 Gbps when the computer equipped with 10G network interface controller(NIC)is set as the data source.Through joint test with the 1G/10G hub and SiTCP,the bandwidth of firmware is 36.3 Gbps.And 40 SiTCP nodes whose system clock frequency can exceed 125 MHz can be used as the data source of the firmware,which will provide a variety of technical solutions for pixel detector. | Yanke Cai Jie Zhang Hangxu Li Nian Yu Changge Zi Cong He Xiaoshan Jiang | 2021 | Radiation Detection Technology and Methods2021，5，3： | 1 |
| 3 | 2-19 Preparation of Uranium Monocarbide Microspheres显示文摘Uranium dioxide (UO2) has become the basic fuel material for power reactor industry. It has many excellences such as high melting point dimensional stability under irradiation and good mechanical property. Compared with UO2, uranium monocarbide (UC) also has the high fissionable material density and the good thermal conductivity, which can generate more power per kilogram. Therefore, UC is widely considered to be a potential nuclear fuel. | Guo Hangxu Li Sa Qin Zhi | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
| 4 | 2-20 Synthesis of Uniform Sizes of Uranium Dioxide Kernels by Test-tube Experimrent in the Laboratory显示文摘In the 1970s and 1980s, United States Department of Energy conducted numerous studies on the fabrication of nuclear fuel particles using the internal gelation process[1], the internal gelation process is an advanced production process for nuclear fuels. Recently, we had used these lessons learned on the internal gelation process to prepare quantities of uranium dioxide kernels of uniform sizes. This paper discusses the whole efforts of experimental processes. | Li Sa Guo Hangxu Qin Zhi | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
| 5 | 2-21 Key Step of Dispersing Carbide in the Preparation of Uranium Carbide Microspheres with Internal Gelation Method显示文摘Uranium carbide kernels is one special fuel materials for the High-Temperature Gas-cooled Reactor[1], which can improve nuclear fuel’s efficiency, longevity, and safety. In the fabrication process, there are many factors affect the quality of the kernels, such as subsequent ageing, HMTA/uranium mole ratio, gelation forming temperature, washing step, heating rate of the calcine and sinter step, one important step is the dispersing carbon into the solution stock of HMTA and urea[2;3]. | Li Sa Guo Hangxu Qin Zhi | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
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