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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
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
Progress and Consideration of High Precision Road Navigation Map
Liu Jingnan,Wu Hangbin,Guo Chi,Zhang Hongmin,Zuo Wenwei,Yang Cheng
Strategic Study of CAE 2018, Volume 20, Issue 2, Pages 99-105 doi: 10.15302/J-SSCAE-2018.02.015
With the rapid development of the Internet, an increasing number of new industries such as "Internet Plus" intelligent transportation and unmanned systems based on location-based services have been gradually developed. The development of these industries requires the support of high precision location data, which the 5 m accuracy of traditional navigation maps cannot provide. To overcome the drawbacks of traditional maps, high precision road navigation maps have been proposed. High precision road navigation maps can provide more detailed road information and are thus able to more accurately reflect the real situation of roads. Compared to traditional maps, high precision road navigation maps possess three advantages. First, they include additional map layers. Second, the content of the layers is finer. Third, a new map structure is divided. However, the rich information content of high precision maps leads to the generation of huge amounts of data. Traditional centralized big data processing modes are unable to meet the computing needs required for processing such huge amounts of data. Therefore, in this paper, we propose a big data processing model involving "crowdsourcing + edge computing" to address the problem of high precision map calculation. At present, high precision road navigation maps have kicked into a high gear. Nevertheless, certain problems persist that need to be addressed during the process of development.
Keywords： high precision road navigation map “Internet Plus” intelligent transportation unmanned systems crowdsourcing edge computing
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
Consensus-based three-dimensionalmulti-UAV formation control strategy with high precision Article
Mao-de YAN, Xu ZHU, Xun-xun ZHANG, Yao-hong QU
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 7, Pages 968-977 doi: 10.1631/FITEE.1600004
Keywords： Multiple unmanned aerial vehicles Consensus Cooperative guidance Cooperative control Synchronization technology
Control measures of installation precision of Three Gorges Project ship lift rack and nut column
Wei Yan,Peng Hanlin,Lin Fan
Strategic Study of CAE 2013, Volume 15, Issue 9, Pages 91-96
According to technology requirements of installation precision and characteristics of rack, nut column of Three Gorges Project ship lift, and combined with the integrated environment the installation method and installation accuracy control elements have been in detailed analysis, put forward the suitable rack, nut column installation construction process and control measures for Three Gorges Project ship lift. In engineering practice, use the test of datum point to control installation precision of the rack and nut column, put forward the method that screw of finish machining technology to cooperate with jack to readjust as reinforcement measures of installation of the rack, nut column. Thus various high precision standard technical difficulties of installation of the rack, nut column, have been solved, provides the beneficial reference for the similar engineering construction.
Keywords： Three Gorges Project ship lift rack nut column installation of control precision control
XB High Accuracy Rocket Sled Test Track
Yang Xingbang
Strategic Study of CAE 2000, Volume 2, Issue 10, Pages 98-104
Rocket sled test track is a large ground dynamic simulating test facility. It is used for the tudy of solving technical problems that occurred to the testing articles during their operations at high speed and high acceleration in the sky. The constructional key point of the track is the track´s relative linearity precision of one millionth. A stable track foundation, high linearity base line and smooth and surface bright rails are the foundamental conditions for the track. It needs also many new technologies, such as the specially machined rails, rail welding techniques, supersonic flaw detecting for welding, prestress tie-down of the track, straightness alignment, etc. China has successfully built the world ´s only track —XB high accuracy rocket sled test track, of which the rails are specially machined and then welded continuously. This paper describes the background, design approach, technical plan, measurement data, applications, future prospects as well as the technical and constructional characteristics of the track. It indicates the linearity of the track has reached advanced world level.
Keywords： rocket sled test track ground dynamic simulating test
A High Accurate Steady-state Physical Model for High-voltage VDMOS
Bao Jiaming,Sun Weifeng,Zhao Ye,Lu Shengli
Strategic Study of CAE 2008, Volume 10, Issue 2, Pages 72-78
A high accurate steady-state physical model for high-voltage VDMOS is proposed in the paper. In the model, a more proper assumption result in obtaining both the electric field and the voltage in the double diffused channel region by analytical method; and after studying physical characteristic of VDMOS in detail, a differential equation concerning the electric field of the drift region is obtained, moreover, the analytical solution of this differential equation is given for the whole drift region, then the voltage drop of the drift region is obtained. The result shows that the calculation stability in the region adjacent to saturation of the drain current are improved in the paper´s model, and furthermore, the calculation prec ision of the paper´s model is high. Especially in the condition of high gate vol tage and high drain voltage it is improved to a great extent.
Keywords： VDMOS steady-state physical model analytical method
The processing and precision control of large thinwall steel caisson
Peng Wu,Lin Fan,Zhao Qiang,Ma Jianle
Strategic Study of CAE 2010, Volume 12, Issue 4, Pages 21-24
It was discussed the proper choice for processing and welding technology of large thin-wall steel caisson in Taizhou Bridge. According to the caisson's characteristics of large size and thin wall, reasonable welding and assembly methods were adopted to effectively control precision in the processes of fabricating and assembling pieces of each unit and the whole caisson, and the welding and anti-deformation precision of thin-wall steel sheet can be controlled too. Thus the processing quality was guaranteed.
Keywords： large thin-walled steel caisson processing precision control
Influencing factors research of GPS buoy measurement precision
Yan Longhao,Chen Chuntao,Zhai Wanlin,Zhu Jianhua,Zhang Qian,Zhang Xiaoxu
Strategic Study of CAE 2014, Volume 16, Issue 6, Pages 102-108
Satellite altimeter was widely used in ocean monitoring and research, in order to find out the actual performance of the altimeter and access the accuratesea level data, we need to calibration. GPS buoys was mainstream devices in altimeter absolute calibration. Through simulation and experiment about the self-developed GPS buoy, this paperstudied the precision of GPS bouy and factors affecting.The results show that the self-developed GPS GPS buoy elevation measurement precision can reach 1 cm, meet the altimeter sea surface height calibration requirements.
Keywords： GPS buoy precision factors affecting altimeter calibration
Studies on Precise Spacecraft Navigation and Positioning Using GPS
Xiang Kaiheng,Qu Guangji
Strategic Study of CAE 2004, Volume 6, Issue 1, Pages 86-91
In this paper, GPS measurement technology, Encke method to solve satellite orbit perturbation and generalized Kalman filtering technology are organically combined together, and an innovative solution— carrier phase & pseudorange integrated dynamic orbit determination (CPPIDOD) for low earth orbit spacecraft on-board autonomous precise navigation and positioning using GPS is presented. Difficult problems of dynamically resolving of integer ambiguities and amendment of cycle slips in the application of GPS carrier phase have been solved. Based on all these, technique of carrier phase & pseudorange integrated dynamic differential relative navigation between two spacecrafts is brought forward. Results of numerical simulation analyses and semi-physical simulation tests show that the solutions presented in this paper are feasible. They can significantly improve the performance of GPS positioning, and their models, algorithms and software are practical for engineering use.
Keywords： spacecraft navigation GPS carrier phase Kalman filtering
High-accuracy target tracking for multistatic passive radar based on a deep feedforward neural network Research Article
Baoxiong XU, Jianxin YI, Feng CHENG, Ziping GONG, Xianrong WAN,jessiexu@whu.edu.cn,jxyi@whu.edu.cn,cwing@whu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 8, Pages 1214-1230 doi: 10.1631/FITEE.2200260
Keywords： Deep feedforward neural network Filter layer Passive radar Target tracking Tracking accuracy
A High-Precision US-Guided Robot-Assisted HIFU Treatment System for Breast Cancer Article
Tianhan Tang,Takashi Azuma,Toshihide Iwahashi,Hideki Takeuchi,Etsuko Kobayashi,Ichiro Sakuma
Engineering 2018, Volume 4, Issue 5, Pages 702-713 doi: 10.1016/j.eng.2018.07.008
Breast cancer is the most commonly diagnosed cancer in women. A strong treatment candidate is high-intensity focused ultrasound (HIFU), a non-invasive therapeutic method that has already demonstrated its promise. To improve the precision and lower the cost of HIFU treatment, our group has developed an ultrasound (US)-guided, five-degree-of-freedom (DOF), robot-assisted HIFU system. We constructed a fully functional prototype enabling easy three-dimensional (3D) US image reconstruction, target segmentation, treatment path generation, and automatic HIFU irradiation. The position was calibrated using a wire phantom and the coagulated area was assessed on heterogeneous tissue phantoms. Under the US guidance, the centroids of the HIFU-ablated area deviated by less than 2 mm from the planned treatment region. The overshoot around the planned region was well below the tolerance of clinical usage. Our system is considered to be sufficiently accurate for breast cancer treatment.
Keywords： HIFU Breast cancer US-guided navigation Medical robotics Accuracy evaluation
Title Author Date Type Operation
High Precision Adaptive Predictive Control for Cruise Missile
Sun Mingwei,Chen Zengqiang,Yuan Zhuzhi,Ren Qiang,Yang Ming
Journal Article
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
Progress and Consideration of High Precision Road Navigation Map
Liu Jingnan,Wu Hangbin,Guo Chi,Zhang Hongmin,Zuo Wenwei,Yang Cheng
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
Consensus-based three-dimensionalmulti-UAV formation control strategy with high precision
Mao-de YAN, Xu ZHU, Xun-xun ZHANG, Yao-hong QU
Journal Article
Control measures of installation precision of Three Gorges Project ship lift rack and nut column
Wei Yan,Peng Hanlin,Lin Fan
Journal Article
A High Accurate Steady-state Physical Model for High-voltage VDMOS
Bao Jiaming,Sun Weifeng,Zhao Ye,Lu Shengli
Journal Article
The processing and precision control of large thinwall steel caisson
Peng Wu,Lin Fan,Zhao Qiang,Ma Jianle
Journal Article
Influencing factors research of GPS buoy measurement precision
Yan Longhao,Chen Chuntao,Zhai Wanlin,Zhu Jianhua,Zhang Qian,Zhang Xiaoxu
Journal Article
Studies on Precise Spacecraft Navigation and Positioning Using GPS
Xiang Kaiheng,Qu Guangji
Journal Article
High-accuracy target tracking for multistatic passive radar based on a deep feedforward neural network
Baoxiong XU, Jianxin YI, Feng CHENG, Ziping GONG, Xianrong WAN,jessiexu@whu.edu.cn,jxyi@whu.edu.cn,cwing@whu.edu.cn
Journal Article
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