Research on key technology of multi-radar network and cooperative detection by QI Chongying, HE Feng, CHEN Chao

“…Firstly, the operational capability requirements of radar network are introduced. Secondly, based on the traditional tree hierarchical structure of radar network, the new distributed network architecture is given. …”
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Structural Parameter Analysis and Optimization of Six-link Double-crank Slider Mechanism of Stamping Machine by Liu Shanmin, Wu Ziyue, Liu Shanzeng

“…Firstly,the kinematics of the six-link double-crank slider mechanism is deduced,and the function expression of each structural parameter is obtained. Secondly,based on the proposed optimization design mathematical model and MATLAB software,the optimization design,kinematics simulation analysis and kinematic characteristics of the six-link double crank slider mechanism are carried out. …”
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Determination method of mine microseism source depth under latitude and longitude coordinates by WANG Meng, WANG Guofu, ZHANG Faquan, HUANG Guiqiang

“…Firstly, plane coordinates and start time of microseism source are calculated through an improved linear location method. Secondly, based on epicentral distance and travel time of microseism between microseism source and station, TD mode fitting is conducted firstly and DT mode fitting is conducted after eliminating error data. …”
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Stiffness Analysis of a New Low Coupling 3T1R Asymmetrical Parallel Mechanism by Xu Zhengxiao, Wu Guanglei, Shen Huiping

“…Firstly, the topological structure of the mechanism is described. Secondly, based on the virtual spring method, the stiffness model of each branch is established and its stiffness matrix is solved. …”
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Research of Wavelet Neural Network State Degradation Prediction of Rolling Bearing New Time Domain Index by Li Wenfeng, Xu Aiqiang, Sun Jijie, Fan Fuqin

“…The sensitivity of time domain index of fault is analyzed based on size of bearing fatigue damage and number of local damage. Secondly,based on the traditional time domain index,two more sensitive time domain index ‘TALAF ’and ‘THIKAT ’is searched. …”
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RESEARCH ON EARLY WARNING METHOD OF ROTOR VIBRATION OF TURBOGENERATOR UNIT (MT) by HUANG YangSen, LIU YunPing, WANG Yong, FENG XiaoJian, LIU Xiong

“…Firstly, the running law of rotor vibration is analyzed. Secondly, based on the vibration operation law, the calculation method of rotor vibration abnormal threshold is proposed. …”
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Research on Potential Fault Early Warning Method of Nose Wheel Steering System of Aircraft by HUANG Shijie, CAI Jing, HE Sheng

“…Firstly,on the basis of analyzing the failure mode of NWS,the monitoring QAR parameters relating to the NWS failure are selected and handled. Secondly,based on the normal and faulty cases of NWS,combined with the operational principle of NWS,the Pearson correlation coefficient analysis method is used to determine the potential failure characteristics of the low correlation between the command value and actual value,so as to realize the detection of potential failure. …”
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1R Pseudo-rigid-body Model of Initially Curved Flexible Beam with End Loaded Moment by Li Yuan, Du Qiuyue

“…The theoretical results are given with example,and are compared with ANSYS simulation to verify the effectiveness of the theory. Secondly,based on the1 R pseudo-rigid-body model（ PRBM） of the straight beam subjected to the moment,the 1 R PRBM of the initially curved flexible beam subjected to the moment is firstly developed and is compared with the theoretical results to verify its effectiveness. …”
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Automatic Analysis Algorithm of Position and Orientation Characteristic Set of Parallel Mechanism based on Neural Network by Wang Gang, Mao Zhiwei, Luo Yufeng, Shi Zhixin

“…First of all,by analyzing the topological structure of parallel mechanism,the essence is summed up. Secondly,based on the neural network theory,the topological structure of parallel mechanism is described and digitized. …”
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Analysis of residents' demand response behavior considering multiple influencing factors by LIU Xiaofeng, CHEN Xueying, BAI Ying, WANG Wei

“…Firstly,a multi-factor influence model is developed based on the main influencing factors,namely social relationships,attribute influence and their own willingness. Secondly,based on the interaction among the three levels of factors and the Markov property of decision-making process,Markov decision equations are established for residents' DR,which are applied to analyze the characteristics of DR behavior at different stages. …”
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Taxiing Characteristic Analysis and Control for Full-Wing Solar-Powered Unmanned Aerial Vehicle

“…Meanwhile, the taxiing characteristics of full-wing solar-powered UAV in different taxiing speeds are analyzed. Secondly, based on the linear active disturbance rejection control (LADRC) theory, a yaw angle controller is designed by using differential propeller thrust as the control output. …”
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Modeling Analysis and Simulation Verification for Drive Tooth Stress of Rubber Track Wheel by Zihan Zhao, Xihui Mu, Fengpo Du, Jianhua Guo

“…The optimization results show that the accuracy of the mapping tooth profile obtained by this method is 0.12%，which effectively improves the mapping accuracy. Secondly，based on the complex function method， the mathematical model for stress and deformation is established，and the stress distribution laws under different meshing positions are analyzed. …”
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Type Synthesis of Mobile Mechanisms with Multiple Modes based on Single-loop Kinematic Chains by Zhang Chunyan, Liu Xiangyu, Ni Cong, Lu Chenhui

“…Aiming at the functional requirements of mobile mechanisms with multiple modes，a design scheme based on single-loop kinematic chains is proposed.Firstly，according to the single-loop freedom formula，the conditions satisfying the single-loop and can be active are determined，and the combination relationships among the order of the constrained screw system，the number of bars，the number of kinematic pairs and the degree of freedom of the single-loop kinematic chains are obtained.Secondly，based on the screw theory，the geometric conditions of the axis of kinematic pairs under different constrained screw orders are obtained by using the virtual work principle.Taking the R and P pairs as the design units，all the possible combinations of the single-loop kinematic chains under different degrees of freedom are enumerated，and then the constructed single-loop kinematic chains are used as the body or branch to construct a kind of mobile mechanisms with multiple modes.Finally，the steps of type synthesis of mobile mechanisms with multiple modes and some design cases are given，which verifies the feasibility and practicability of the proposed design theory and design method.…”
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WFMHT Method of Orbit Maneuver Detection Based on Space-Based Bearing-Only Measurement

“…The innovation characteristics of the normal orbit and orbit maneuver are analyzed and compared. Second, based on the hypothesis test methods of the distribution characteristic of the stochastic sequence, the WFMHT (i.e., weighted fusion of multi hypothesis tests) method with the innovation is put forward to detect the orbit maneuver. …”
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Profile Shaped-configuration of Convex Ellipse Rotor and Its Following High-shape Technology by Xiangjun Yang, Fuchun Sun

“…Firstly， from ellipse coordinate equation of rotor shaped-profile and conjugate principle of rotor pairs and critical conjugate conditions， the optimum axial length ratio of ellipse arc and the maximum shape coefficient of basic rotor are calculated. Secondly， based on the geometric relationship when the endpoint of valley working shaped-profile on driving rotor is just perfect to avoid the peak corner point on driven rotor， the maximum shape factor of raised rotor under a given addendum angle is determined. …”
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Structure design and reliability analysis of Al-Ti lugs

“…Firstly, the damage safety design and life reliability analysis of the lug structure are studied theoretically. Secondly, based on the concept of damage safety design and the design principle of deformation coordination, the design method of composite connection lug with deformation coordination is proposed, and the thickness ratio of single ear is 0.8:1:0.8. …”
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Incentive Mechanism for Continuous Crowd Sensing Based Symmetric Encryption and Double Truth Discovery by XU Miaomiao, CHEN Zhenping

“…Aimed at the problems in continuous crowd sensing,such as the increased privacy requirements,the unreliable perception data collected and the low enthusiasm of users to participate,this paper proposes an incentive mechanism based on symmetric encryption and double-layer truth discovery(SDIM).First,the symmetric encryption algorithm is used to protect the privacy of the perceived data.When the privacy requirements are high and the number of perceptions is large,the computing overhead and the time of data encryption and reward computing will be greatly reduced.Second,based on a double-layer truth discovery model,an incentive mechanism supporting data reliability evaluation is proposed.The purpose is to simultaneously realize the real time reward of continuous crowd sensing,and improve the fairness of reward when the participants have malicious behavior.Finally,the dual privacy analysis of the proposed method is illustrated.The simulation results show that the proposed method can effectively calculate the true value and the reward according to the data reliability.Notably,it is obviously superior to the comparative model in the time of data encryption and reward computing,and can calculate the reward more fairly when the participants have malicious behavior.…”
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Research on Influence of CMM Sampling Points on Detection of Feature Parameters for Turbine Blade

“…In order to understand the correlation between the sampling strategy and the accuracy of blade profile feature parameters, firstly, the extraction methods of turbine blade feature parameters were proposed, and these methods were compiled into an executable program TBGeoInspect. Secondly, based on the level principle, the unified mathematical representations of uniform sampling, curvature-based sampling, chord deviation sampling, weighted curvature-based sampling, and curvature-arc length sampling were given. …”
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THERMAL CHARACTERISTIC ANALYSIS METHOD OF MOTORIZED SPINDLE BASED ON THERMAL LOAD OPTIMIZATION CORRECTION by MENG LingCong, LI ChenTao, YU Bing, LIU Teng, ZHANG JianJun

“…For the inaccuracy of empirical heat loads for spindle thermal simulations,a thermal simulation analysis method onto motorized spindle unit is proposed.Firstly,the fluid-solid-heat coupling simulation model of the motorized spindle unit is established by Ansys Workbench,with the coolant dynamic heat transfer and thermal resistances of bearing inner-spindle shaft and outer rings-bearing housing being considered.Secondly,based on the simulation model,genetic algorithm is used to optimize and correct the heat generation values of spindle motor/beairngs and ambient heat transfer coefficients.The corrected values above are used as thermal loads for thermal simulation modeling of motorized spindle unit.Based on the model,the dynamic relationship between the heat dissipation power of the coolants and the heat generation power of spindle motor/beairngs is studied.Finally,the model accuracy is verified by the spindle temperature testing experiment.The results show that the optimization correction model can effectively improve the temperature field simulation accuracy of the motorized spindle unit,and the spindle structure and the coolant reach the optimal heat-heating balance when the coolant supply temperature is about 2℃ lower than the ambient temperature.…”
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Unified Calculation Model and Its Verification of Gear Cross-section Area for Arbitrary Tooth Profile by Yulong Li, Jun Fan, Xiurong Li, Yong Zang

“…Firstly， based on the external conjugate relation between two identical gear， it is analyzed that cross-section area of gear is composed of pitch circle area， plus conjugated area， and minus minimum top gap area. Secondly， based on the geometric relationship of conjugate profile， the simplest calculation formula without error of the conjugated area and simplified calculating method of minimum top gap area adopts partial hob are given. …”
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