检索结果-内蒙古大学图书馆

Identification and recovery path planning of Marine garbage patch based on Machine vision

Journal of Physics: Conference Series 2021年第1期1907卷

作者： Wenbin Zhang Sheng Zhao Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China. Wuhan University of Technology Wuhan China.

At present, the environmental problems in the water are becoming more and more prominent, and many teams are working on the research of the automation of garbage collection at sea. In order to a ready-made sea on the garbage recycling equipment automation, intelligent recognition for all white plastic and in identifying regional planning the path of the recycling of recycling equipment, aiming at different times during the day under the sea lighting situation, puts forward a visual processing and multi-step sea boundary identification method. After the image is processed by using two peak method normalized Canny boundary scan and other methods, the vertical and horizontal scanning and boundary recognition are carried out to obtain the closed Marine garbage main body area. Finally, Zigzag algorithm is used to carry out recovery path planning in the scanned area, and the results under different search radii are compared and analysed. The experimental results show that this method is applicable to a wide range of applications and has high accuracy and practicability, and the recognition results are satisfactory.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research on Vehicle Damping Control Strategy Based on In-Arm Torsional Electromagnetic Active Suspension

引用

Journal of Physics: Conference Series 2021年第2期1865卷

作者： Hongyang Zhang Weier Xiang Kailai Zhou Lin Xu School of Wuhan University of Technology Wuhan China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China

This paper proposes a new control strategy based on the In-Arm Torsional Electromagnetic Active Suspension (ITEAS), which can improve the vehicle ride comfort through adjusting the damper in ITEAS to optimize the kinetic characteristics of the vehicle composed by two ITEAS systems. Firstly, the structure and principle of the new type system is introduced followed by the description of the vehicle and the damper in ITEAS. Secondly, according to theoretical mechanics and fluid mechanics, the dynamic model of ITEAS system and the hydraulic model of shock absorber are established under forced vibration. Then, the PID control simulation model of the front suspension is established in AMESIM with a passive model as reference, due to the special assemble features of the vehicle. The rear suspension adopts predictive control method and the simulation model is built in MATLAB/SIMULINK, whose theory can be summarized as adjusting the duty ratio of the valve in damper to improve the stability of the vehicle under the condition that the road surface information is already known. Lastly, this paper tests the suspension characteristics on the MTS bench, which verifies the proposed control method improves the ride comfort performance and the feasibility of predictive system.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The Effects of Parameter Variations on the Torque Control of Induction Motor

The Effects of Parameter Variations on the Torque Control of...

引用

Conference on Vehicle Control and Intelligence (CVCI)

作者： Feixiang Zhao Jianwei Zhang Dongmei Wu Guoqing Liu Wensong Lang Pinglai Wang Automotive Research Institute China National Heavy Duty Truck Group Co.ltd. Jinan China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China

ISBN: (数字)9781728184975

ISBN: (纸本)9781728184982

By analyzing the principle and method of the direct vector control torque control method for induction motor, an analysis method of the influence of motor parameter changes on the accuracy of motor electromagnetic torque control under steady-state conditions is proposed, and the application of four common flux observations is derived. In direct vector control, the error function of the electromagnetic torque is estimated. The influence of the change of induction motor parameters on the torque control accuracy is theoretically analyzed, and the simulation is verified by Simulink. The simulation proves that the method can correctly analyze the torque control accuracy under the condition of induction motor vector control without complicated calculations.

关键词： Resistance Inductance Torque Induction motors Torque control Stators Observers

来源：评论

学校读者我要写书评

暂无评论

Study on the characterization of La0.7Sr0.3CoO3-δ perovskite catalyst and its catalytic performance for carbon black oxidation

引用

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and technology 2020年第6期48卷 735-740页

作者： Fang, Le Yu, Jing Guo, Guan-Lun Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China

In order to study the catalytic oxidation process of carbon black over La0.7Sr0.3CoO3-δ perovskite catalyst, two different contact modes of the catalyst and carbon black were designed, namely intimate contact and loose contact, and used to observe the reaction behavior. The results showed that the tig (light-off temperature) of carbon black decreased by 89.5 and 157.4℃ under intimate contact conditions compared with the loose contact and no catalyst contact conditions. Meanwhile, as the ratio of catalyst/carbon black increased, the tig, tm (maximum conversion temperature) and tf (burn-up temperature) of the carbon black all shifted to the low temperature, indicating that the catalyst had good catalytic performance for carbon black oxidation. © 2020, Science Press. All right reserved.

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Fault Diagnosis of Tractor Start System Based on Structural Analysis Method

Fault Diagnosis of Tractor Start System Based on Structural ...

引用

作者： Chang-qing DU Huan ZHANG Yi-duo ZHU Hubei Key Laboratory of Advanced Technology for Automotive Components(Wuhan University of Technology) Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan Technical College of Communications

In order to achieve accurate positioning of the electrical failure of the tractor starting system,this paper designs a fault diagnosis system based on structural ***,through the analysis of the traction battery and the starting motor,this paper selects four key faults:battery resistance fault,motor armature resistance fault,motor armature fault and motor joint fault,and establishes the electrical fault model of the tractor starting ***,this paper divides the variables in the fault model into known variables,unknown variables and fault *** the MATLAB dmperm command is used to analyze the observability and isolation of the unknown *** find that we can detecte and isolate four faults by adding a voltage sensor based on the original engine speed *** select three equation sets as the test set in all the structural minimum set of over-determined equations(MSO sets),and design the residual value of each test set as the observer of the *** faults detected by different observers are different,but 3 observers can detect 4 ***,we design the diagnostic strategy of the system:we select [-1,1] as the feasible domain of the *** the value of the observer exceeds the feasible domain,the fault characteristic parameter is 1,otherwise it is *** fault feature vector is composed of three fault characteristic parameters and used as system fault *** order to verify the correctness of the diagnostic system design,we use MATLAB to build the system simulation platform,which generated 4 faults in 3 s-4 s,6 s-7 s,9 s-10 s,12 s-13 s *** simulation results show that the results of the three observers are in line with the *** is determined that the fault feature vector can accurately locate the critical *** also shows the advantage of structural analysis for the electrical fault diagnosis of tractor starting systems,which can accurately locate system faults with only a small numb

关键词： Tractor Fault diagnosis Structural analysis method Detection Isolation

来源：评论

学校读者我要写书评

暂无评论

A pre-warning system of abnormal energy consumption in lead smelting based on LSSVR-RP-CI

引用

Journal of Central South University 2019年第8期26卷 2175-2184页

作者： WANG Hong-cai FANG Hong-ru MENG Lei XU Feng-xiang School of Energy Science and Engineering Central South University Changsha 410083 China School of Automation Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan 430070 China

The pre-warning of abnormal energy consumption is important for energy conservation of industrial engineering. However, related studies on the lead smelting industries which usually have a huge energy consumption are rarely reported. Therefore, a pre-warning system was established in this study based on the intelligent prediction of energy consumption and the identification of abnormal energy consumption. A least square support vector regression (LSSVR) model optimized by the adaptive genetic algorithm was developed to predict the energy consumption in the process of lead smelting. A recurrence plots (RP) analysis and a confidence intervals (CI) analysis were conducted to quantitatively confirm the stationary degree of energy consumption and the normal range of energy consumption, respectively, to realize the identification of abnormal energy consumption. It is found the prediction accuracy of LSSVR model can exceed 90% based on the comparison between the actual and predicted data. The energy consumption is considered to be non-stationary if the correlation coefficient between the time series of periodicity and energy consumption is larger than that between the time series of periodicity and Lorenz. Additionally, the lower limit and upper limit of normal energy consumption are obtained.

关键词： lead smelting energy consumption least square support vector regression (LSSVR) recurrence plots (RP) confidence intervals (CI)

来源：评论

学校读者我要写书评

暂无评论

Study on the Battery Safety in Frontal Collision of Electric Vehicle

引用

Journal of Physics: Conference Series 2021年第1期2137卷

作者： Weigao Qiao Lei Yu Zhanxi Zhang Tongyu Pan School of Automotive Engineering Wuhan University of Technology Wuhan Hubei 430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan Hubei 430070 China School of Intelligent Manufacturing Wuhan Huaxia University of Technology Wuhan Hubei 430070 China

With the rapid development of electric vehicle industry, more and more attention has been paid to the safety of the automotive battery. The safety of battery in electric vehicle's frontal collision is the focus of this paper. In the process of simulated collision, the research object is simplified into a battery box. The mechanical properties of the battery monomers were investigated to summarize the mechanical properties of the internal failure of the monomers. Constructing the finite element model of the research object, we focus on the analysis of collision simulation results and propose the improvement measures. According to the test requirements in C-NCAP, the crash simulation of battery box is carried out by using the finite element software called LS-DYNA, which is used in automobile collision to analyze the deformation, stress of the battery box and the most dangerous battery monomer during the frontal collision. The simulation results show that the deformation of the case is obvious, and the protection of the battery is lost in the 50km/h frontal collision condition. By adding EVA foam, the maximum deformation of the battery monomer is reduced by 8.2%. By improving the material of battery case, the maximum deformation is reduced by 12.65%.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Residual Value Evaluation of Operating Pure Electric Vehicles Based on Machine Learning

引用

Journal of Physics: Conference Series 2021年第4期1885卷

作者： Yujiu Wang Miaohua Huang Kailun Chen Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Research Center for New Energy & Intelligent Connected Vehicle Wuhan University of Technology Wuhan 430070 China

In view of the current imperfect second-hand evaluation system for new energy vehicles, there are limitations such as simple evaluation models, strong subjectivity, and large evaluation differences. This paper establishes the residual value evaluation model for operating pure electric vehicles, combining actual vehicle operation and maintenance data and establishes the residual value rate evaluation model based on the XGBoost algorithm and Boosted Trees enhanced algorithm. The multi-dimensional feature data of vehicle type, service time, mileage and region are extracted by feature engineering, and the evaluation system of residual value rate correction coefficient is established based on AHP. Finally, based on residual value rate evaluation model and the residual value rate correction coefficient system model to optimize the replacement cost method evaluation model, thereby constructing a complete residual value evaluation model. The model is based on actual vehicle operating data and machine learning algorithms, which has strong pertinence and real-time for the residual value evaluation of pure electric vehicles.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research on Predictive Cruise Control of Electric Vehicle Based on Time-Varying Model Prediction

Research on Predictive Cruise Control of Electric Vehicle Ba...

引用

Conference on Vehicle Control and Intelligence (CVCI)

作者： Dongmei Wu Huan Liu Feixiang Zhao Yang Li Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China Automotive Research Institute China National Heavy Duty Truck Group Co. Ltd Jinan China Technical Center of Dongfeng Commercial Vehicle Wuhan China

ISBN: (数字)9781728184975

ISBN: (纸本)9781728184982

For the problem of ecological cruise control integrating the terrain information of the road ahead, in order to input the actual slope changed with time over the prediction horizon, a linear time-varying model predictive controller is designed in this paper based on the traditional theory of model predictive control. The analysis of vehicle driving on flat road and hilly road is simulated by MATLAB/Simulink, results show that it has a good effect on energy saving at the cost of shorter distance. In addition, the energy consumption under different control targets and the influence of weight coefficients on vehicle economy under the same target are also analyzed and compared.

关键词： Roads Biological system modeling Heuristic algorithms Vehicle driving Predictive models Trajectory Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Modeling studies on divorced eutectic formation of high pressure die cast magnesium alloy

引用

China Foundry 2018年第1期15卷 58-65页

作者： Meng-wu Wu Lin Hua Shou-mei Xiong Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan 430070 China School of Materials Science and Engineering Tsinghua University Beijing 100084 China

The morphology and content of the divorced eutectic in the microstructure of high pressure die casting(HPDC) magnesium alloy have a great influence on the final performance of castings. Based on the previous work concerning simulation of the nucleation and dendritic growth of primary α-Mg during the solidification of magnesium alloy under HPDC process, an extension was made to the formerly established CA(Cellular Automaton) model with the purpose of modeling the nucleation and growth of Mg-Al eutectic. With a temperature field and solute field obtained during simulation of the primary α-Mg dendrites as the initial condition of the modified CA model, modeling of the Mg-Al eutectic with a divorced morphology was achieved. Moreover, the simulated results were in accordance with the experimental ones regarding the distribution and content of the divorced eutectic. Taking a "cover-plate" die casting with AM60 magnesium alloy as an example, the rapid solidification with a high cooling rate at the surface layer of the casting led to a fine and uniform grain size of primary α-Mg, while the divorced eutectic at the grain boundary revealed a more dispersed and granular morphology. Islands of divorced eutectic were observed at the central region of the casting, due to the existence of ESCs(Externally Solidified Crystals) which contributed to a coarse and non-uniform grain size of primary α-Mg. The volume percentage of the eutectic β-Mg_(17)Al_(12) phase is about 2%-6% in the die casting as a whole. The numerical model established in this study is of great significance to the study of the divorced eutectic in the microstructure of die cast magnesium alloy.

关键词： magnesium alloy high pressure die casting divorced eutectic microstructure simulation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：