In order to study the dynamic response of the unmanned aerial vehicle cabin door opening and closing system under impact load conditions, considering the flexible treatment of mechanical components, and the system’s ...In order to study the dynamic response of the unmanned aerial vehicle cabin door opening and closing system under impact load conditions, considering the flexible treatment of mechanical components, and the system’s motion with different stiffness of energy-absorbing components, a rigid-flexible coupling model of the cabin door actuation system was established in LMS. Virtual. Motion. In Amesim, a control model of the motor was created. Through the Motion-Amesim co-simulation module, the dynamic module of the system was combined with the motor control module to complete the electromechanical coupling simulation and analyze the results. .展开更多
Nowadays, the elevator has become an indispensable means of indoor transportation in people’s life, but in recent years this kind of traffic tools has caused many casualties because of the gate system fault. In order...Nowadays, the elevator has become an indispensable means of indoor transportation in people’s life, but in recent years this kind of traffic tools has caused many casualties because of the gate system fault. In order to ensure the safe and reliable operation of the elevator, the failure of elevator door system was predicted in this paper. Against the fault type of elevator door system: elevator door opened, excessive vibration when elevator door opened or closed, elevator door did not open or closed when reached the specified level. Three fault types were used as the output of the prediction model. There were 8 reasons for the failure, used them as input. A model based on particle swarm optimization (PSO) and BP neural network was established, using MATLAB to emulation;the results showed that: PSO-BP neural network algorithm was feasible in the fault prediction of the elevator door system.展开更多
A novel elevator door driven by tubular permanent magnet linear synchronous motor (TPMLSM) is presented. This TPMLSM applies axial magnet array topology of the secondary rod, air-cored armature windings and slotless s...A novel elevator door driven by tubular permanent magnet linear synchronous motor (TPMLSM) is presented. This TPMLSM applies axial magnet array topology of the secondary rod, air-cored armature windings and slotless structure of the forcer to improve the stability of the thrust. The influence of two major dimensions, the pitch and radius of the permanent magnet (PM), on magnetic field was studied and the best values were given by the finite element analysis (FEA). The magnetic field, back EMF and thrust of the motor were analyzed and the PM size was optimized to reduce the harmonic components of the magnetic field and improve the performance of the motor. Predicted results are validated by the experiment. It is shown that the performance of the motor and the novel elevator door system is satisfying.展开更多
The metro door system is one of the high failure rate subsystems of metro trains. The Failure Mode, Effects and Criticality Analysis (FMECA) method is applied to analyze the reliability of metro door system in this pa...The metro door system is one of the high failure rate subsystems of metro trains. The Failure Mode, Effects and Criticality Analysis (FMECA) method is applied to analyze the reliability of metro door system in this paper. Firstly, failure components of the door are statistically analyzed, and the major failure components are determined. Secondly, failures are classified according to their impacts on operation, and methods of calculating failure mode criticality and the related coefficients are illustrated. Finally, the FMECA is detailed in the selected 12 failure modes, and the failure modes are discovered that they have the most significant effect on metro door system. The obtained results can be used for optimal design and maintenance of the metro door system.展开更多
The robust design approach based on Taguchi′s design of experiment (DOE) coupled with the traditional finite element analysis (FEA) is applied to the static design of a sedan door.This method aims at shortening the d...The robust design approach based on Taguchi′s design of experiment (DOE) coupled with the traditional finite element analysis (FEA) is applied to the static design of a sedan door.This method aims at shortening the design period,reducing the calculation cost and improving the competitive competence.First,the performance requirements,the control factors and the corresponding levels are determined to design a DOE table.Second,based on the schemes from the DOE table,sensitive control factors are distinguished from the results of the FEA method.Finally,the optimum design is chosen after comparisons and analyses of these performance response graphs.Performance results of the optimum design indicate that the application of the robust approach and FEA can greatly improve the quality of the door system,satisfy the requirements of products,underline the design purpose and shorten the design period.展开更多
矢量软件在绘制产品及工程视图时会出现数据不够准确,参数化控制偏弱等情况,另一方面专业的CAD制图软件又让普通设计师难以下手。基于Adobe Illustrator平台上的Hot Door CADtools插件在这些的问题中找到了平衡点,它能既能够像专业的CA...矢量软件在绘制产品及工程视图时会出现数据不够准确,参数化控制偏弱等情况,另一方面专业的CAD制图软件又让普通设计师难以下手。基于Adobe Illustrator平台上的Hot Door CADtools插件在这些的问题中找到了平衡点,它能既能够像专业的CAD软件一样为图形标注提供准确的尺寸,同时又让CAD制图变得亲切和富有人性化。展开更多
文摘In order to study the dynamic response of the unmanned aerial vehicle cabin door opening and closing system under impact load conditions, considering the flexible treatment of mechanical components, and the system’s motion with different stiffness of energy-absorbing components, a rigid-flexible coupling model of the cabin door actuation system was established in LMS. Virtual. Motion. In Amesim, a control model of the motor was created. Through the Motion-Amesim co-simulation module, the dynamic module of the system was combined with the motor control module to complete the electromechanical coupling simulation and analyze the results. .
文摘Nowadays, the elevator has become an indispensable means of indoor transportation in people’s life, but in recent years this kind of traffic tools has caused many casualties because of the gate system fault. In order to ensure the safe and reliable operation of the elevator, the failure of elevator door system was predicted in this paper. Against the fault type of elevator door system: elevator door opened, excessive vibration when elevator door opened or closed, elevator door did not open or closed when reached the specified level. Three fault types were used as the output of the prediction model. There were 8 reasons for the failure, used them as input. A model based on particle swarm optimization (PSO) and BP neural network was established, using MATLAB to emulation;the results showed that: PSO-BP neural network algorithm was feasible in the fault prediction of the elevator door system.
基金Project (No. 50607016) supported by the National Natural ScienceFoundation of China
文摘A novel elevator door driven by tubular permanent magnet linear synchronous motor (TPMLSM) is presented. This TPMLSM applies axial magnet array topology of the secondary rod, air-cored armature windings and slotless structure of the forcer to improve the stability of the thrust. The influence of two major dimensions, the pitch and radius of the permanent magnet (PM), on magnetic field was studied and the best values were given by the finite element analysis (FEA). The magnetic field, back EMF and thrust of the motor were analyzed and the PM size was optimized to reduce the harmonic components of the magnetic field and improve the performance of the motor. Predicted results are validated by the experiment. It is shown that the performance of the motor and the novel elevator door system is satisfying.
文摘The metro door system is one of the high failure rate subsystems of metro trains. The Failure Mode, Effects and Criticality Analysis (FMECA) method is applied to analyze the reliability of metro door system in this paper. Firstly, failure components of the door are statistically analyzed, and the major failure components are determined. Secondly, failures are classified according to their impacts on operation, and methods of calculating failure mode criticality and the related coefficients are illustrated. Finally, the FMECA is detailed in the selected 12 failure modes, and the failure modes are discovered that they have the most significant effect on metro door system. The obtained results can be used for optimal design and maintenance of the metro door system.
文摘The robust design approach based on Taguchi′s design of experiment (DOE) coupled with the traditional finite element analysis (FEA) is applied to the static design of a sedan door.This method aims at shortening the design period,reducing the calculation cost and improving the competitive competence.First,the performance requirements,the control factors and the corresponding levels are determined to design a DOE table.Second,based on the schemes from the DOE table,sensitive control factors are distinguished from the results of the FEA method.Finally,the optimum design is chosen after comparisons and analyses of these performance response graphs.Performance results of the optimum design indicate that the application of the robust approach and FEA can greatly improve the quality of the door system,satisfy the requirements of products,underline the design purpose and shorten the design period.
文摘矢量软件在绘制产品及工程视图时会出现数据不够准确,参数化控制偏弱等情况,另一方面专业的CAD制图软件又让普通设计师难以下手。基于Adobe Illustrator平台上的Hot Door CADtools插件在这些的问题中找到了平衡点,它能既能够像专业的CAD软件一样为图形标注提供准确的尺寸,同时又让CAD制图变得亲切和富有人性化。
