Hangzhou, China
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Bao W.,Hangzhou Polytechnic
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2014

Lifting mast, made of aluminum alloy hollow tube combined by pneumatic seals, is required to work under 6 levels of wind load. The bending strength and buckling stability is analyzed based on the view of strength and compressive bar stable of lifting mast. The solving formula of variable cross section bar stiffness is derived by using the method of energy and the equivalent stiffness. The impact on the stability of the lifting mast is obtained though stress calculation for a given arrangement of the cordelle design, which has certain guidance for the lifting mast design.


Min Z.,Hangzhou Polytechnic
Open Automation and Control Systems Journal | Year: 2015

The vibration velocities of the seat platform and traditional mechanical reduction vibration device were measured through tests, which provided certain basis for proposing and design of the parallel mechanism with six degree of freedom in subsequent paragraphs. Adopting the parallel mechanism as the main part of the seat and the active joints with spring damping elements as the reduction vibration actuator, then the reduction vibration seat model with the 3-PRPS parallel mechanism with six degree of freedom was established. With position and attitude of the mechanism as the premise, stability indexes of the reduction vibration seat in motion were put forward, and then getting the task space of moving platform by the inverse solution of the mechanism position. To achieve reduction vibration effectively, branched chain velocity matrix was built by vector method. Optimal parameter values were obtained by MATLAB numerical calculation to improve the reduction vibration space and flexibility. Finally, simulation analysis was carried out on the results. Meanwhile, comparison was carried out on the reduction vibration effects of the parallel mechanism with six degree of freedom and traditional mechanical reduction vibration device. The results show that this mechanism has a better vibration reduction performance, which provides a new thought for designing reduction vibration seat. Meanwhile, it also provides important reference for application and research of other parallel mechanisms. © Zhuang Min.


Min Z.,Hangzhou Polytechnic
Open Automation and Control Systems Journal | Year: 2015

In this paper, the research object is cycling equipment which is common fitness equipment. The dynamic characteristics of the cycling equipment were optimized in a virtual prototype, and analysis was carried out on its structural mechanical characteristics and dynamic performance, etc. The dynamic characteristics of this cycling equipment were obtained through modal, random response and harmonic response analyses, and the structural reasonability after optimization was verified. This can avoid unreasonable design of the cycling equipment, and an effective analysis and assessment method for cycling equipment design was proposed. © Zhuang Min.


Zhuang M.,Hangzhou Polytechnic
International Journal of Simulation: Systems, Science and Technology | Year: 2016

To improve the accuracy, rapidity, comfort and user friendliness of intelligent wearable device, this paper used the grey relational analysis model for the design process. The development status and key technologies of intelligent wearable device are analyzed in this paper, including sensor technology, display technology, chip technology, operating system, wireless communication technology, data processing technology and improve battery life extension technology. In accordance with the characteristics of intelligent wearable device, the grey relational analysis algorithm has been researched and combined with expert system. Thus the developing platform based on grey relational analysis can be used for intelligent wearable device is designed and implemented. The final test indicates that the grey relational analysis algorithm is simple in calculation and its result is accurate; the simulation result of expert system is consistent with the theoretical analysis result. © 2016, UK Simulation Society. All rights reserved.


Zhang X.L.,Hangzhou Polytechnic
Applied Mechanics and Materials | Year: 2014

Traffic congestion are prevalent in worldwide cities. The imbalance between demand and supply of urban traffic is the root cause of this problem. So taking effective measures to regulate traffic demand, and guiding the traffic problems of the supply and demand balance is the best way to solve traffic congestion. This paper improves the TDM measure, and combines with intelligent information platform for the design of a new urban transport demand management adaptability of dynamic traffic data analysis platform. The platform supported by the technology of wireless sensor communications, intelligent terminals, the Internet and cloud computing is facing with the dynamic needs of traffic flow and traffic congestion state to carry out the operations of spatiotemporal data mining, clustering, and track detection, and to apply it into the traffic hot spots, abnormal driving track, traffic congestion trends and traffic flow detection and analysis, which has a good reference value for the improvement of management and service level of traffic intelligent systems. © (2014) Trans Tech Publications, Switzerland.


Wang J.,Hangzhou Polytechnic
RISTI - Revista Iberica de Sistemas e Tecnologias de Informacao | Year: 2016

In this paper, the author analyzes the theory and method of injection mold CAD/CAE technology, and completes a set of car grille injection mold design. By using CAD/CAE technology in the mold design and manufacture, enterprise could greatly improve the design level of plastic mold and product quality. The injection molding process of plastic parts is simulated by MoldFlow software, and the author makes evaluation of gating system and cooling system. Under the manual modeling and Wizard Mold environment, we construct the solid model of each structural component refers to the CAE analysis results. The result shows that application of CAE/CAD technology to complete the design of injection mold for automobile grille could avoid the common five kinds of defects of the grid plastic parts, and it will improve the efficiency of the mold design.


Zhang X.-L.,Hangzhou Polytechnic | Xu Y.-J.,Zhejiang Agriculture And forestry University
Applied Mechanics and Materials | Year: 2014

Fault diagnosis of Diesel engine cylinder head is very complex, so it is difficult to use the mathematical model to describe their faults. In this study, support vector machine trained by genetic algorithm based on high frequency demodulation analysis is proposed to fault diagnosis of Diesel engine cylinder head. Genetic algorithm is used to determine training parameters of support vector machine in this model, which can optimize the support vector machine (SVM) an intelligent diagnostic model. The performance of the GSVM system proposed in this study is evaluated by Diesel engine cylinder head in the wood-wool production device. The application to fault diagnosis for diesel engine shows the effectiveness o f the method. © (2014) Trans Tech Publications, Switzerland.


Chen X.-Y.,Hangzhou Polytechnic
Advanced Materials Research | Year: 2013

In this paper, an optimized method of orthogonal experiment design is studied to determine the processing parameters in order to minimize the warpage of the supporting-foot plastic part. Considering the injection processing parameters such as melt temperature, mold temperature, injection time, packing pressure and packing time, a series of CAE simulation experiments are applied to reveal the warpage. The relative significance of each processing parameter on warpage is also acquired based on the range analysis of the results. Finally, verification test with the optimal levels of the processing parameters is also carried out. © (2013) Trans Tech Publications, Switzerland.


Xueli F.,Hangzhou Polytechnic
International Journal of Simulation: Systems, Science and Technology | Year: 2016

The idling of engine has natural and random fluctuations of rotation speed caused by variations in engine intake, volatility of exhaust and randomness of combustion, which are all present during the idling state. Changing ignition advance angle can rapidly control the rotation speed accurately, the reason for which is that ignition advance can influence the torque of engines. The research reported here aims to design fuzzy algorithms to control the idling speed of automotive engines. The output of fuzzy interference is duty cycle ratio and ignition advance ratio of air bypass valve control signal. The engine bench test results indicate that the method can shorten warm-up time and stabilize speed fluctuation during idling, and the control effect of idling stability is equivalent to the original engine. © 2016, UK Simulation Society. All rights reserved.


In this paper, we study hybrid synchronization and parameter identification of uncertain interacted networks and investigate inner synchronization and outer synchronization between these two networks. Based on the linear matrix inequality (LMI), we obtain the synchronous conditions for the inner synchronization in the form of LMIs. When the node dynamical equation has an unknown parameter vector, we design the appropriate controllers to realize the outer synchronization and simultaneously identify the unknown parameter. Finally, we provide two numerical examples to show the efficiency of the obtained theoretical results. © 2016 Elsevier GmbH. All rights reserved.

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