DYNAMIC ANALYSIS OF SPINDLE     

Yang Yudin Liu Dejun 《保鲜与加工》1990,(1):110-118

In this paper, taking a D1201 spindle as an example, we discuss the dynamic analysis of spindle by using the theory of the complex model, we also analyse the factors which effect the dynamic characterics of spindle and give results which arc reference value to improving the structure of spindle,  相似文献   

Flow Path Mathematical Modeling of Total Artificial Heart Test System     

ZHENG Xiao-lin  CAO Yong  DENG Xiao-yan  PENG Cheng-lin  LIAO Bin 《保鲜与加工》2007,(10):119-125129

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Solid Model Design on the Features of Products     

LI Shao bin 《保鲜与加工》2002,(4):29

To research the problem of plastic art design and emulation of products with the virtual reality technology can short the product development cycle and reduce the cost. This paper discusses the information based on the product feature ,solid model with parameters, the structure and function of this system. Combined the product properties with its solid model. Proposed a method with CAD to create the model of the product based on features in the product design. Expressed its feature parameter and shape of model fully .In the case for a deceleration box the feature model has solved the problem of physical information ,geometry information and the informative process in its production management system efficiently.  相似文献   

The Essential Procedure of Numerical Simulation for Hydrodynamic in River and Coastal Engineering     

ZHOU Hua-jun 《保鲜与加工》2001,(5):1

Hydrodynamic models have been widely applied to river and coastal engineering projects. Understanding the hydrodynamic process is a prerequisite to modeling the pollution and sediment transport process. Hydrodynamic models of varying degrees of complexity should be selected appropriately according to the object of study, physical properties of the flow domain and hydrodynamic features. The essential procedure of hydrodynamic simulation is described in this paper. The main problems such as selection of model dimension in physical space, choice of variables, boundary conditions, initialization, design of computational grid, model resolution, parameterization of smaller scale fluctuations and sub-grid scale processes, model calibration and verification are investigated.  相似文献   

Research on the System and Models of Society-Economy-Environment Appraisal for Construction Project     

FENG Wei-min~ 《保鲜与加工》2004,(6):103-108

The society-economy-environment appraisal for construction project can help our government to control macro-economy, make correlation policy and formulate laws and draw up city plan.It has great influence on the sustainable development of our society and it is the demand of the law for the environment evaluation in China.This paper introduced the basic structure of society-economy-environment appraisal system for construction project and the thought of elements transaction.Using the method of AHP, the model of project analyzing and optimizing selection is designed.For the more, the methods of the optimizing models on the selected schemes are put forward.Finally, the integrative analysis has been made on the system design and appliance of this appraisal system.  相似文献   

Harmonic Analysis and Suppression of High-frequency Welding Devices     

LUO Sheng-jin  DU Xiong  ZHOU Luo-wei 《保鲜与加工》2005,(2):26-31

This paper analyzes the structure and line current waveform of 3-phase AC voltage regulation circuit. As an application of 3-phase AC voltage regulation circuit, a high-frequency welding device's simulation model and harmonic analysis of line current are presented. Results of simulation are compared to field measurements. The two are in a good agreement, so this simulation model is correct. Two single-tuning filters and one second-order HPF are designed according to the device's harmonic condition. Simulation results of the circuit with filters indicate decrease of the harmonics in current of power supply, and the waveform is close to sinusoidal wave, which prove correctness of the solution to harmonics pollution.  相似文献   

Developing Method Based on Object-oriented Modeling Techniques for Management Information System     

ZENG Yi 《保鲜与加工》2001,(2):49-52

A developing method is given which based on object-oriented modeling techniques for management information systems.The modeling techniques,especially,from CDM to PDM conversion,make it possible that the method can be used for developing such management information systems which based on relational database.The result shows that it can raise the efficency of the system developing,improve the system tability,enhance the system maintenability.  相似文献   

Building Enviornmental Monitoring System With COM     

WANG Ji feng  PENG Dong bin 《保鲜与加工》2001,(4):48-50

This article presents an implement of component using COM technology for collecting environmental monitoring data in environment monitoring system. The component makes the separation of data collection and data analysis available.Simultaneously by using the interface of connectable object in COM,itmakes the cooperation of the environment monitoring software with other parts of fault management software available,and also the seamless connection.It improves the system's performance by adding extensibility and potential cooperatibility.  相似文献   

Optimization of Curve Fitting Used in Development of Magic Formula Tire Model     

REN Guang-sheng 《保鲜与加工》2001,(3):22-25

Characteristics of a tire are the foundation of vehicle dynamics studying, especially play a vital role in vehicle handling study. It is necessary to establish a tire model in the simulation for vehicle handling because the tire characteristics got by test can not be satisfied.The optimization of fitting to the tire test data curves by Magic Formula is discussed, included the digitalization of tire test data curves, designing objective functions and optimization processes,etc. Finally the parameters in Magic Formula tire model are obtained and they lay a foundation for the development of vehicle handling aftertime.  相似文献   

A Study on Human Simulation Intelligent Control Algorithm to a Category of Objects     

Tu Yaqing Huang Shanglian Li Zushu 《保鲜与加工》1993,(6):8-15

Based on the model of Human Simulation Intelligent Controller (HSIC) presented briefly, a detailed algorithm was described for the servo system control by using the method of HSIC. Simulation results obtained proves the good performance of the control algorithm.  相似文献