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 Posted: Sat 11:43, 06 Nov 2010 Post subject: ugg boots günstig Matlab-based Grey GM (1,1) mode |
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Matlab-based Grey GM (1,1) model in Machinery Industry Inquiry
Forecast length X'o (after +1) = 1.8062 (1-em60) en606 the original series, model simulation and from both the absolute value of residuals, correlation coefficient,[link widoczny dla zalogowanych], the actual variance, calculation of variance,[link widoczny dla zalogowanych], the relative error and other projects order,[link widoczny dla zalogowanych], see Table l. General Statistics of the data in Table 1,[link widoczny dla zalogowanych], I calculate the absolute residuals () correlation coefficient (I) real Mighty variance) calculation of the variance) relative error /% can be seen from Table 1, data processing, the average relative error smaller model has a high accuracy. (2) is associated correlation test the correlation between variables, response accuracy of the model. Correlation r ==. . minq (i) +0.5 maxq (i) one. After q () +0.5 maxq () obtained r = O. 74346> 0.6, consistent with accuracy. (3) the posterior standard deviation of difference between test ① than c_ =,[link widoczny dla zalogowanych], / o31409, the smaller the better. @ Max (Iq (k)-q-[k-SI) = 0.016-0.010--0. OO6 <0.6745S ~ - 0.075453. 【8】 compared to the literature, calculated the average absolute error, mean relative error is reduced, which improves the accuracy of the model. 5 Conclusion In this paper, the improved GM (1,1) model has been improved not only in theory, but also reduce errors and improve accuracy. Matlab model solution through the establishment of procedures to facilitate researchers repeated mechanical calculations to obtain the relevant conclusions. . References: [1] LIU Si-feng. Grey System Theory and Development [J]. Nanjing University of Aeronautics and Astronautics, 2004. 36 (2) :267-271. [2] Deng Julong. Grey Control System [M]. Wuhan: Huazhong University Press, 1993. [3] SunJi-hu. Forecastingmodelofcoalrequirementquantitybasedongreysystemtheory [J]. JournalofChinaUmvemi ~ ofMining & Technology, 2001 (2) :192-195. [4] Meng Guangwu. Grey system theory [M]. Shandong: Shandong Science and Technology Press. 1994. [5] Li Zi Army. 1992-2001 Application of Grey System Research [J]. Systems Engineering, 2003,21 (5) :8-12. [6] Li Cuifeng. Theory and Application of gray system modeling [D]. Zhejiang: Zhejiang University of Commerce and Industry, 2006. [7] Ma Ping. Grey System GM (1,1) model for improvement and gray statistical model [D]. Jilin: Jilin University. 2007. [8] Ma Gang, Rui sickness. Integral gray GM (1,1) model of crack propagation of mechanical parts of [J]. Mechanical design and manufacturing, 2005 (11) :157-158. About the author: Peng Liping (1987 a), Jiangyin, Jiangsu people in the undergraduate, China University of Mining Electrical and Mechanical Engineering Machine Design and Automation, accepted papers 2, E-mail: plpbeekham @ 163. eom. (1) the absolute residual test Received Date :2009-05-26CST device performance characteristics of belt conveyor are controlled hydraulic starter speed control device, CST device, transmission fluid viscosity, frequency control devices and AC motor soft start devices are several. One, CST is a new type of electromechanical device integration soft-start device. Recently, Shandong University of Technology and Yanzhou Mining (Group) Company Nantun coal mine based on the use of its technical performance characteristics of practice were analyzed. CST device main advantages are: to reduce the belt tension, motor power, reducing the initial investment; balance accuracy of ± 2%, reaction time 5-100ms. To achieve a smooth power; protection function; transmission power up to 99%; lower conveyor belt safety factor requirements, and safety remain unchanged; clutch for the laminar flow between segments. Adhesion force and the clutch system of a linear relationship between spacing, adjustable belt speed of 10% to 99%, can accurately control the conveyor operation. Its main disadvantages are: speed control system with the gear into one. Large in size and inconvenience of installation; control system complexity, maintenance is relatively large; configuration high-speed shaft and brakes more difficult backstop; expensive to import spare parts. In addition, frequent use of CST in the control box are all the buttons do not work, lubrication pressure able to come up, reset button does not work, cooling the pressure able to come up, does not display the output shaft speed and high temperature failure. \ More articles related to topics：
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