Microsoft Word 14 Material Removal
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- 4. RESULTS AND DISCUSSION
- International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online) Volume 3, Issue 2, May-August (2012), © IAEME
- 5. CONCLUSION
Fig.4 Membership function of Sugeno-Fuzzy Upon developing the membership function, precise rules have been fed into the system relating the FIS input-output variables. Each of these rules plays an important role in generating the fuzzy logic controller model and the accuracy of the numerical output. Upon the rules determination, the fuzzy logic controller will simulate the FIS variables with respective rules and modeling of the controller toolbox will take place. The model controller toolbox to the system is shown in the Figure 5. Fig.5 Controller tool box for each rule. 4. RESULTS AND DISCUSSION Fig. 6 and 7 are the Sugeno-Fuzzy based surface model showing an excellent relationship between the two sets of input variables: speed and feed rate and drill size. Fig.6 with the output material removal rate plotted against speed and feed rate and in the Fig.7 the output material removal rate is plotted against speed and drill size. The International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online) Volume 3, Issue 2, May-August (2012), © IAEME 135 inference drawn is that for medium feed rate, drill size and spindle speed the MRR rate is higher for carbon silicon carbide composite. Fig.6 Sugeno Fuzzy model (spindle speed & feed rate) Fig.7 Sugeno Fuzzy model (spindle speed & drill size) Fig. 8 Sugeno Fuzzy model(spindle speed and drill size) International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online) Volume 3, Issue 2, May-August (2012), © IAEME 136 Table 3 Output Result Table Experiment 1 2 3 Actual MRR 0.0222 0.0529 0.0482 Predicted MRR(BPN) 0.0282 0.0205 0.0206 Error(BPN) -0.0065 -0.0323 -0.0276 Fuzzy MRR 0.0010 0.0025 0.0206 Error(fuzzy) 0.0212 0.0504 0.0276 From the numerical data, it is clear that the BPN system has produced closer output as compared to Sugeno-fuzzy system. It has been studied that Fuzzy has the ability of predicting the future (forecasting) based on the membership function of the input and the output variables, limits and rules fed. Although its values are not the best, but it also matches closely to the actual. 5. CONCLUSION • BPN has shown the capability of generalization and prediction of material removal rate in drilling within the range of experimental data. • The maximum deviation observed and estimated by BPN is minimal. • The present work can be extended with different process parameters, material thickness and type to test the ability of the expert systems in prediction of the output and these findings can then be applied to indirect tool condition monitoring in unmanned manufacturing system. • The predicted values of the ANN output can be further improved by increasing the weights of the experiments. Download 269.83 Kb. Do'stlaringiz bilan baham: |
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