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International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 –
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International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 –
6340(Print), ISSN 0976 – 6359(Online) Volume 3, Issue 2, May-August (2012), © IAEME 133 For a zero –order Sugeno model, The output level Z is a constant (a=b=0). The output level Zi of each rule is weighted by the firing strength Wi of the rule. For example, for an AND rule with Input 1=x and Input 2=y the firing strength is Wi= and method [F 1 (x), F 2 (y)] Where F 1 and F 2 are the membership functions for the input 1 and 2, the final output of the system is the weighted average of all rule outputs, computed as shown by equation stated below and the Sugeno rule operates as shown in Figure 3 Final Output = ( ) / ( ) Fig.3 Sugeno-Fuzzy Output Rule Due to linear dependence of each rule on the input variables of the system, the Sugeno method is ideal for acting as an interpolating supervisor of multiple linear controllers that are to be applied, respectively, to different operating conditions of a dynamic non- linear system. A Sugeno fuzzy inference system is extremely well suited to the task of smoothly interpolating the linear gains that would be applied across the input space, it is a natural and efficient gain scheduler. A Sugeno system is well suited for modeling non- linear systems by interpolating between multiple linear models [10]. The plot of membership functions and the input-output variables fed into the Fuzzy Inference System [FIS] is shown in Figure 4, where L,M and H denotes Low, Medium and High respectively. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online) Volume 3, Issue 2, May-August (2012), © IAEME 134 Download 269.83 Kb. Do'stlaringiz bilan baham: |
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