2. The output parameter estimation apparatus of claim 1, wherein the fuzzy operation means obtains the fitness degree of the input data set in each of the determined field and the adjacent field based on membership functions corresponding to each of the n input parameters, and obtains a centroid for the input data set according to the obtained fitness degrees, based on membership functions that show the determined field and the adjacent field.
2. The output parameter estimation apparatus of claim 1, wherein the fuzzy operation means obtains the fitness degree of the input data set in each of the determined field and the adjacent field based on membership functions corresponding to each of the n input parameters, and obtains a centroid for the input data set according to the obtained fitness degrees, based on membership functions that show the determined field and the adjacent field. 3. The output parameter estimation apparatus of claim 2, wherein the fuzzy operation means obtains the centroid using a min-max calculation method.