| 摘要 |
PURPOSE:To carry out the optimum speed control corresponding to the road surface state by controlling the road surface state by fuzzy-estimating the dynamic frictional coefficient between the road surface and a tire on the basis of the state of the road surface on which an automobile travels and the traveling speed and controlling the speed of the automobile according to the result of the estimation. CONSTITUTION:In the control of the speed of an automobile, the state of a road surface on which the automobile travels and the traveling speed of the automobile are detected by the means 2 and 6. Then, each detection signal is inputted into a fuzzy controller 8, and the speed of the automobile is fuzzy- controlled according to a plurality of fuzzy rules having the detected road surface state and the traveling speed as the former variables and having the dynamic frictional coefficient between the road surface and a tire as the posterior variables and the membership function of each above-described variable which is allotted for a prescribed fuzzy label. Then, a driving mechanism 12 such as a throttle valve in an engine is controlled by a speed control circuit 10 according to the dynamic frictional coefficient outputted from the fuzzy controller.
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