Automatic Level Control of Bulldozer Blade Based on Fuzzy Theory

Ground leveling by bulldozer blade should be automatically controlled since the operation is an exhausting work for the bulldozer operator. In this paper, fuzzy control is used for the blade operation in the ground leveling. A series of tests using model bulldozing vehicle are carried out to check the effects of membership functions in the fuzzy control and the vehicle speed. Moreover some tests based on proportional action control are conducted to compare with the results based on proportional action control are conducted to compare with the results of fuzzy control tests. As a result, to adjust the membership functions was effective in improving the results of fuzzy control tests, and a distinction between the properties of the two control methods was made clear.