This paper deals with a control strategy for a rotary crane. On operating a crane, it is necessary to transfer a load without swing in a time as short as possible. We constitute a automatic control system to automate the operation of rotary crane.The control variables of rotary crane system are a rotary velocity and an angle of elevation. In order to realize the time optimal control system with no oscillation of a load at the desirable position, and to prevent the effect of disturbance, fuzzy theory are applied to the system. This paper presents the result of control simulation. Also, it is examined that this control method is efficient for practical use.control methods of rotary crane by using fuzzy theory as well as by skilled professional operators.

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