| 摘要 |
An automatically operated shovel has a shovel and an automatic operation controller arranged on the shovel to store by a teaching operation plural working positions of the shovel, which comprises at least a digging position, and also to cause by a reproduction operation the shovel to repeatedly perform a series of reproduction operations on the basis of the stored plural working positions. The automatic operation controller is provided with servo control means for outputting, as a servo control quantity, a sum of a compliance control quantity and a pressure control quantity. The compliance control quantity is obtained by multiplying with a stiffness gain a difference between a target position of each operational element of the shovel, the target position comprising angle information indicative of an operational target of the operational element, and a current position of the operational element, the current position comprising current angle information on the operational element. The pressure control quantity is obtained by multiplying with a pressure gain a difference between a target pressure, which serves as a target when the operational element of the shovel is in contact with an object under digging, and a current pressure of the operational element. The stiffness gain and the pressure gain are settable at varied values depending on the working positions.
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