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A platform for research: civil engineering, architecture and urbanism
UTILITY VEHICLE, AND CONTROL METHOD FOR UTILITY VEHICLE
This utility vehicle is equipped with a boom, an arm, a bucket, an arm cylinder, a direction control valve, a calculation unit, and a speed determination unit. The arm cylinder drives the arm. The direction control valve has a movable spool, and the movement of the spool supplies hydraulic oil to the arm cylinder, thereby operating the arm cylinder. The calculation unit calculates the estimated speed of the arm cylinder on the basis of the correlation between the displacement of the spool of the direction control valve that tracks the control variable of the arm operation lever, and the speed of the arm cylinder. The speed determination unit determines the target speed of the boom on the basis of the estimated speed of the arm cylinder. If the control variable of the arm operation lever is less than a predetermined value, the calculation unit calculates, as the estimated speed of the arm cylinder, a speed that is greater than the speed of the arm cylinder according to the correlation between the speed of the arm cylinder and the displacement of the spool of the direction control valve according to the control variable of the arm operation lever.
UTILITY VEHICLE, AND CONTROL METHOD FOR UTILITY VEHICLE
This utility vehicle is equipped with a boom, an arm, a bucket, an arm cylinder, a direction control valve, a calculation unit, and a speed determination unit. The arm cylinder drives the arm. The direction control valve has a movable spool, and the movement of the spool supplies hydraulic oil to the arm cylinder, thereby operating the arm cylinder. The calculation unit calculates the estimated speed of the arm cylinder on the basis of the correlation between the displacement of the spool of the direction control valve that tracks the control variable of the arm operation lever, and the speed of the arm cylinder. The speed determination unit determines the target speed of the boom on the basis of the estimated speed of the arm cylinder. If the control variable of the arm operation lever is less than a predetermined value, the calculation unit calculates, as the estimated speed of the arm cylinder, a speed that is greater than the speed of the arm cylinder according to the correlation between the speed of the arm cylinder and the displacement of the spool of the direction control valve according to the control variable of the arm operation lever.
UTILITY VEHICLE, AND CONTROL METHOD FOR UTILITY VEHICLE
TAKAURA TAKESHI (author) / FUJII YUTO (author) / KAMI YOSHIKI (author)
2015-05-13
Patent
Electronic Resource
English
IPC:
E02F
Baggern
,
DREDGING