Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Construction or agricultural-type vehicle
Patent
1997-06-23
1999-10-19
Chin, Gary
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Construction or agricultural-type vehicle
414699, 37414, E02F 343
Patent
active
059681047
ABSTRACT:
An area where a front device (1A) is allowed to move is set beforehand and the operation of the front device is controlled so that the front device will not go out of the set area. For this control process, an arm cylinder speed calculating portion (9d) of a control unit (9) estimates an arm cylinder speed for use in control by taking the sum of a low-frequency component of an arm cylinder speed which is derived through coordinate transformation and differentiation of an arm rotational angle detected by an angle sensor (8b), and a high-frequency component of an arm cylinder speed which is derived from a command value applied from a control lever unit (14b) to a flow control valve (15b) for an arm and a flow rate characteristic of the flow control valve (15b). The control unit controls the operation of the front device with the estimated operating speed. The operation of the front device is thereby controlled smoothly and accurately regardless of change in any parameters, such as load and fluid temperature, affecting the flow rate characteristic of the flow control valve.
REFERENCES:
patent: 4260941 (1981-04-01), Engelberger et al.
patent: 4894598 (1990-01-01), Daggett
patent: 5701691 (1997-12-01), Watanabe et al.
patent: 5735065 (1998-04-01), Yamagata et al.
patent: 5768810 (1998-06-01), Ahn
patent: 5835874 (1998-11-01), Hirata et al.
patent: 5845223 (1998-12-01), Song
patent: 5860480 (1999-01-01), Jayaraman et al.
Egawa Eiji
Fujishima Kazuo
Haga Masakazu
Watanabe Hiroshi
Chin Gary
Hitachi Construction Machinery Co. Ltd.
LandOfFree
Front control system for construction machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Front control system for construction machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Front control system for construction machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2049545