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1. 发明申请

WO1997022914A1 METHOD OF OUTPUT CORRECTION FOR CONTROL APPARATUS, THE CONTROL APPARATUS, AND HYDRAULIC PUMP CONTROL APPARATUS 审中-公开
标题翻译：控制装置输出校正方法，控制装置和液压泵控制装置
公开(公告)号：WO1997022914A1
公开(公告)日：1997-06-26
申请号：PCT/JP1996002517
申请日：1996-09-05
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , KOWATARI, Youichi , HIRATA, Toichi , TAKEGAHARA, Hidefumi , TOYOOKA, Tsukasa , ISHIKAWA, Kouji , SUGIYAMA, Genroku , YOSHINAGA, Shigehiro
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： G05B11/36
CPC分类号： G05B24/02 , E02F9/2025 , E02F9/2235 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F04B49/065 , F04B2201/12041 , F04B2203/0201 , F04B2205/062 , G05B11/36 , G05B13/0265
摘要： When a mode signal Sm of a mode switch (13) is ON, an arithmetic unit (12a) of a controller (12) executes learning control in which a driving current (I) corresponding to a predetermined target pump rotation theta 0 is supplied to a proportional solenoid valve (3) to determine the difference between the target pump rotation theta 0 and actual pump rotation theta and the difference is stored as a corrective value DELTA theta 0 in an EEPROM of a memory unit (12b). When the mode signal Sm of the mode switch (13) is OFF, the arithmetic unit executes normal control in which the corrective value DELTA theta 0 stored in the memory unit (12b) is added to the target pump rotation theta 0 and a driving current (I) corresponding to this corrected target pump rotation theta 0 is supplied to the proportional solenoid valve (3). Therefore, even when any variance exists in the input/output characteristics of a regulator as displacement control means (control objet) of a hydraulic pump and the proportional solenoid valve, variance of actual pump rotation as the output of the control object can be reduced.
摘要翻译：当模式开关（13）的模式信号Sm为ON时，控制器（12）的运算单元（12a）执行学习控制，其中对应于预定目标泵旋转θ0的驱动电流（I）被提供给用于确定目标泵旋转θ0和实际泵旋转θ之间的差的比例电磁阀（3），并且差值作为校正值DELTAθ0存储在存储器单元（12b）的EEPROM中。当模式开关（13）的模式信号Sm为OFF时，运算单元执行正常控制，其中将存储在存储单元（12b）中的校正值DELTAθ0添加到目标泵旋转θ0和驱动电流对应于该校正的目标泵旋转θ0的（I）被提供给比例电磁阀（3）。因此，即使在作为液压泵和比例电磁阀的位移控制装置（控制对象）的调节器的输入/输出特性中存在任何差异的情况下，也可以减少作为控制对象的输出的实际泵旋转的变化。

2. 发明申请

WO1995015441A1 HYDRAULIC PUMP CONTROLLER 审中-公开
标题翻译：液压泵控制器
公开(公告)号：WO1995015441A1
公开(公告)日：1995-06-08
申请号：PCT/JP1994002008
申请日：1994-11-30
申请人： HITACHI CONSTRUCTION MACHINERY CO. LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , WATANABE, Hiroshi , YOSHINAGA, Shigehiro
发明人： HITACHI CONSTRUCTION MACHINERY CO. LTD.
IPC分类号： F15B11/00
CPC分类号： E02F9/2235 , E02F9/2282 , E02F9/2285 , E02F9/2296
摘要： A controller (24) is provided with function generators (151 and 152). The generator (151) has such a characteristic that a first target tilt amount theta N increases from a minimum value to a maximum value as the detected value PN of a pressure sensor (21) for negative control pressure decreases; the generator (152) has such a characteristic that a second target tilt amount theta B increases from a prescribed minimum value to the same maximum value as the detected value PB of the manipulated variable (pilot pressure) for driving a boom cylinder increases. The controller (24) selects the smaller one out of the two target tilt amounts and drives a proportional solenoid valve (25) based on the smaller value. Therefore, undesired speed increase of such a specific hydraulic actuator as a swinging motor (9), etc., other than boom cylinders which occurs at the time of controlling the tilt amount in accordance with a negative control pressure can be suppressed.
摘要翻译：控制器（24）设置有功能发生器（151和152）。发电机（151）具有这样的特征：随着负压控制压力的压力传感器（21）的检测值PN减小，第一目标倾斜量θN从最小值增加到最大值; 发电机152具有使第二目标倾斜量θB从规定的最小值增加到与用于驱动动臂缸的驾驶操作量（先导压力）的检测值PB增大的相同的最大值的特性。控制器（24）选择两个目标倾斜量中的较小的一个，并且基于较小的值驱动比例电磁阀（25）。因此，可以抑制在根据负控制压力控制倾斜量时发生的除了动臂缸之外的诸如摆动马达（9）等的特定液压致动器的不期望的速度增加。

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