A self-learning control method and device for a hydraulic system
A control method and hydraulic system technology, which is applied in the field of hydraulic control, can solve the problems that the current-displacement relationship is not completely the same, the current-displacement relationship cannot be accurately obtained, and the performance of the hydraulic system is affected, and some impact phenomena can be eliminated. , Improve the efficiency of self-learning, improve the effect of operating performance
Active Publication Date: 2022-06-24
WEICHAI POWER CO LTD +1
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Problems solved by technology
However, due to the existence of errors such as installation and machining, the current-displacement relationship between pumps is not exactly the same
[0003] There are two pumps in an excavator. If the same current-displacement curve is used for control, but the actual current-displacement curves of the two pumps are different, it will affect the performance of the excavator.
For example, the running deviation caused by the different walking speeds of the two sides of the track, or the action delay caused by the small control current, or the engine stalling due to the excessive control current, etc.
[0004] However, the current-displacement relationship of the pump in the hydraulic system cannot be accurately obtained, which affects the performance of the hydraulic system
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[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following will refer to the accompanying drawings in the embodiments of the present invention, and describe the technical solutions of the present invention clearly and completely through the implementation manner. Obviously, the described embodiments are the present invention. Some examples, but not all examples. Based on the basic concepts disclosed and suggested by the embodiments of the present invention, all other embodiments obtained by those skilled in the art fall within the protection scope of the present invention.
[0032] refer to figure 1 As shown, it is a schematic diagram of a self-learning control method of a hydraulic system provided by an embodiment of the present invention. The hydraulic system provided in this embodiment includes an engine and a first hydraulic pump, and the self-learning control method can be implemented by a self-learning cont...
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The embodiment of the present invention discloses a self-learning control method and device for a hydraulic system. The hydraulic system includes an engine and a first hydraulic pump. The self-learning control method includes: the first node current learning stage, in the first node current learning stage, Increase the control current of the first hydraulic pump to the i-th current, obtain the i-th pump average pressure of the first hydraulic pump within the first time length, and the i-th current is in the first node current interval; if the i-th pump of the first hydraulic pump The difference between the average pressure of the pump and the target pressure threshold corresponding to the first node current interval meets the target condition, determine the i-th current as the target current in the first node current interval, form a pump current-displacement curve, and then end the first node current learning stage. In the embodiment of the present invention, the self-learning of the current-displacement curve of the hydraulic pump is quickly and intelligently carried out when the equipment is off-line, so as to obtain the accurate current-displacement curve of each pump, so as to improve system adaptability and system operation performance.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of hydraulic control, and in particular, to a self-learning control method and device for a hydraulic system. Background technique [0002] In the positive flow hydraulic system of the excavator, the pump is controlled by electric proportional control, that is, the actual displacement of the pump is proportional to the control current. The larger the displacement, the larger the required control current. However, due to the existence of errors such as installation and machining, the current-displacement correspondence between pumps is not exactly the same. [0003] There are two pumps in an excavator. If the same current-displacement curve is used for control, but the actual current-displacement curves of the two pumps are different, it will affect the performance of the excavator. For example, the running speed of the crawler on both sides is different, or the action is delayed due to...
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IPC IPC(8): F15B21/02
CPCF15B21/02F15B2211/2053
Inventor 赵金光杜洪流张西田乔志刚
Owner WEICHAI POWER CO LTD