Flutter-signal double-closed-loop adaptive proportional valve amplifier algorithm

Abstract

The invention discloses a flutter-signal double-closed-loop adaptive proportional pump amplifier algorithm. Through a flutter intelligent algorithm, a flutter extraction algorithm unit, a filter, a valve position intelligence algorithm, a valve position sampling filtering module, a valve position acquisition module and a flutter superposition algorithm, control to flutter of a proportion electromagnet and displacement double closed loops (containing a current small closed loop) is realized, and a displacement superposition flutter improvement hysteresis loop phenomenon method and a integration separating and resistance integral saturation algorithm are provided. Problems that a hysteresis loop influences a proportioning valve dynamic response characteristic, integration saturation causes that errors are continuously accumulated and system stability is continuously decreased are solved. By using the algorithm of the invention, control precision, control stability and an anti-interference capability of a controller can be effectively increased. Therefore, the algorithm possesses high practicality and a great application value.

Description

technical field [0001] The invention belongs to the technical field of hydraulic control, and in particular relates to a flutter signal double-closed-loop self-adaptive proportional valve amplifier algorithm. Background technique [0002] With the rapid development of the mechanical equipment manufacturing industry, higher and higher requirements are put forward for the flow, precision and response speed of hydraulic valves, and proportional valves are developed accordingly. Conventional proportional valves are generally open-loop control without closed-loop feedback signal, or closed-loop control system with single feedback, with low performance level, unstable quality and poor reliability. At the same time, the open-loop control system does not have a real-time and efficient closed-loop position control algorithm, and cannot monitor the displacement of the spool in real time. It is difficult to effectively eliminate the influence of the spool cover on the flow characterist...

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Problems solved by technology

[0004] Conventional feedback control systems have a certain ability to suppress the changes in the internal characteristics of the system and the influence of external disturbances. However, since the controller parameters are fixed, when the internal characteristics of the system change or the external disturbances vary greatly, the performance of the system will be affected. Often drops sharply, even unstable

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