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Fuzzy control method for nonlinear precise forging press

A technology of fuzzy control and forging press, which is applied in the driving device of forging press, adaptive control, general control system, etc., and can solve problems such as difficult modeling

Inactive Publication Date: 2012-03-28
FOSHAN SHUNDE IND & INFORMATION TECHRES CENT
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a high-precision fuzzy control method for nonlinear precision forging presses suitable for nonlinear precision forging presses; it can effectively solve the difficulty of modeling and effective control of classical control theory on nonlinear precision forging presses problems, can achieve product processing with an accuracy of 10 μm

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  • Fuzzy control method for nonlinear precise forging press
  • Fuzzy control method for nonlinear precise forging press
  • Fuzzy control method for nonlinear precise forging press

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Embodiment Construction

[0022] Such as figure 1 As shown, the precision forging press that the present invention relates to is made of fuselage, low-speed high-torque AC servo motor, synchronous gear, ball screw, ball spline, drive slider, balance cylinder, short connecting rod, crankshaft, long connecting rod, slide Block 1 and so on. The working principle of the forging press is: the controller controls the rotation angle of the servo motor according to the time-position key point of the slider specified by the user, the motor drives the synchronous pulley, the slider is driven by the ball screw, and the end slider is driven by the booster mechanism. Movement in the vertical direction drives the mold to work. figure 2 It is the mechanism and force analysis diagram of the forging press, where point A is fixed, point C is the slider 1, and point D is connected with the screw rod. When the screw rod moves up and down, it drives the rod c to move. Since A is fixed, joint B drives the rod b movement...

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Abstract

The invention relates to the field of industry automatic control, in particular to a fuzzy control method for a nonlinear precise forging press. A control system comprises a fuzzification interface, a fuzzy reasoning machine, a knowledge base and a defuzzification interface. Input controlled variables are the displacement error e, the displacement error change rate ce and the displacement y of a slider; an output controlled variable is the rotation angle increment deltau of a motor; the displacement error e and the displacement error change rate ce, are converted into appropriate linguistic values in a domain of discourse after being fuzzified by the membership function of the fuzzification interface; fuzzy reasoning is performed on a fuzzified input variable according to a fuzzy rule through the fuzzy reasoning machine to obtain a fuzzy output variable; and weighted average defuzzification is performed on the fuzzy output variable to obtain the actual output rotation angle increment deltau of the motor. The output of the control system provided by the invention is capable of tracking input better, is capable of realizing product processing of which the precision is 10mu m when being applied to the nonlinear precise forging press, and can be widely applied to various nonlinear precise forging presses.

Description

technical field [0001] The invention relates to the field of industrial automatic control, in particular to a fuzzy control method for a nonlinear precision forging press. Background technique [0002] Forging is one of the basic processes of the machinery manufacturing industry, an important material basis and technical basis for the development and production of various mechanical equipment, and an indispensable blank for the manufacture of key parts and important parts of mechanical products. Its application scope involves various fields of national economy, national defense industry and social life. In industrial sectors such as automobiles, railway rolling stock, electric power, petrochemicals, coal, metallurgy, aviation, aerospace, ships, weapons and machinery, vital load-bearing components are made of forgings. [0003] At present, the most widely used control algorithm of domestic forging machinery is proportional, integral and differential control, referred to as P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J9/20G05B13/04
Inventor 陈冰冰黄伟权
Owner FOSHAN SHUNDE IND & INFORMATION TECHRES CENT
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