Method for regulating control parameters of electrohydraulic linear velocity servo system
A technology of servo system and adjustment method, which is applied in the field of electro-hydraulic servo system, can solve problems such as time-consuming and labor-intensive debugging of electro-hydraulic linear speed servo system, blind adjustment of servo controller control parameters, and difficulty in meeting engineering requirements for linear speed servo performance. Improve static and dynamic performance, reduce blindness, and achieve high dynamic tracking accuracy
Inactive Publication Date: 2012-01-25
JIANGSU UNIV OF SCI & TECH
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This results in blind adjustment of the control parameters of the servo controller, time-consuming and laborious debugging of the electro-hydraulic linear velocity servo system, and the linear velocity servo performance is difficult to meet engineering requirements
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[0030] In order to deepen the understanding of the present invention, the specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. The embodiments are only used to explain the present invention, and do not constitute a limitation to the protection scope of the present invention.
[0031] attached figure 1 It is a block diagram of the electro-hydraulic linear velocity servo system of the present invention. The electro-hydraulic linear velocity servo system is composed of a linear velocity command signal generator 110, a servo controller 120, a power amplifier 130, a servo object 140, a linear velocity detection sensor 150 and a hydraulic source 160; the servo controller is composed of a comparator 121, Intelligent integrator 122, integral coefficient K i Multiplier 123, subtractor 124 and feedback coefficient K f Multiplier 125 is formed, described comparator 121, intelligent integrator 122, integra...
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The invention discloses a method for regulating control parameters of an electrohydraulic linear velocity servo system. The electrohydraulic linear velocity servo system on which the regulating method is based consists of a linear velocity command signal generator, a servo controller, a servo object and a linear velocity detection sensor. The method for regulating the control parameters comprise the following steps of: firstly, recognizing an equivalent viscous damping coefficient and an equivalent mass of the servo object according to a time value which is 0.632 times of the steady-state value; secondly, dividing an input voltage corresponding to the maximum output current of an electrohydraulic servo valve by the maximum of the linear velocity command signal, squaring an obtained quotient, multiplying by 2.5 and dividing by the equivalent mass of the servo object to obtain an integration coefficient of the servo controller; and finally, multiplying the integration coefficient of servo controller by the equivalent mass, performing extraction of square root, multiplying by 2 and deducting the equivalent viscous damping coefficient from an obtained product to obtain a feedback coefficient of the servo controller. The regulation of the control parameters has a definite object, so that the static and dynamic performances of the servo system are improved.
Description
Technical field: [0001] The invention relates to an electro-hydraulic servo system, in particular to a method for adjusting control parameters of a servo controller in a linear velocity servo system of a valve-controlled hydraulic cylinder. Background technique: [0002] In the electro-hydraulic servo system, the electro-hydraulic linear speed servo is often encountered in some mechanical equipment, such as the expansion and contraction of the mechanical arm, the feed movement of the processing equipment, and the transmission of the workpiece in the automated production line. In the electro-hydraulic linear speed servo system, the variable of the electro-hydraulic servo is the linear speed of the mechanical load movement. In order to obtain excellent linear velocity servo performance, the electrohydraulic linear velocity servo system must adopt feedback control. That is to say, the linear velocity of the moving parts in the mechanical equipment must be fed back to the input...
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IPC IPC(8): F15B21/02G05B13/04
Inventor 曾文火朱鹏程
Owner JIANGSU UNIV OF SCI & TECH