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Output feedback control method for asymmetric servo cylinder positional servo system

A single-rod hydraulic cylinder, servo system technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of contamination of speed and acceleration signals, deterioration of performance, and full-state feedback controller

Active Publication Date: 2015-05-20
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In addition, severe measurement noise often contaminates the measured velocity and acceleration signals, deteriorating the performance of full state feedback controllers implementing

Method used

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  • Output feedback control method for asymmetric servo cylinder positional servo system
  • Output feedback control method for asymmetric servo cylinder positional servo system
  • Output feedback control method for asymmetric servo cylinder positional servo system

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Embodiment Construction

[0089] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0090] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those concepts and embodiments described in more detail below, can be implemented in any of a number of ways, which should be the concepts and embodiments disclosed by the present invention and not Not limited to any implementation. In addition, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.

[0091] The following describes this embodiment in conjunction wit...

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Abstract

The invention provides an output feedback control method for an asymmetric servo cylinder positional servo system. The method includes the steps: step one, establishing an asymmetric servo cylinder positional servo system model; step two, on the basis of the established servo system model, designing a high-precision asymmetric servo cylinder controller based on an extended state observer; step three, adjusting control law parameters to enable the system to meet control performance indexes. The output feedback control method for the asymmetric servo cylinder positional servo system has the advantages that aiming at characteristics of a valve-controlled asymmetric servo cylinder positional servo system, the valve-controlled asymmetric servo cylinder positional servo system model is established, the high-precision asymmetric servo cylinder controller based on the extended state observer is designed, and consequently system unknown states and unmodeled matching interference can be estimated and compensated in real time, and the problems of matching interference and unknown states of the valve-controlled asymmetric servo cylinder positional servo system can be effectively solved. In addition, design of the controller is simplified, and simulation results show effectiveness of the method.

Description

technical field [0001] The invention relates to an electro-hydraulic control method, in particular to an output feedback control method of a single-rod hydraulic cylinder position servo system. Background technique [0002] The electro-hydraulic servo system has been widely used in aerospace, aviation, navigation, weapons, mining, metallurgy and civil use due to its advantages of high response, high precision, high power, high system rigidity and strong anti-interference ability. Compared with double-rod hydraulic cylinders, single-rod hydraulic cylinders have the advantages of small working space and simple structure, and are widely used in hydraulic systems, especially for applications with limited space and high control performance requirements. However, the single-rod hydraulic cylinder system has serious nonlinear problems, modeling uncertainties and many disadvantages. For example, when the symmetrical valve controls the single-out rod non-pairing hydraulic cylinder e...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 姚建勇徐张宝杨贵超董振乐邓文翔
Owner NANJING UNIV OF SCI & TECH
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