scholarly journals APPLICATION OF ADAPTIVE CONTROLLER TO WATER HYDRAULIC SERVO CYLINDER

2005 ◽  
Vol 2005 (6) ◽  
pp. 432-436 ◽  
Author(s):  
Hidekazu TAKAHASHI ◽  
Kazuhisa ITO ◽  
Shigeru IKEO
Keyword(s):  
Adaptive Controller ◽  
Hydraulic Servo ◽  
Water Hydraulic

Development of the Small Flow Rate Water Hydraulic Servo Valve

2010 ◽  
Vol 22 (3) ◽  
pp. 333-340 ◽  
Author(s):  
Toshiya Watanabe ◽  
◽  
Tomokazu Inayama ◽  
Takeo Oomichi
Keyword(s):  
Flow Rate ◽  
Servo Valve ◽  
Test And Evaluation ◽  
Small Flow Rate ◽  
Hydraulic Servo ◽  
Small Flow ◽  
Hydraulic Manipulator ◽  
Water Hydraulic ◽  
Leakage Characteristics ◽  
Small Capacity

A small capacity servo valve was developed for a small size water hydraulic manipulator, focusing the saving energy. The new servo valve optimizes the machines small flow rate use, makes the stroke longer for wideband use, reduces leakage and makes control easier. The test and evaluation of the servo valve was conducted by examining flow rate characteristics, leakage characteristics and responsibility. The flow rate and leak rate of the servo valve shows to be the same as the oil hydraulic servo valve, while the step and frequency response show good controllability for the water hydraulic manipulator.

1202 Application of Simple Adaptive Control to a Water Hydraulic Servo Cylinder System

2011 ◽  
Vol 2011.49 (0) ◽  
pp. 355-356
Author(s):  
Tsuyoshi YAMADA ◽  
Kazuhisa ITO ◽  
Shigeru IKEO ◽  
Masaharu NISHIMURA ◽  
Nobutaka WADA
Keyword(s):  
Adaptive Control ◽  
Hydraulic Servo ◽  
Water Hydraulic

scholarly journals AN ELECTRO-HYDRAULIC SERVO MECHANISM WITH AN ANALOG ADAPTIVE CONTROLLER

1989 ◽  
Vol 1989 (1) ◽  
pp. 205-212
Author(s):  
Kazushi Sanada ◽  
Yoshiyasu Hagiwara ◽  
Ato Kitagawa
Keyword(s):  
Adaptive Controller ◽  
Servo Mechanism ◽  
Hydraulic Servo

Improvement of durability of water hydraulic servo valve

2018 ◽  
Vol 2018 (0) ◽  
pp. 2P1-B03
Author(s):  
Koki Sakakibara ◽  
Kazushi Shibata ◽  
Shunya Suzuki ◽  
Satoshi Ashizawa ◽  
Takeo Oomichi
Keyword(s):  
Servo Valve ◽  
Hydraulic Servo ◽  
Water Hydraulic

Lyapunov Based Adaptive Control Method for Hydraulic Servo Drive

2016 ◽  
Author(s):  
Hamid Roozbahani ◽  
Konstantin Frumkin ◽  
Heikki Handroos
Keyword(s):  
Adaptive Control ◽  
Control Algorithm ◽  
Environmental Changes ◽  
Control Method ◽  
Servo System ◽  
Adaptive Controller ◽  
Servo Drive ◽  
Hydraulic Servo ◽  
Hydraulic Servo System ◽  
Adaptive Control Algorithm

Adaptive control systems are one of the most significant research directions of modern control theory. It is well known that every mechanical appliance’s behavior noticeably depends on environmental changes, functioning-mode parameter changes and changes in technical characteristics of internal functional devices. An adaptive controller involved in control process allows reducing an influence of such changes. In spite of this such type of control methods is applied seldom due to specifics of a controller designing. The work presented in this paper shows the design process of the adaptive controller built by Lyapunov’s function method for a hydraulic servo system. The modeling of the hydraulic servo system were conducting with MATLAB® software including Simulink® and Symbolic Math Toolbox™. In this study, the Jacobi matrix linearization of the object’s mathematical model and derivation of the suitable reference models based on Newton’s characteristic polynomial were applied. In addition, an intelligent adaptive control algorithm and system model including its nonlinearities was developed to solve Lyapunov’s equation. Developed algorithm works properly and considered plant is met requirement of functioning with. The results shows that the developed adaptive control algorithm increases system performance in use devices significantly and might be used for correction of system’s behavior and dynamics.

Theoretical and Simulative Study on Hydraulic Bridge of Water Hydraulic Servo Valve

2011 ◽  
Vol 181-182 ◽  
pp. 305-309 ◽  
Author(s):  
Xin Hua Wang ◽  
Jia Qing Chang ◽  
Shu Wen Sun ◽  
Gang Zheng
Keyword(s):  
Fluid Dynamics ◽  
Steady State ◽  
Dynamics Simulation ◽  
Computational Fluid Dynamics Simulation ◽  
Servo Valve ◽  
Pressure Distributions ◽  
Hydraulic Servo ◽  
Water Hydraulic ◽  
The Relationship ◽  
Annular Clearance

An analysis has been conducted on the hydraulic bridge of the water hydraulic servo valve with annular clearance between sleeve and spool land as its first hydraulic resistance. Through some formula deductions, the simplified hydraulic bridge is drawn and the relationship between flapper displacement and differential pressure of spool ends, which is demonstrated by the subsequent simulation works, is extracted. By the CFD(computational fluid dynamics) simulation, firstly, the pressure distributions of the flapper face and the fore end face of the nozzle are obtained. Results show that the flapper has an annular area where the existing pressure is negative. Secondly, the relationship between flapper displacement and flow force acting on flapper is also acquired, which is much beneficial to the steady-state and dynamic analysis of the water hydraulic servo valve.

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