Dynamic Characteristics Research of Self-Swinging Control System with Valve-Controlled Cylinder Device for Liquamatic Fire Water Monitor

2010 ◽  
Vol 44-47 ◽  
pp. 1427-1431
Author(s):  
Guo Liang Hu ◽  
Zhi Gang Gao
Keyword(s):  
Control System ◽  
Simulation Analysis ◽  
Water Pressure ◽  
Water Channel ◽  
Hydraulic Cylinder ◽  
The Self ◽  
Controlled System ◽  
Pressure Water ◽  
Water Hydraulic ◽  
Hydraulic Valve

In order to satisfy the flexibility requirements of the fire fighting in some particular circumstances, a self-swinging control system with valve-controlled cylinder of the liquamatic fire water monitor was designed. The self-swinging control system was composed of water hydraulic cylinder, water hydraulic valve, water channel connection plate and mechanical feedback device. This controlled system was driven by the pressure water from the monitor body. The water hydraulic cylinder drives the monitor head to swing side by side, consequently, the cover areas of the jet water from the monitor head was increased. At the same time, the modeling and simulation analysis was carried out for the self-swinging control system using the AMESim software, the simulation results show that the self-swinging control system can self-swing in a particular frequency, and the frequency is increasing with the water pressure increasing.

Two-Way Solenoid Valves in Low-Pressure Water Hydraulics

2000 ◽  
Author(s):  
Matti O. Linjama ◽  
Jyrki O. Tammisto ◽  
Kari T. Koskinen ◽  
Matti J. Vilenius
Keyword(s):  
Pressure Range ◽  
Position Control ◽  
Hydraulic Cylinder ◽  
Low Pressure ◽  
Weak Point ◽  
Flow Capacity ◽  
Water Hydraulics ◽  
Pressure Water ◽  
Small Flow ◽  
Water Hydraulic

Abstract The paper tests experimentally the suitability of inexpensive directly operated two-way solenoid valves for water hydraulic applications in the pressure range from 10 to 40 bars. Seven valves are tested and tested matters include the steady-state and dynamic characteristics as well as durability. Results show small delays and the durability of about ten million openings. The weak point of the valves is a small flow capacity but otherwise the valves are well suited for low-pressure water hydraulic applications. This is demonstrated by using them in a simple on/off position control of a water hydraulic cylinder.

High-Speed On/Off Position Control of a Low-Pressure Water Hydraulic Cylinder Drive

2002 ◽  
Author(s):  
Matti Linjama ◽  
Harri Sairiala ◽  
Kari T. Koskinen ◽  
Matti Vilenius
Keyword(s):  
High Speed ◽  
Position Control ◽  
Hydraulic Cylinder ◽  
Low Pressure ◽  
Pressure Water ◽  
Water Hydraulic

Proportional Position Control of Low-Pressure Water Hydraulic Cylinder

2002 ◽  
Author(s):  
Harri Sairiala ◽  
Matti Linjama ◽  
Kari T. Koskinen ◽  
Matti Vilenius
Keyword(s):  
Position Control ◽  
Hydraulic Cylinder ◽  
Low Pressure ◽  
Pressure Water ◽  
Water Hydraulic

Sliding mode tracking control of a low-pressure water hydraulic cylinder under non-linear friction

2002 ◽  
Vol 216 (5) ◽  
pp. 383-392 ◽  
Author(s):  
S H Cho ◽  
M Linjama ◽  
H Sairiala ◽  
K T Koskinen ◽  
M Vilenius
Keyword(s):  
Tracking Control ◽  
Position Control ◽  
Sliding Mode ◽  
Hydraulic Cylinder ◽  
Low Pressure ◽  
Non Linear ◽  
Linear Friction ◽  
Pressure Water ◽  
Water Hydraulic ◽  
Mode Tracking

This paper deals with a robust motion control of a low-pressure water hydraulic cylinder under non-linear friction. In order to ensure good tracking performance as well as to guarantee robustness, the sliding mode tracking control is utilized in combination with a non-linear friction compensator. Application of the scheme to a low-pressure water hydraulic cylinder position control has led to a significant reduction in tracking error when compared with the perfect tracking control scheme.

J113026 Modeling of water hydraulic cylinder control system with proportional valve

2012 ◽  
Vol 2012 (0) ◽  
pp. _J113026-1-_J113026-3
Author(s):  
Toshiki HATAYAMA ◽  
Sho AKAZAWA ◽  
Kenji SUZUKI ◽  
Yohichi NAKAO
Keyword(s):  
Control System ◽  
Hydraulic Cylinder ◽  
Proportional Valve ◽  
Water Hydraulic

scholarly journals PROPORTIONAL VELOCITY CONTROL OF LOW-PRESSURE WATER HYDRAULIC CYLINDER DRIVE

2002 ◽  
Vol 2002 (5-1) ◽  
pp. 181-186
Author(s):  
Harri Sairiala ◽  
Matti Linjama ◽  
Kari T. Koskinen ◽  
Matti Vilenius
Keyword(s):  
Hydraulic Cylinder ◽  
Low Pressure ◽  
Velocity Control ◽  
Pressure Water ◽  
Water Hydraulic

scholarly journals Analysis of energy absorption characteristics of corrugated top beam of anti-impact hydraulic support

2021 ◽  
Author(s):  
JUN MAO ◽  
Chenghu GUO ◽  
MIAO XIE
Keyword(s):  
Control System ◽  
Simulation Analysis ◽  
Order Term ◽  
Response Speed ◽  
Hydraulic Cylinder ◽  
Phase Lag ◽  
Mobile Platforms ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo ◽  
Uncertain Disturbance

Abstract To solve the problem that the response of the walking platform of bricklaying robot is slow and uncertain factors such as load change and friction of hydraulic cylinder affect the adjustment accuracy, an electro-hydraulic servo system with four hydraulic cylinders is designed. The system is an improved ADRC method. The available information of the whole system is fully considered, and the piston rod position deviations of the hydraulic cylinder is taken as the input of the whole controller to reduce the phase lag caused by the extended observer and improve the response speed of the control system. The position deviations of the piston rod in a cylinder is compensated by observation, and the high-order term and uncertain disturbance in the whole control system are defined as total disturbance, so the structure of the controller is simplified appropriately. Finally, MATLAB and AMESim are used for simulation analysis. The simulation results show that the improved ADRC method can significantly improve the response speed of the system and the suppression of uncertain disturbance. This research provides a theoretical basis for the research of masonry robot mobile platforms.

Flow Field Simulation Analysis of Three-Way Water Hydraulic Valve Based on Surface Micro Modelling

2014 ◽  
Vol 602-605 ◽  
pp. 197-200
Author(s):  
Chuan Li Wang ◽  
Guang Xiang Pan ◽  
Hai Shun Deng
Keyword(s):  
Flow Field ◽  
Field Distribution ◽  
Simulation Analysis ◽  
Structural Parameters ◽  
Chemical Properties ◽  
Careful Consideration ◽  
Water Medium ◽  
Technical Problems ◽  
Water Hydraulic ◽  
Hydraulic Valve

Due to special physical and chemical properties of water medium, three-way water hydraulic valve has many key technical problems that could seriouly affect the operating performance. Safety valve in three-way hydraulic valve is seen as a research object, which is aiming at studying the effect of flow field distribution with surface micro modeling in three-way hydraulic valve cavity based on FLUENT. The simulation results show that, proper surface micro modelling help to improve the three-way water hydraulic valve cavity flow field distribution, different structural parameters affecting different flow field distribution, as for micro modelling design, careful consideration of the selection of structure parameters is necessary.

Variable Frequency and Multi-Pressure Water Supply Control System Based on STM32 Processor

2014 ◽  
Vol 852 ◽  
pp. 406-411
Author(s):  
Jia Xiang Lou ◽  
Hong Fang Zhang ◽  
Ming Yu Gao ◽  
Zhi Wei He
Keyword(s):  
Control System ◽  
Water Supply ◽  
Real Time ◽  
Water Flow ◽  
Water Pressure ◽  
Variable Frequency ◽  
Motor Speed ◽  
Pressure Water ◽  
Flow Pressure ◽  
Design Requirements

In this paper, a kind of variable frequency and multi-pressure water supply control system based on STM32 processor is designed. It can adjust the water pressure dynamically, according to the changes of water flow. Therefore, it can economize the energy consumption significantly. In order to improve real-time performance, the system adopts STs STM32F407 series processor which is based on ARM® CortexTM-M4 32-bit RISC core. It is used to collect the water flow, pressure and other data in real time, and automatically adjust the output frequency to control the motor speed, according to the set pressure value, and ultimately control the flow and pressure of the water supply system. According to the test, this variable frequency and multi-pressure water supply control system based on STM32 processor can meet the design requirements.

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