Contamination modeling and Kalman prediction method of construction machinery hydraulic system

2011 ◽  
Author(s):  
Xiaoying Zeng ◽  
Yunhua Li
Keyword(s):  
Hydraulic System ◽  
Prediction Method ◽  
Construction Machinery ◽  
Kalman Prediction

scholarly journals A new process to develop a hydraulic system adapted to biodegradable hydraulic oil for construction machinery

2021 ◽  
Vol 12 (2) ◽  
pp. 56-74
Author(s):  
Satoshi OHKAWA ◽  
Sunkil YUN ◽  
Taketoshi HIBIYA ◽  
Hidekazu NISHIMURA
Keyword(s):  
Hydraulic System ◽  
Construction Machinery ◽  
Hydraulic Oil ◽  
New Process

An Adding Mass Method for Stiffly Mechanical System Simulation and Applications to Construction Machinery

2001 ◽  
Author(s):  
Etsujiro Imanishi ◽  
Satoshi Yonezawa ◽  
Naoki Sugano ◽  
Eiko Hirooka ◽  
Takahiro Kobayashi
Keyword(s):  
Mechanical System ◽  
Dynamic Simulation ◽  
Hydraulic System ◽  
Piecewise Linear ◽  
Hydraulic Systems ◽  
Practical Application ◽  
Construction Machinery ◽  
Linear Elements ◽  
Improvement Method ◽  
And Control

Abstract A characteristic improvement method for dynamic simulation of a stiff mechanical system by adding mass is presented. Hydraulic systems with check valves and control valves on construction machinery exhibit piecewise-linear characteristics for hydraulic flow rate and spool stroke. The proposed improvement method involves no time delay in determining the mass by considering both eigenvalue distortion of the system and time response. This paper shows a practical application to the boom derricking system of a rough terrain crane, and demonstrates that this method is useful for dynamic simulation of hydraulic system including stiff piecewise-linear elements.

Cavitation Erosion in the Portion of an Oil Passage Through Which Bubbles Pass

2017 ◽  
Author(s):  
Kento Kumagai ◽  
Toshiharu Kazama
Keyword(s):  
Hydraulic System ◽  
Cavitation Erosion ◽  
Dynamics Simulation ◽  
Hydraulic Systems ◽  
Computational Fluid Dynamics Simulation ◽  
Construction Machinery ◽  
Cavitation Bubbles ◽  
Experimental Apparatus ◽  
Research Findings ◽  
Pass Through

Cavitation erosion is a serious problem in the hydraulic system of construction machinery. In particular, the erosion which occurs even when cavitation bubbles only pass through oil passages, occurs at a connecting portion between the hydraulic components and piping, and the erosion causes oil leakage, which is a serious problem for hydraulic systems. However, it is difficult to predict the eroded area and to prevent the erosion because of a lack of research findings. The present study investigated erosion in the portion through which cavitation bubbles passes using a basic experimental apparatus that simulates an oil passage of hydraulic components, and by conducting a computational fluid dynamics simulation. The following results were obtained. Erosion occurs near the outlet of the oil passage, cavitation bubbles frequently disappear rapidly near the area of erosion, and the cause of bubble disappearance is the pressure distribution and amplification of the pressure wave of cavitation jets at the outlet of the oil passage. These results help explain the erosion generation mechanism and the characteristics of erosion in oil passages of hydraulic components, and can be used to design methods of reducing erosion.

Analysis of Construction Machinery Hydraulic Control System

2013 ◽  
Vol 401-403 ◽  
pp. 1590-1595 ◽  
Author(s):  
Li Zhang
Keyword(s):  
Power Control ◽  
Hydraulic System ◽  
Control Mode ◽  
Hydraulic Control ◽  
Hydraulic Power ◽  
Construction Machinery ◽  
Advantages And Disadvantages ◽  
Power And Control ◽  
And Control ◽  
Hydraulic Control System

This article analyses the use requirement of construction machinery, introduce the main features of typical construction machinery hydraulic system, derived power control modes of hydraulic system form hydraulic power form, compares the advantages and disadvantages of each power control mode, gives the optimization solutions, at last, sum up the full text of the construction machinery hydraulic power and control modes and prospect of the hydraulic system to precision control.

Study on the Network Control of Construction Machinery Control and Computer Operating System

2013 ◽  
Vol 416-417 ◽  
pp. 845-848
Author(s):  
Qiang Rong
Keyword(s):  
Operating System ◽  
Control System ◽  
Hydraulic System ◽  
Hydraulic Drive ◽  
Network Control ◽  
Control System Design ◽  
Construction Machinery ◽  
New Methods ◽  
Computer Operating System ◽  
And Control

The application of hydraulic drive as well as control technology to construction machinery control as well as operating system has been very common. In this paper, network control system is briefly introduced first, and then the computer controls of vehicle and construction machinery hydraulic system are discussed respectively from the new methods for the motion control and integration of drive and operating system, and the operating and control system design of beam lifting machine DJY200.

scholarly journals A new process to develop a hydraulic system adapted to biodegradable hydraulic oil for construction machinery

Synthesiology ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 57-74
Author(s):  
Satoshi OHKAWA ◽  
Sunkil YUN ◽  
Taketoshi HIBIYA ◽  
Hidekazu NISHIMURA
Keyword(s):  
Hydraulic System ◽  
Construction Machinery ◽  
Hydraulic Oil ◽  
New Process

Simulation and Experimental of Shifting Performance of Construction Machinery

2014 ◽  
Vol 889-890 ◽  
pp. 998-1002
Author(s):  
Feng Ren ◽  
Xin Hui Liu ◽  
Jin Shi Chen ◽  
Ping Zeng ◽  
Bo Liang Liu
Keyword(s):  
Mathematical Model ◽  
Simulation Model ◽  
Experimental Verification ◽  
Hydraulic System ◽  
System Simulation ◽  
Performance Characteristics ◽  
Construction Machinery ◽  
Working Principle ◽  
Pressure Changes ◽  
Amesim Simulation

The main objective to study shift buffer impact of shifting process of construction machinery.introduces the working principle of main valve and wet multi-clutch,and developing a mathematical model and AMESim simulation model. analyzes the characteristics of pressure changes during the shift, buffering characteristics and impact on the performance characteristics, and experimental verification. The results showed that: the shift hydraulic system simulation model accurately credible; good performance of the system can effectively reduce shift jerk.

Analysis on the Shifting Performance of the Hydraulic System of a Transmission for Construction Machinery

2011 ◽  
Vol 201-203 ◽  
pp. 2206-2211
Author(s):  
Yan Min Li ◽  
Zhi Hua Liu ◽  
Dong Wang ◽  
Yong Zhang
Keyword(s):  
Simulation Model ◽  
Hydraulic System ◽  
Response Speed ◽  
Hydraulic Cylinder ◽  
Fast Response ◽  
Double Step ◽  
Construction Machinery ◽  
The Future ◽  
Simulation Results ◽  
Cartridge Valves

The paper discusses the performance of a hydraulic system controlling the shifting action of a construction vehicle transmission. Based on the principle of the hydraulic system of the transmission, a simulation model of the hydraulic system is established using AMEsim software. The simulation results indicate that the double-step hydraulic cylinder structure has an advantage of a fast, smooth and reliable shifting. The shifting connecting and separating overlap time of two clutches can be controlled precisely by an electronic joystick. The fast response speed can be ensured because using screw-in cartridge valves acting as the directional valves. Some techniques of improving the shifting quality are obtained. There is a great reference for the construction vehicles’ transmission in the future.

Design of Transportable Hydraulic System Fault Detection Equipment for Construction Machinery

2011 ◽  
Vol 66-68 ◽  
pp. 2022-2027
Author(s):  
Da Zhen Su ◽  
Xiao Qiang Yang ◽  
Jun Yan
Keyword(s):  
Fault Detection ◽  
Data Acquisition ◽  
Hydraulic System ◽  
Large Scale ◽  
Pilot Trial ◽  
Control Unit ◽  
Armed Forces ◽  
Hardware Platform ◽  
Construction Machinery ◽  
Pressure Transducers

Based on embeded technology a portable fault detection equipment for the construction machinery hydraulic system is developed. The equipment is mainly composed of embeded hardware platform and graphical-interface software platform. The hardware platform includes the core control unit ECM-945GSE industrial computer, 8-channel data acquisition module based on ARM chip, LCD screen, touch screen, power supply module with large-scale operation voltage and wide temperature range, PTT pressure transducers, the integration transducer of temperature, pressure, flow rate transducer as well as equipment chassis. The software system consists of data acquisition procedures, diagnosis, detection and output printing programs and drivers programs. The pilot trial in the armed forces shows that both detectors can be used in repair shop or indoor, but also in the field of construction machinery on-site emergency repair when rapid detection and diagnosis. And it has a strong adaptability.

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