Prediction of Residual Life of Construction Machinery Hydraulic Cylinders by Means of Simulation Results

2021 ◽  
Author(s):  
V. A. Zorin ◽  
Nguyen Trong Minh
Keyword(s):  
Residual Life ◽  
Construction Machinery ◽  
Hydraulic Cylinders ◽  
Simulation Results

Fatigue Life Assessment of Crane Reel

2011 ◽  
Vol 383-390 ◽  
pp. 2941-2944
Author(s):  
Wei Ming Du ◽  
Fei Xue
Keyword(s):  
Finite Element Method ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Residual Life ◽  
Life Assessment ◽  
Life Estimation ◽  
Fatigue Life Assessment ◽  
Weld Fatigue ◽  
Simulation Results ◽  
Cumulative Fatigue Damage

The crane reel is generally manufactured by section welding method when the diameter is over 380mm. With the cumulative fatigue damage principle which is based on stress S-N curve, the fatigue damage of one crane reel is analyzed by finite element method, the reel weld fatigue strength and fatigue life are calculated, and the simulation results are proved to be reliable. This method provides an efficient reference for crane reel design and residual life estimation.

Modeling, Experimentation, and Simulation of an Air-Over-Hydraulic Brake System

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Xicheng Xiong ◽  
Jianhua Wei ◽  
Jian Chen
Keyword(s):  
Experimental Data ◽  
System Modeling ◽  
Brake System ◽  
Hydraulic Actuator ◽  
Similar System ◽  
Modeling And Analysis ◽  
Construction Machinery ◽  
Simulation Results ◽  
Mechanical Dynamics ◽  
Development And Validation

This paper deals with the development and validation of an analytical dynamic model of an air-over-hydraulic (AOH) brake system that is widely used on loaders. The AOH system is broken into five simple and cascaded subsystems, pneumatic circuit, air-hydraulic actuator, brake line, wheel cylinder, and disk brake. Pneumatic, hydraulic, and mechanical dynamics are taken care of in each subsystem. The determination of model coefficients is introduced in detail. Many experiments are performed on an experimental setup of the real AOH system on a loader and the experimental data are compared with the simulation results. Preliminary analysis shows that the simulation results are in good agreement with the experimental data. Other researchers in the areas of brake systems in construction machinery would find the model useful for similar system modeling and analysis

Impact Energy Measurement of a Hydraulic Breaker

2006 ◽  
Vol 326-328 ◽  
pp. 1669-1672
Author(s):  
Jong Won Park ◽  
Hyoung Eui Kim
Keyword(s):  
Construction Industry ◽  
Impact Energy ◽  
High Speed ◽  
Test System ◽  
Hydraulic Power ◽  
Construction Machinery ◽  
Road Pavement ◽  
Hydraulic Cylinders ◽  
The Impact ◽  
Test Process

A hydraulic breaker for construction machinery generally used for the destroying and disassembling of buildings, crashing road pavement, breaking rocks at quarry and so on. So the measurement of the impact energy of a hydraulic breaker is very important thing to prove its capability to manufacturers and customers. In this study, the test system for measuring the impact energy of a hydraulic breaker was designed and constructed. The test system was consisted with hydraulic cylinders for mounting a breaker, impact absorbing base and frames, pressure and flow sensors, high speed and accurate data acquisition system diesel engine driven hydraulic power unit. The test process of the developed system was carried by measuring guide for tool energy rating for hydraulic breakers which was developed by the CIMA (Construction Industry Manufacturers Association) USA. The developed test system can be applied to measure the impact energy for various kinds of hydraulic breakers.

scholarly journals Adaptive Link Aware on-demand Multicast Routing Scheme in MANET

2018 ◽  
Vol 9 (1) ◽  
pp. 56
Author(s):  
Ruban Chakravarthy ◽  
G. Ranganathan
Keyword(s):  
Multicast Routing ◽  
Residual Life ◽  
Source Node ◽  
Delivery Ratio ◽  
Multicast Group ◽  
Packet Delivery ◽  
On Demand ◽  
Routing Scheme ◽  
Dynamic Topology ◽  
Simulation Results

<em>The main objective of this paper is to propose a new multicast routing scheme to adopt with the dynamic topology of MANET at the same time to provide high multicast efficiency and packet delivery ratio. The proposed scheme is named as Link Aware on Demand Multicast Routing (LAOMR) scheme. In this scheme, initially the source node forms the multicast group by announcing itself as a multicast source agent to all the nodes in the network. The nodes which are eager to join in the group are sending the join request to the source node. Then the source node finds the route to reach the multicast group through some intermediate nodes. The intermediate nodes are not interested to hear the multicast message but they are act as the routers to forward the packets to the multicast group. The intermediate nodes are chosen based on the link residual life (LRL) of the nodes. The node which has the highest LRL and closer to the multicast group is selected as the forwarder node. So, the proposed scheme reduces the link failure in the multicast route and increases the multicast efficiency, throughput. The performance is evaluated by using the simulation results obtained from NS2 Simulator.</em>

A Symmetric Multichamber Hydraulic Cylinder with Variable Piston Area: An Approach to Compact and Efficient Electrohydrostatic Actuation

2020 ◽  
pp. 1-35
Author(s):  
Harrison Bartlett
Keyword(s):  
Design Methodology ◽  
Hydraulic Cylinder ◽  
Power Losses ◽  
Symmetry Constraint ◽  
Standard Methods ◽  
Motor Torque ◽  
Actuation System ◽  
Constant Area ◽  
Hydraulic Cylinders ◽  
Simulation Results

Abstract This paper presents an approach for designing symmetric (effective cylinder area during extension is the same as that during retraction) multichamber cylinders with discretely variable piston area. The design methodology is presented in a generalizable manner and is demonstrated on an example five chamber cylinder design. A method for finding symmetric multichamber cylinder configurations from a given cylinder topology is presented, and subsequently, a method for discretely varying the effective piston area is developed, subject to a cylinder symmetry constraint. Furthermore, an algorithm is presented to optimally switch the effective cylinder area of an electrohydrostatic actuation system either to minimize the magnitude of motor torque or to minimize resistive power losses in the system. Additionally, a method for optimizing standard (constant area) hydraulic cylinders to minimize motor torque magnitude or resistive power losses is presented. These methods are then demonstrated on an example electrohydrostatic actuation system via simulation. Results indicate that this multichamber cylinder approach with discretely variable piston area may allow for the design of compact and efficient actuators relative to standard methods.

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.

A Hardware-in-the-Loop Platform for a Typical Construction Machinery Real-Time Test

2013 ◽  
Vol 392 ◽  
pp. 535-538
Author(s):  
Wen Gong ◽  
Zhong Jian Yu
Keyword(s):  
Real Time ◽  
Dynamic Model ◽  
Low Cost ◽  
Hydraulic Excavator ◽  
Hardware In The Loop ◽  
Time System ◽  
Real Time System ◽  
Construction Machinery ◽  
Time Test ◽  
Simulation Results

In order to supply a reliable and low-cost method for construction machinery real-time test, take a hydraulic excavator for example. Especially for testing controllers and evaluating the performance of strategies, a hardware-in-the loop platform has been developed based on the xPC real-time system. The hardware-in-the-loop system, including dynamic model of the excavator and an 3D real-time display subsystem, is presented in this paper. The simulation results are also described at the end of the paper.

Modeling of Vertical Planar Two-Link Manipulator

2010 ◽  
Vol 164 ◽  
pp. 366-370
Author(s):  
Zdzisław Gosiewski ◽  
Grzegorz Michałowski
Keyword(s):  
Degrees Of Freedom ◽  
Equations Of Motion ◽  
Matlab Simulink ◽  
Hydraulic Cylinders ◽  
Simulation Results

Modeling of kinematics of hydraulically-driven manipulator is presented in the paper. The analyzed electrically-controlled vertical planar two-link manipulator has two rotary degrees of freedom and includes two hydraulic cylinders that form additional links thereby resulting in excavator type mechanism. Equations of motion are derived. Provided simulation results of the manipulator endpoint position, velocity, and acceleration are obtained by Matlab/Simulink.

Application of Hydraulic Transformer on Energy Saving for Boom System of Hybrid Hydraulic Excavator

2017 ◽  
Vol 868 ◽  
pp. 118-123 ◽  
Author(s):  
Ying Xiao Yu ◽  
Kyoung Kwan Ahn
Keyword(s):  
Potential Energy ◽  
Energy Saving ◽  
High Efficiency ◽  
Hydraulic Excavator ◽  
Effective Solution ◽  
Construction Machinery ◽  
Hydraulic Transformer ◽  
Simulation Results ◽  
Hybrid Excavator ◽  
Save Energy

Facing the energy crisis and environmental problems, saving energy of construction machinery, especially in the hydraulic excavator is very important. Regeneration of the potential energy is an effective solution to save energy. However, the conventional hybrid excavator can’t regenerate the potential energy. This paper proposes a new structure of boom system of hydraulic excavator as well as a control strategy. The focus of the paper is using hydraulic transformer to regenerate energy and reusing the regenerated energy. The simulation is carried out by the AMESim software. From the simulation results, this new system has a high efficiency for energy saving.

scholarly journals Extremely Vibrant Routing Scheme for Mobile Adhoc Network

2018 ◽  
Vol 9 (2) ◽  
pp. 306
Author(s):  
Syes Abdul Syed S ◽  
T Senthil Kumaran
Keyword(s):  
Routing Protocol ◽  
Residual Life ◽  
Dynamic Environment ◽  
Link Failure ◽  
Routing Overhead ◽  
Routing Scheme ◽  
Mobile Adhoc Network ◽  
Adhoc Network ◽  
Ns2 Simulator ◽  
Simulation Results

This paper aims to improve the performance of the traditional routing protocol for MANET such as DSR and AODV in terms of delay and overhead. The proposed routing scheme is called as Extremely Vibrant Routing (EVR) which adopts with the highly dynamic environment of MANET. The link residual life is estimated to reduce the link failure before forwarding data through a node. The velocity of the moving mode is considered while choosing the next forwarder node. This enables the EVR to decrease the delay in the network. The proposed routing scheme reduces routing overhead and reduces the delay. This scheme reduces the link failure too. The performance is evaluated by using the simulation results obtained by using NS2 simulator.

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