scholarly journals The RAMPDOOR HYDRAULIC SYSTEM MODIFICATION OF ANOA PANZER COMBAT VEHICLE

2021 ◽  
Vol 2 (Oktober) ◽  
pp. 29-39
Author(s):  
Muhammad Soleh ◽  
Dedy Pradigdo ◽  
Budi Harijanto
Keyword(s):  
Hydraulic System ◽  
First Generation ◽  
Hydraulic Cylinder ◽  
Opening Angle ◽  
Hydraulic Pump ◽  
Working Pressure ◽  
Combat Vehicle ◽  
Hydraulic Cylinders ◽  
Armored Vehicle ◽  
Maximum Opening

Panzer Anoa 6x6 is a combat vehicle on tires where the first generation of it is made by PT Pindad (Persero). It can mobility, protection and carrying capacity. The ramp door on the Anoa 6x6 APC armored vehicle is driven by a hydraulic system to support the mobility of personnel when exiting or entering the vehicle. The components of the hydraulic system driving the Panzer Anoa 6x6 APC ram door include batteries, power packs, solenoid valves, hydraulic hoses, and hydraulic cylinders. These problems include the ramp door often not functioning, the ramp door moving too slowly and often experiencing congestion when the ramp door is working. These constraints often occur because the pump in the hydraulic system is driven by an electric motor that gets its power source from the battery. The fluid is pressed and flowed through a hydraulic pipe, then the flow of the pressurized fluid is regulated by a solenoid valve to the hydraulic cylinder to move the ramp door. This study uses a pure experimental quantitative method with empirical calculations to obtain a tool with the desired specifications. To move the ramp door weighing 200 kg with a maximum opening angle of 100 degrees in 8 seconds, the heaviest load received by the cylinder is 23557.44 N, the working pressure that occurs in the cylinder is 87.49 bar, where the fluid discharge will flow to the pump. of 2164.77 liters/minute, with a pump power of 394570 Watt and to continue the rotation of the engine with a rotation of 2814.13 rpm (idle) to the hydraulic pump using a pulley mechanism with a ratio of 1: 0.15.

Research of Hydraulic Cylinders Dynamic Characteristic and Synchrocontrol on Horizontal Pipes Connector in Deep Sea

2012 ◽  
Vol 164 ◽  
pp. 421-424
Author(s):  
Zhuo Wang ◽  
Yan Jie Li ◽  
Bo Zhang ◽  
Wei Zhang ◽  
Y.Z. Zhang
Keyword(s):  
Dynamic Characteristic ◽  
Deep Sea ◽  
Hydraulic System ◽  
Pid Controller ◽  
Simulation Analysis ◽  
Hydraulic Cylinder ◽  
Horizontal Pipes ◽  
Differential Coefficient ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo

The electro-hydraulic position-servo synchronization system of horizontal pipes connector was designed in order to connect two pipes in deep sea and make sure the journey of synchronization hydro-cylinders in the hydraulic system is less than 2 mm.Its transfer function of symmetric servo controlling oil-cylinder electro-hydraulic servo system were derived . Simulation analysis of its dynamic characteristic was done, and PID controller was applied on the system to regulate two hydraulic cylinder synchronization controls. In the end ,when the proportionality coefficient is Kp=0.55,integral coefficient is Ki=60,differential coefficient is Kd=0,the error of synchronic displacement was less than 0.5 mm, that achieved the request of the control system.

Development of Hydraulic Control Jam Release Device for Workover

2010 ◽  
Vol 139-141 ◽  
pp. 1010-1013
Author(s):  
Guang Zheng Jia ◽  
Shuo Wang ◽  
Fu Chen Zhang
Keyword(s):  
Economic Benefit ◽  
Oil Field ◽  
Hydraulic Control ◽  
Hydraulic Pump ◽  
Working Pressure ◽  
Lifting Force ◽  
Release Device ◽  
Hydraulic Cylinders ◽  
Force Range ◽  
Release Force

Developed a device used to assist workover rig in lifting stuck tubing strings from the well during workover treatment, it can create well economic benefit for oil field. The device adopts remote hydraulic control, which is safe and reliable. The structure and work principle of the device is illustrated. The jam release device is mainly made up of hydraulic cylinders, hydraulic pump and hydraulic control valves. With the coordination between lifting hydraulic cylinders and hydraulic slips, the device can lift tubing strings from the well. The important loading unit of the device is analyzed by finite element. The working pressure is made from 5MPa to 20MPa, corresponding to lifting force range of 229kN to 915.6kN, which can meet the jam release force in workover treatment.

A novel pump-valve coordinated controlled hydraulic system for the lower extremity exoskeleton

2020 ◽  
Vol 42 (15) ◽  
pp. 2872-2884
Author(s):  
Jinlin Jiang ◽  
Yu Wang ◽  
Heng Cao ◽  
Jun Zhu ◽  
Xinbin Zhang
Keyword(s):  
Lower Extremity ◽  
Hydraulic System ◽  
Hydraulic Cylinder ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Functional Requirements ◽  
Hydraulic Cylinders ◽  
Pump Valve ◽  
High Energy Conversion Efficiency ◽  
The Moment

In order to reduce the weight and improve the energy efficiency of the lower extremity exoskeleton, a novel pump-valve coordinated controlled (PVCC) hydraulic system is presented. This hydraulic system only uses one electro-hydrostatic unit (EHU) and two valves to drive two hydraulic cylinders at the hip and knee of the lower extremity exoskeleton. The PVCC hydraulic system has the advantage of high energy conversion efficiency of the electro-hydrostatic actuator (EHA), which consists of one EHU and one hydraulic cylinder. To meet the requirements of the moment and speed of each joint of the exoskeleton, the proportional valve and on-off valve are added to adjust the flow into two hydraulic cylinders. The performance of EHU is tested by some hydraulic experiments, and the performance of the PVCC hydraulic system is analyzed by AMESim. The results show that the novel hydraulic system can only use one EHU to drive two hydraulic cylinders simultaneously under the premise of meeting the functional requirements of the exoskeleton.

scholarly journals Modeling and Predictive Analysis of Small Internal Leakage of Hydraulic Cylinder Based on Neural Network

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2456
Author(s):  
Yuan Guo ◽  
Ge Xiong ◽  
Liangcai Zeng ◽  
Qingfeng Li
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Hydraulic System ◽  
Hydraulic Cylinder ◽  
Strain Gauges ◽  
System Failure ◽  
The Neural Network ◽  
Hydraulic Cylinders ◽  
The Neural Networks ◽  
Working Efficiency

The internal leakage of a hydraulic cylinder is an inevitable hydraulic system failure that seriously affects the working efficiency of the hydraulic system. Therefore, it is very important to accurately identify and predict leakage data in the hydraulic cylinder. In this paper, a model is proposed to simulate a small internal leakage of hydraulic cylinders, to convert the amount of leakage of hydraulic oil into strain signals through high-precision strain gauges and to train the collected strain signals using various neural networks to form a computational model and obtain prediction results from the model. The neural networks applied in this paper are convolutional neural networks, BP neural networks, T-S neural networks and Elman neural networks. The predicted results of the neural network are compared with the actual leakage amount. The results show that the prediction accuracy of the above four kinds of neural networks are all above 90%, of which the convolutional neural network is the most accurate. This research provides scientific and technical support for measuring and predicting small leaks.

Compare the Dynamic Characteristics of Inlet and Outlet Throttle Speed-Regulating Hydraulic System

2012 ◽  
Vol 462 ◽  
pp. 833-838
Author(s):  
Hong Yan Yang ◽  
Ge Jin Hu
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Hydraulic System ◽  
Working Condition ◽  
Hydraulic Cylinder ◽  
Hydraulic Pump ◽  
Relief Valve ◽  
System Parameters ◽  
Hydraulic System Design ◽  
Equipment Performance

A comprehensive mathematical model of the hydraulic inlet and outlet throttle speed-regulating system was established that included most components’ dynamic characteristics such as the hydraulic cylinder, the throttle valve, the hydraulic pump, the relief valve. The simulink of matlab was used to emulate the equations. The system parameters for example throttle opening area, oil bulk modulus were analyzed how to influence the dynamic characteristics of throttle speed control system. How to correctly select circuit under working condition and how to improve equipment performance in the hydraulic system design are indicated through comparing the dynamic characteristics of inlet and outlet speed-regulating circuit.

scholarly journals Prototipe double acting cylinder transparan sebagai media pembelajaran sistem hidrolik

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Tri Pratomo ◽  
Rina Dwi Yani ◽  
Maryono Effendi ◽  
Dovian Iswanda ◽  
Alban Naufal ◽  
...  
Keyword(s):  
Hydraulic System ◽  
Hydraulic Cylinder ◽  
Tensile Tests ◽  
Maximum Pressure ◽  
Test Results ◽  
Transparent Material ◽  
Cylinder Length ◽  
Hydraulic Cylinders ◽  
Inner Diameter ◽  
Design Pressure

Double acting cylinders in its application are widely used in the industry and are often applied in maintenance or repair instruments. The purpose of this research is to design and make a double acting cylinder so that the movement of the hydraulic cylinder its fluid flow can be seen clearly and easily implemented in the movement process, especially in the learning process. The research employs experimental method by directly design a transparent double acting cylinder. This transparent double acting cylinder will later be applied to the hydraulic trainer. The steps taken were determining the transparent material, making material samples for tensile tests, designing and making hydraulic cylinders, conducting hydraulic cylinder tests using Autodesk Inventor 2019. From the test results of hydraulic cylinders made from acrylic using Autodesk Inventor 2019, the minimum pressure that occurs is 1,456 MPa and the maximum pressure that occurs is 6,573 MPa, in operation, the recommended pressure 1,456 to 5,551 MPa, double acting transparent cylinder which has a transparent hydraulic cylinder length of 250 mm, thickness 11.4 mm, hydraulic cylinder inner diameter 32 mm, hydraulic cylinder locking uses 4 bolts with size M8, design pressure 23 kg/cm².Keywords: hydraulic system, double acting cylinder, transparent.

The Lower Extremity Exoskeleton Coordinated Control Method Based on Human Electromechanical Coupling

2012 ◽  
Vol 220-223 ◽  
pp. 1012-1017
Author(s):  
Qing Guo ◽  
Dan Jiang
Keyword(s):  
Lower Extremity ◽  
Electromechanical Coupling ◽  
Position Control ◽  
Control Method ◽  
Angular Displacement ◽  
Stability Margin ◽  
Hydraulic Cylinder ◽  
Load Force ◽  
Hydraulic Cylinders ◽  
Coupling Characteristics

This paper has introduced electromechanical coupling characteristics in the lower extremity exoskeleton systems, considered model ,according to legs supporting gait when people walking, established the load torque compensation model , and a mathematical model of knee position control system which is made of the servo valve, hydraulic cylinders and other hydraulic components, designed hydraulic cylinder position control loop in case of existing load force interference compensation, and used the method of combining the PID and lead correction network for frequency domain design ,ensured system to meet a certain stability margin. The simulation results show that this position control method can servo on the knee angular displacement of normal human walking, reached a certain exoskeleton boost effect, at the same time, met the needs of human-machine coordinated motion.

Development of hydraulic cylinder diagnostic methods by modeling methods

2021 ◽  
pp. 41-45
Author(s):  
Keyword(s):  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Technical Condition ◽  
Diagnostic Methods ◽  
Technical Diagnostics ◽  
Remaining Service Life ◽  
Construction Machine ◽  
Piston Speed ◽  
Variable Nature ◽  
Hydraulic Cylinders

The hydraulic drive of a construction machine is a complex dynamic system that is subjected to many dynamic loads of a variable nature and operates under conditions of variable external influences caused by various factors. During operation, these loads cause failure of the hydraulic transmission elements. To prevent these malfunctions, technical diagnostics should be applied by determining their current technical condition and remaining service life. The article assesses the working condition of hydraulic cylinders using a mathematical model. Using matlab/simulink software to simulate the hydraulic cylinder and hydraulic piston speed when changing the hydraulic cylinder clearance. The simulation results are presented. Keywords: diagnostic, hydraulic cylinder, simulation, development

Calculation of a closed hydraulic volumetric system

2021 ◽  
pp. 27-30
Author(s):  
Keyword(s):  
Power Plant ◽  
Wind Power ◽  
Hydraulic System ◽  
Working Fluid ◽  
Wind Power Plant ◽  
Hydraulic Systems ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Oil Pump ◽  
Selection Of

An algorithm is proposed for calculating a closed volumetric hydraulic pump-hydraulic motor system using the example of the hydraulic system of a wind power plant, based on the calculation of the hydraulic systems of mobile machines. The main characteristics of the system components, the selection of initial data for the calculation, working fluid and diameters of hydraulic lines are analyzed. Keywords: hydraulic system, energy, fluid, oil, pump, motor, renewable energy source, wind power plant, machine. [email protected]

Three Dimensional Seismic Isolation System Using Hydraulic Cylinder

2002 ◽  
Author(s):  
Shinichiro Kajii ◽  
Naoki Sawa ◽  
Nobuhiro Kunitake ◽  
K. Umeki
Keyword(s):  
Seismic Isolation ◽  
Three Dimensional ◽  
Vertical Direction ◽  
Hydraulic Cylinder ◽  
Seismic Load ◽  
3D Seismic ◽  
Isolation System ◽  
Response Characteristics ◽  
Seismic Motion ◽  
Hydraulic Cylinders

A three-dimensional (3D) seismic isolation system for FBR building is under development. The proposed vertical isolation system consists form hydraulic cylinders with water-based liquid and accumulators to support large vertical static load and to realize low natural frequency in the vertical direction. For horizontal isolation, laminated rubber isolator or sliding type isolator will be combined. Because the major part of the feasibility of this isolation system depends on the sealing function and durability of the hydraulic cylinder, a series of feasibility tests of the hydraulic cylinder have been conducted to verify the reliability against seismic load and seismic motion. This paper describes the specification of the seismic isolations system, seismic response characteristics and the results of the feasibility tests of the seal. This study was performed as part of a government sponsored R&D project on 3D seismic isolation.

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