Hardware-in-Loop Simulation on Hydrostatic Journal Support Pose

A scheme of improving performance of hydrostatic journal support was presented, that is, control journal support pose by controlling flow of four controllable chambers and Coupling various oil film thickness, to assure journal support expected pose; Chamber flow can be regulated by electro hydraulic servo valve-control variable pump according to the surface roughness, load, cutting force, and thermal results of journal support. The mathematical model of the controllable chambers flow, servo variable mechanism and controller were built; the pose control model was established, which contain the kinematics positive and negative solution and control strategy of hydraulic cylinder position feedback; Hardware-in-loop simulation experiment was carried on the electro hydraulic servo test bench by mean of the non-linear relation of film thickness and the hydraulic cylinder displacement. Simulation and Hardware-in-loop simulation experiment results show that the controllable journal support exhibit high oil film rigidity can stably and quickly track the expected goal and can be broadly applied in high precision heavy horizontal machine tool.

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The Modeling and Control of the Hydraulic Servo System by Using On-Off Valve

10.1115/imece2000-2317 ◽

2000 ◽

Author(s):

Xuanyin Wang

Keyword(s):

Servo System ◽

Mathematic Model ◽

Hydraulic Cylinder ◽

Servo Control ◽

Linear Quadratic ◽

Modeling And Control ◽

Hydraulic Servo ◽

Self Tuning ◽

Hydraulic Servo System ◽

And Control

Abstract This paper researches on the hydraulic servo system by using ordinary on-off valves. The mathematic model of an asymmetric hydraulic cylinder servo control system is built, and its characteristic is analysed here. To reduce the static and dynamic characteristic differences between forward and reverse motion of asymmetric cylinder, and improve system’s performance, a self-tuning linear quadratic gaussian optimum controller (SLQG) is designed successful. In the end, an asymmetric hydraulic cylinder servo system of paint robot is researched. The result shows that the above method is effective.

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Comparison Precision of Oil Film Thickness of a Hydrostatic Bearing by Using Different Controllers under External Load

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.415.192 ◽

2013 ◽

Vol 415 ◽

pp. 192-195

Author(s):

Ming Chang Shih ◽

Jen Sheng Shie

Keyword(s):

Film Thickness ◽

Fuzzy Controller ◽

Sliding Mode ◽

Dead Zone ◽

Displacement Sensor ◽

Practical Implementation ◽

Oil Film ◽

Hydrostatic Bearing ◽

Hydraulic Servo ◽

Self Tuning

This paper describes a hydrostatic bearing to maintain the oil film thickness, which integrates the hydraulic servo control technology. This study has designed the different intelligent nonlinear controllers by using a non-contact displacement sensor to feedback the oil film thickness of the bearing. This study proposes a fuzzy controller, a self-tuning fuzzy controller and a self-tuning fuzzy sliding mode mechanism to modify the output scaling factor and adds a dead zone compensator to achieve a constant oil film thickness. Finally, the experimental results are used to verify the feasibility and practical implementation success of this study.

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Hardware in Loop Simulation for Missile Guidance and Control Systems

Defence Science Journal ◽

10.14429/dsj.47.4016 ◽

1997 ◽

Vol 47 (3) ◽

pp. 343-357 ◽

Cited By ~ 6

Author(s):

S. K. Chaudhuri ◽

G. Venkatachalam ◽

M. Prabhakar

Keyword(s):

Control Systems ◽

Missile Guidance ◽

Guidance And Control ◽

Hardware In Loop ◽

Hardware In Loop Simulation ◽

And Control

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Analysis and Revision of Torque Formula for Hydro-viscous Clutch

Energies ◽

10.3390/en14237884 ◽

2021 ◽

Vol 14 (23) ◽

pp. 7884

Author(s):

Xiangping Liao ◽

Shuai Yang ◽

Dong Hu ◽

Guofang Gong

Keyword(s):

Film Thickness ◽

Static Friction ◽

Groove Depth ◽

Oil Film ◽

Soft Start ◽

Engineering Significance ◽

Model Of Friction ◽

Water Pumps ◽

Viscous Torque ◽

And Control

Hydro-viscous clutch is a speed-regulating device for heavy fans and water pumps. It has important engineering significance in the fields of soft-start for rotating machinery. More and more attention has been paid to its torque and control characteristics. This paper is focused on the torque formula for hydro-viscous clutch (HVC), assuming that multi-friction plates distribute ununiformly with different oil film thickness. A mathematical model of friction plates was constructed, then the distribution formula of the oil film thickness was obtained. A new expression was presented using a modified factor. Parameters such as pressure, viscous torque, and oil film thickness were obtained. The results show that each clearance of friction plates is not the same and the distribution of oil film thickness is influenced by pressing force, groove depth, angular ratio of groove/non-groove, and static friction force. To verify the proposed expression, relevant experiments were carried out on an HVC with multi-friction plates, and the experimental results indicate that the new expression is more accurate compared to the original one.

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Research on the Characteristic Description and the Numerical Model of 4G15-6L Automotive Engine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.201-202.127 ◽

2012 ◽

Vol 201-202 ◽

pp. 127-130

Author(s):

Lei Zhang ◽

Yan Chen ◽

Xiu Min Yang ◽

Chun Yang Zhou ◽

Wen Jia Zhang

Keyword(s):

Experimental Data ◽

Mathematical Model ◽

Numerical Model ◽

Simulation Model ◽

Simulation Experiment ◽

Automotive Engine ◽

Engine Simulation ◽

Set Up ◽

Hardware In Loop ◽

Hardware In Loop Simulation

This article mainly discussed the establishing process of the 4G15-6L automotive engine simulation model. The numerical model was set up for the engine using engine’s experimental data. Therefore the engine’s optimal economic and dynamic curves were drawn. According to the established mathematical model, the simulation experiment model can be built by Matlab or Simulink. The feasibility and reliability of the model were verified through the test, and the model met the requirements of hardware in loop simulation. Meanwhile, the model built the foundation of the engine’s simulation platform in the next step.

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Automobile Controller Development Based on dSPACE

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.542-543.919 ◽

2012 ◽

Vol 542-543 ◽

pp. 919-923

Author(s):

Yue Xin Wang ◽

Bo Zhang

Keyword(s):

Testing System ◽

Central Control ◽

Control Node ◽

Position Signal ◽

Standard Component ◽

Simulation Testing ◽

Hardware In Loop ◽

Hardware In Loop Simulation ◽

And Control ◽

To Receive

Automobile central lock and ABS hardware in loop simulation testing system was developed based on MATLAB/Simulink and dSPACE, dSPACE’s standard component MicroAutoBox is the central control node, used to receive speed signal, key position signal skid ratio and remote signal, together with dealing with these signals. Sending relative signals to CAN SJA1000 and CAN PCA82C250 which SCM use STC89C52RC, each node actuates relative motion to control automobile’s door lock and ABS system. ABS executer implements relative brake based of these signals requirements. The result indicates that dSPACE simulation platform can quickly build up model and control system.

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