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오늘 본 자료
Analysis of the Mathematical Model of a Variable Displacement Vane Pump for Engine Lubrication
D. Q. Truong(딩광청),K. K. Ahn(안경관),J. S. Lee(이재신) 유공압건설기계학회 2014 드라이브·컨트롤 Vol.11 No.1
Variable displacement vane-type oil pumps represent one of the most innovative pump types for industrial applications, especially for engine lubrication systems. This paper presents a complete and accurate mathematical model for a typical variable displacement vane-type oil pump. Firstly, its theoretical model is revised. Secondly, an analysis of power loss factors of this pump type is carefully investigated to optimize the modeling accuracy. Finally, the estimated pump performance using the complete pump model is verified by numerical simulations in comparison with the practical tests.
Development of a mathematic model for a variable displacement vane pump for engine oil
딩광청(D. Q. Truong),안경관(K. K. Ahn),윤종일(J. I. Yoon),이재신(J. S. Lee) 유공압건설기계학회 2012 드라이브·컨트롤 Vol.9 No.4
Variable displacement vane type oil pumps represent one of the most innovative pump types for industrial applications, especially for engine lubrication systems. This paper deals with a modeling method for theoretical flow rate investigation of a typical variable displacement vane type oil pump. This theoretical model is based on the pump geometric design and dynamic analyses. It can be considered as mandatory steps for a deeper understanding of the pump operation as well as for effectively implementing the pump control mechanisms to satisfy the urgent demands of engine lubrication systems. The developed pump model is finally illustrated by numerical simulations.
Modeling and Performance Investigation of Forklift Transmission Control Valve System
D. Q. Truong(딩광청),K. K. Ahn(안경관),J. W. Yoon(윤장원) 유공압건설기계학회 2014 드라이브·컨트롤 Vol.11 No.3
In forklifts, the machine performance is largely depended on the transmission performance. The aim of this paper is to develop a complete model of transmission control valve (TMV) system of a typical forklift using AMESim simulation tool. By using the developed TMV model, it becomes easy to investigate the system concept, working principle, and performance. In addition, an optimization on the TMV structure can be achieved by using this model with tunable parameters. Simulations have been carried out in a comparison with the actual experiments to verify the model.
A psycho-biological controller for electro-hydraulic actuator position controlling
S. A. Nahian(시아부나히안),D. Q. Truong(딩광청),K. K. Ahn(안경관) 유공압건설기계학회 2013 유공압건설기계학회 학술대회논문집 Vol.2013 No.10
Modern research have been relying on electro-hydraulic actuators owing to its high nonlinearity and uncertainty. Therefore, to solve the control problem like trajectory control, researchers proposed many control idea in different ways. One of the very recent innovations named Brain Emotional Based Intelligent Controller (BELBIC) is becoming a well known model free adaptive controller which has effective capabilities to handle nonlinearities and uncertainties. This paper proposed a modified version of BELBIC where fuzzy inference system tunes the reward function parameter of it for the trajectory control of EHA system. Results implied that proposed controller has the ability to follow different reference trajectory with minimal position error which bear out strongly the aptitude of the proposed control method.