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Performance Evaluation of a Vane Motor Driven by Liquefied Hydrogen Peroxide
홍득의,류가람,이권희,한승호 한국정밀공학회 2013 International Journal of Precision Engineering and Vol.14 No.7
Liquefied hydrogen peroxide has attracted attention as a mono-propellant energy source for systems that require a simple, lightweight structure. Its application has been extended to aerospace and deep-sea submarine systems, because this system has no need of an oxidizer and no hazardous products are discharged. For further industrial applications, however, a feasibility study should be carefully conducted with respect to power-supply efficiencies such as specific power density. In the present study, a prototype of a vane motor driven by liquefied hydrogen peroxide with a high density (95%) was developed and performance characteristics such as the specific power density were estimated by measuring the pressure and rotation speed of the vane motor, and by numerical simulation using FSI (Fluid-Structure-Interaction) analysis. The obtained specific power density reached 0.02 kW/kgf, which approximates the levels of the most up-to-date fuel cells.
홍득의(Deuk Eui Hong),류가람(Ga Ram Ryu),안대균(Dae Gyun Ah),한승호(Seung Ho Han) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Recently, there is very high demand of a wearable robot which enables to perform works under a severe environment such as field operation and maneuver under water. Since it should have a simple structure with light weight, an appropriate power generating system i.e. type of strap-on strength is required. Monopropellant such as a liquified hydrogen peroxide is drawing attention as this type of power generating energy source. The liquified hydrogen peroxide is attracted due to its outstanding applicability to the wearable robot because it doesnt require an oxidizer and discharge a hazardous product. For the further industrial applications, however, a feasibility study should be carried out carefully in the aspect of the specific power density. In this study, a prototype of vane motor driven by the liquified hydrogen peroxide with high density upper 90% was developed, and its performance characteristic such as a specific power was estimated. The specific power density obtained by numerical simulation using FSI analysis supported by experimental results was up to 0.055kW/kgf, which reaches at the level of the latest developed fuel cell.
홍득의(Deuk-Eui Hong),류가람(Ga-Ram Ryu),한승호(Seung-Ho Han) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.5
Liquified hydrogen peroxide as a monopropellant is drawing an attention as a power generating energy source for a machine requiring simple and light weight structure. The liquified hydrogen peroxide is attracted due to its outstanding applicability because it doesn"t require an oxidizer and discharge a hazardous product. For the further industrial applications, however, a feasibility study should be carried out carefully in the aspect of the specific power density. In this study, a prototype of vane motor driven by the liquified hydrogen peroxide with high density of upper 95% was developed and its performance characteristic such as a specific power density was estimated via measuring pressure and rotation speed of the vane motor. The specific power density obtained by numerical simulation using FSI analysis supported by experimental results was up to 0.02kW/kgf, which reaches at the level of the latest developed fuel cell.
고농도 과산화수소 기반 유압시스템의 위치제어를 위한 PID 제어기 설계
류가람(Ga Ram Ryu),홍득의(Deuk Eui Hong),한승호(Seung Ho Han) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
The purpose of this paper is to design a PID controller for effective position control of hydraulic cylinder based by the high density liquified hydrogen peroxide. A widely used PID control structure is applied to the hydraulic system, where proper PID control gains are obtained by position control using experimental trialand-error method. in next step, A neural network is employed to generate appropriate PID control gains. Here the PID gains based on the trial-and-error method are used as training data. In this study, several series of simulation were carried out to find that the performance of the designed controller using the neural was more great than the conventional PID controller in terms of faster position control.