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굴삭기 Human-In-The-Loop 시뮬레이터 개발
이상욱(S. U. Lee),오상민(S. M. Oh),한관수(K. S. Han),황성호(S. H. Hwang) 유공압건설기계학회 2017 유공압건설기계학회 학술대회논문집 Vol.2017 No.11
The excavator modeling based on conventional MCV is performed by using Amesim. There have been many researches on excavator modeling using commercial software. However, because it is necessary to define the input values before execution of the simulation, it is mainly used to characterize the hydraulic system behavior under the typical input conditions. In this paper, we developed a human-in-the-loop simulator that can generate user inputs from an external device such as a joystick as in the actual work environment. By performing co-simulation between the hydraulic system model using Amesim and the user interface software using LabVIEW, the various simulations are performed by inputting the user’s real-time operating signals. This allows the user to observe the pressure and flow rate of the hydraulic system and the displacement behavior of the actuator when the joystick is operated in similar conditions as in an actual environment. In the future, this developed simulator could be used in such areas as excavator driving practice and operators fatigue analysis if coupled with a working load model.
EXPERIMENTAL STUDY ON THE IMPACTION PIN NOZZLE FOR INLET FOGGING
Abhilash Suryan,김동선(D. S. Kim),오상민(S. M. Oh),김희동(Heuy-Dong Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
The compression work is a strong function of the ambient air temperature. Increase in compression work thus presents a significant problem to utilities, generators and power producers when electric demands are high during the hot summer months. In many petrochemical and process industries and gas turbine power plants, this increase in compression work results in considerable increase in the power requirements to drive the compressor. One way to counter this problem is to directly cool the inlet air. Inlet fogging is a popular means of cooling the inlet air to air compressors. In the present study, experiments have been performed to investigate the suitability of impaction pin nozzle for inlet fogging. The supply pressure is varied between 140bar G and 210 bar G and the water flow rate is measured for each case. The flow visualization and temperature measurement are carried out to specify the fogging characteristics and the rate of evaporation of the droplets from the impaction pin nozzle.