Fig. 1. Schematic of an underwater discharge system using a linear pump
Fig. 2. Notation of hydraulic system
Fig. 3. Notation of water system
Fig. 4. Schematic of SIMULINK model
Fig. 5. Comparison between the present model and Park & Jung[6]’s model
Fig. 6. Examples of opening pattern of the flow control valve
Fig. 7. Operation limits with ramp or polynomial opening patterns of the flow control valve
Fig. 8. Operation limits with 4th order polynomial opening patterns of flow control valve
Fig. 9. Comparisons of cases with the same maximum acceleration of the underwater vehicle
Fig. 10. Comparisons of cases with the same escape velocity of the underwater vehicle
Fig. 11. Correlation coefficient of velocity of underwater vehicle
Fig. 12. Comparison between underwater vehicle velocity and piston velocity at ⓐ of Fig. 8
Fig. 13. Area of ‘Z’ with 4th order polynomial opening patterns of flow control valve
Fig. 14. Comparison of dimensionless velocity at maximum ‘Z’
참고문헌
- I. Park, “Simulations of Dynamics Characteristics of the Underwater Discharge System with Compressed Air,” Journal of the Korea Institute of Military Science and Technology, Vol. 7, No. 2, pp. 41-47, 2004.
- C. Jung and I. Park, “Analysis of the Dynamic Characteristics of the Underwater Discharge System using a Centrifugal Pump,” Journal of the Korea Institute of Military Science and Technology, Vol. 15, No. 5, pp. 594-600, 2012. https://doi.org/10.9766/KIMST.2012.15.5.594
- X. Zhang, et al., "2D Axismmetric CFD Simulation of Underwater Torpedo Launch Tube Flow," 2009 International Conference on Information Engineering and Computer Science, December, 2009.
- X. Zhang, et. al., "1D and CFD Co-Simulation Approach Basing on General Purpose Simulation Software," 2009 International Conference on Computational Intelligence and Software Engineering, December, 2009.
- X. Shi and J. Chen, "Simulation of Inner Ballistic of Underwater Weapon Based on Flow Field Numerical Calculation," Procedia Engineering, 2011 SREE Conference on Engineering Modeling and Simulation, Vol. 12, pp. 93-98, 2011.
- I. Park and C. Jung, “Analysis of the Dynamic Characteristics of the Underwater Discharge System using a Linear Pump,” Journal of the Korea Institute of Military Science and Technology, Vol. 8, No. 3, pp. 11-17, 2005.
- J. Watton, "Fluid Power Systems: Modeling, Simulation, Analog and Microcomputer Control," Prentice Hall, Inc. pp. 97-98, 1989.
- Herbert E. Merritt, "Hydraulic Control Systems," John Wiley & Sons, Inc. pp. 40-42, 1991.
- J. Song and J. Park, "An Introduction To Reliability Engineering," GS-intervision, pp. 226-227, 2013.