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Application of Classical Control Theory to Off-Design Operations of a Fluid Loop System
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English
Abstract
Off-design operation problems of a cold plate row and of a space radiator row, encountered in fluid loop control, are solved to find possible inlet/outlet temperatures or to specify a required flow rate. Solutions of the problems are given in the form suitable for numerical computations and are graphically shown in the figures for various combinations of control variables. Mathematical analyses are then made to yield transfer functions of a cold plate and of a space radiator. They are expressed as a second-order delay system, mainly dependent on the heat transfer unit number and the heat capacity rate ratio. The expressions are generalized so as to be applicable to a series of cold plates or space radiators. A further analysis based on such generalized transfer functions is made to develop a method of feedback/feedforward control. Numerical results of the analysis are summarized in the table and also are displayed in the figures. Presented are:
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1)
the proportional gain and the reset time to actually be used in PI (Proportional-Integral) control and
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2)
coefficient values of the transfer function proposed for feedforward control. Stability conditions are also discussed and are expressed in inequalities.
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Citation
Furukawa, M., "Application of Classical Control Theory to Off-Design Operations of a Fluid Loop System," SAE Technical Paper 941349, 1994, https://doi.org/10.4271/941349.Also In
References
- Russell, L.D. Chapman, A.J. “Analytical Solution of the 'Known-Heat-Load' Space Radiator Problem” Journal of Spacecraft and Rockets 4 3 Mar. 1967 311 315
- Furukawa, M. “Design and Off-Design Performance Calculations of Space Radiators” Journal of Spacecraft and Rockets 18 6 Nov.-Dec. 1981 515 526
- Wanous, D.J. Clausen, O.W. “Distributed Parameter Space Radiator Dynamic Analysis” Progress in Astronautics and Aeronautics 23 Thermophysics: Applications to Thermal Design of Spacecraft Bevans, J.T. Academic Press New York, NY Mar. 1970 384 404
- Fillipi, F. Ledford, O.C Vallerani, E. “An Experiment Cooling Loop for Spacelab Payloads” ASME 78-ENAs-29, 8th Intersociety Conference on Environmental Systems San Diego, CA July 1978
- Marchis, V. “Thermal Fluid Loop for Space Applications - A Linear Control System Stability Approach” Proceedings of Spacecraft Thermal and Environmental Control Systems Symposium Munich, Germany Oct. 1978 425 429 Nov. 1978
- Dell'Amico, S. Sessions, B. “Analysis of Fluid Loops Including Transport Time-Lag Simulation” Proceedings of Spacecraft Thermal and Environmental Control Systems Symposium Munich, Germany Oct. 1978 213 222 Nov. 1978
- Marchis, V. “Control Philosophy Concepts in Complex Space Heat Rejection Systems” SAE 820864 , 12th Intersociety Conference on Environmental Systems San Diego, CA July 1982
- Marchis, V. Nervegna, N. “Adaptive Control of Thermal Fluid Loops for Space Applications” Proceedings of International Symposium on Environmental and Thermal Systems for Space Vehicles Toulouse, France Oct. 1983 319 327 Dec. 1983
- Klotz, H. Marke, K. “An Active Modular Temperature Gradient Control System” Proceedings of Spacecraft Thermal and Environmental Control Systems Symposium Munich, Germany Oct. 1978 439 448 Nov. 1978
- Nikanpour, D. Ciampolini, F. Stangerup, P. “Thermo-Hydraulic Simulation and Regulation of Active Thermal Control Using ESACAP Software” Proceedings of 4th European Symposium on Space Environmental and Control Systems Florence, Italy Oct. 1991 331 339 Dec. 1991
- Furukawa, M. “Analytical Approach to Modulation and Control of Pumped Liquid Loops” Proceedings of 4th European Symposium on Space Environmental and Control Systems Florence, Italy Oct. 1991 381 389 Dec. 1991
- Furukawa, M. “Advanced Computational Analyses for Design and Control of Pumped Liquid Loop Systems” SAE 932052 , 23rd International Conference on Environmental Systems Colorado Springs JuIy 1993
- Shinskey, F.G. “Feedforward Control Applied” ISA (Instrument Society of America) Journal 10 11 Nov. 1963 61 65
- Furukawa, M. “Practical Expressions for Thermodynamic and Transport Properties of Commonly Used Fluids” Journal of Thermophysics and Heat Transfer 5 4 Oct.-Dec. 1991 524 531
- Furukawa, M. Empirical Expressions Selected as a Common Basis of Heat-Transfer and Pressure-Drop Calculations” Transactions of the JSASS (Japan Society for Aeronautics and Space Sciences) 36 113 Nov. 1993 188 208
- Jacobs, O.L.R “Introduction to Control Theory” Oxford University Press London, UK 1974
- Takahashi, Y. “System and Control (in Japanese)” 2nd 1 2 Iwanami Book Company Tokyo, Japan Apr. 1981
- Koppel, L.B. “Dynamics of a Flow-Forced Heat Exchanger” Industrial and Engineering Chemistry Fundamentals 1 2 May 1962 131 134
- Larson, P.S. Yang, W. “Frequency Responses of Multipass Shell-and-Tube Heat Exchangers to Timewise-Variant Flow Perturbations” ASME 64-HT-18, AIChE-ASME Heat Transfer Conference Cleveland, OH Aug. 1964
- Gartner, J.R. Harrison, H.L. “Frequency Response Transfer Functions for a Tube in Crossflow” ASHRAE Transactions 69 1841 1963 323 330
- Myers, G.E. Mitchell, J.W. “A Method of Estimating Cross-Flow Heat Exchanger Transients” ASHRAE Transactions 71 1933 1965 225 230
- Graham, G.E. “Analyzing Process-Control Loops” Chemical Engineering 83 16 Aug. 2 1976 72 78
- Kuwata, R. “An Improved Ultimate Sensitivity Method and PID; I-PD Control Characteristics (in Japanese)” Transactions of the Society of Instrument and Control Engineers 23 3 Mar. 1987 26 33