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Showing 1 to 20 of 132 for “"Feed rate"”.
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System Characterization, Control and Optimal Feed -Rate Scheduling for High -Speed Machining and Nano Positioning
Finally, a provably-optimal feedrate-optimization (trajectory planning) algorithm is developed to exploit the capabilities of a given physical motion system. System capabilities and process requirements are modeled and formulated as constraints to drive the algorithm. The resulting trajectory makes …
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The effect of feed rate and cracking time on carbon formation during the catalytic cracking of petroleum hydrocarbons
… was undertaken to determine the effect of the feed rate and the length of the cracking period on the carbon formation on the catalyst. A vertical, fixed-bed, externally heated reactor was constructed. The reactor contained a bed of synthetic silica-alumina Socony-Vacuum bead catalyst. The …
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Development of temperature and feed rate controllers for a hybrid thermoplastic forming of surgical blades from bulk metallic glass
… process settings including temperature and feed rate. This error is critical to the BMG thermoplastic forming since both parameters can significantly affect the type of deformation of BMG, which ultimately result in blade edge shape. In this research, temperature control, using Fuzzy logic …
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Effect of Feed Rate and Solid Retention Time (SRT) on Effluent Quality and Sludge Characteristics in Activated Sludge Systems Using Sequencing Batch Reactors
… are the Solid Retention Time (SRT) and the substrate loading rate. The latter is related to the two basic designs in activated sludge bioreactor configurations: the Plug Flow Reactor (PFR) and the Completely Stirred Tank Reactor (CSTR). PFR systems have a high substrate loading rate, whereas …
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Investigation of Melt Electrical Conductance in Food Extrusion
Increase in both the feed rate and the screw speed decreased the mean residence time but the feed rate effect was more pronounced. The specific feeding load, barrel fill and flow profile were affected by the feed rate and the screw speed in opposite directions. Spread of the normalized RTD …
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Optimal control of fed-batch fermentation processes
… maximum principle to determine an optimal feed rate profile. This often results in a singular control problem and an open loop control structure. The singular feed rate is the optimal feed rate during the singular control period and is used to control the substrate concentration in the …
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Machinability study of particle reinforced aluminium metal matrix composites
… cutting speeds varying from 75 to 700m/min and feed rates from 0.1 to 0.4 mm/rev with constant depth of cut of 0.5 mm. The main wear mechanism of machining these Al MMC materials is abrasion by the reinforcing particles and the primary type of tool wear is flank wear. Linear regression …
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Probing Control of Glucose Feeding in Escherichia coli Cultivations
… is glucose. In fed-batch processes the glucose feed rate can be manipulated to avoid acetate formation, but most feeding strategies require considerable process knowledge to handle process variations. On-line measurements for the relevant process variables are far from being standard which …
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Effect of operating variables on composition of overhead vapors and residue from a continuous flash distillation for the system methanol-water at atmospheric and sub-atmospheric pressures
… conditions of temperature, agitation, and rate of feed at a total pressure of 500 millimeters of mercury, absolute. The distillation took place in a nine inch diameter, electrically-heated, controlled temperature and pressure, cylindrical still 14 inches high. The liquid phase was agitated …
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Parametric study and simulation of microbubble column flotation
… and btu), while the independent variables were feed solids content, collector dosage, frother dosage, feed rate, aeration rate, and wash water rate. The most important operating parameters in order of significant were found to be aeration rate, feed rate, frother dosage and wash water rate. The …
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The effect of machine and material parameters on rare earth roller separation
… material concentration, splitter position and feed rate. Experimental design for the tests is presented. Separation performance appears to be dependent on splitter position, a subjective parameter determined by the characteristics of the machine. The separation process was less sensitive to …
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Performance and Total PM Emission Factor Evaluation of Expendable Abrasives
… matter (PM) and metals. Spent abrasive generated from this process may be hazardous in nature. With increasing concern on health effects due to silica emissions from sand, use of alternative materials is suggested by health and regulatory agencies. The objective of this research was to …
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Continuous column flotation of ultrafine coal using microbubbles
… operating variables such as time, bubble size, feed rate, feed point, feed percent solids, column height, bubble number concentration, make-up water addition and countercurrent wash water addition. The results show that i) fine air bubbles are Inherently better suited for floating small …
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Extremum-Seeking Control of Industrial-Scale Fermentation Processes
… both pertaining to perturbation-based control strategies in industrial fed-batch fermentation processes. The first paper describes a new control strategy for avoiding overflow metabolism in the exponential growth phase of a fermentation, based on analysis of the frequency spectrum of the …
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Computer control of chemical process plants with special reference to distillation
… and in the face of a step change in the feed rate. A method of extending linear filtering theory to highly nonlinear systems with very nonlinear measurement functional relationships has been proposed and tested by simulation on binary distillation. The simulation results have proved that …
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Scale prevention in sea water evaporators: Part I design and construction
… of evaporator scale, using untreated feed, by which a comparison could be made with all subsequent tests. The pretreatment plant involved the operation of two pieces of equipment, the feedwater holding tank and the aerator tank. The procedure that was followed in this calibration was …
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Abrasive Blasting Process Optimization: Enhancing Productivity, and Reducing Consumption and Solid/Hazardous Wastes
… at establishing relationships between applied feed rates and resulting productivity and consumption rates. It is clear that the high costs of disposal of the multimedia wastes generated by the dry abrasive blasting processes are of increasing concern in the future of shipbuilding industry. In …
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Evaluation of Productivity, Consumption, and Uncontrolled Total Particulate Matter Emission Factors of Recyclable Abrasives
… the influences of blast pressure and abrasive feed rate, two most critical parameters on productivity, consumption and emission factors. Two and three dimensional models were obtained using multiple linear regression techniques to express productivity, consumption and TPM emission factors in …
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Perturbation-based Control of Industrial Fed-batch Bioprocesses
… thesis concerns control of the microbial substrate uptake rate by manipulation of the feed rate of liquid substrate to the bioprocess. This is an important parameter for improving process yields, as too low feed rates cause starvation of the microorganisms while too high rates lead to …
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