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NASA NTRS · 19640024661

Rapid methods for the solution of automatic control equations.

Moore, J. W.·Oldenburger, R.
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Abstract

Iterative procedure for the solution of equations in the design and analysis of automatic control systems

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Moore, J. W., Oldenburger, R.. 1963-09-01. Rapid methods for the solution of automatic control equations.. https://ntrs.nasa.gov/citations/19640024661

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NASA NTRS1964

Experimental Evaluation of Steady-State Control Properties of an Electron-Bombardment Ion Thrustor

Examined in this report are the experimental steady-state gains, or changes, in beam-current output with changes in thrustor inputs for a 10-centimeter-diameter electron-bombardment ion thrustor. A general leveling off of beam current as a function of an input variable was found at the upper range of each variable, At the design operating point, the filament-heating current exhibited the greatest sensitivity, or percentage beam-current output change for a percentage change in the input (2 to 4). Accelerator voltage showed the least effect (0.04) while discharge voltage, magnetic field, and neutral propellant flow exhibited about the same sensitivity (0.4 to 0.5). Some effects of nonlinearity are shown that may require consideration in the design of a closed-loop control system.

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