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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Hybrid models are powerful predictors of performance in Water Resource Recovery Facilities (WRRFs). When used in controllers, hybrid models can help inform manipulated variable setpoints in feedforward controllers. This idea was tested for chlorine disinfection and ammonia-based aeration control.
One or more embodiments relate to a method for controlling fiber growth and fiber diameter in a laser heated pedestal growth (LHPG) system so as to provide long, continuous single-crystal optical fibers of uniform diameter. The method generally provides three independent parameter feedback controls to control the molten zone height, laser power, and fiber drawing rates simultaneously in order to reduce the mismatch between instantaneous diameter changes and current diameter. The method permits the growth of fibers with non-uniform diameters along the fiber's length. The method also provides the capability to stop the LHPG system, remove the exhausted pedestal feedstock with a second pedestal feedstock, and restart the LHPG system to provide a continuous fiber.
Adaptive state vector control, section 2, modes of control
Adaptive state vector control - section 6, the theory of average power optimal control of linear systems
Adaptive state vector control - section 5, computational solution of optimal control problems
Optimal control functions of minimum settling time and fuel consumption for single-axis attitude control systems
Modern optimal control theory relation to manual control systems emphasizing human element
Manual three-axis satellite attitude control, using vector reticle and control action display concepts
Nose-mounted control-system jets in roll-control positions effect on aerodynamics of space vehicle
High subsonic wind tunnel study of stability and control characteristics of antitank missile with ram-pressure jet controls on ring tail
Transonic wind tunnel study of control span and large wing-tip nacelles results on effectiveness of spoiler-slot-deflector controls on fighter aircraft
Effect of body nose blunting, control planform area, and leading edge bluntness on aerodynamic control of semivertex cone at hypersonic speed
Two axis compensatory manual control systems with compatible integrated display and control
Linear and nonlinear control systems via state variable feedback with applications in nuclear reactor control
Measurement and display of control information using remote manipulation and manual control techniques
Human controller behavior in multivariable control systems
Control of water moderated nuclear reactor using neutron absorbing helium 3 gas control elements