Closed Loop Dynamics of Nuclear Rocket Engines with Bleed Turbine Drive

1962 ◽  
Vol 14 (4) ◽  
pp. 371-379 ◽  
Author(s):  
Harold P. Smith
Keyword(s):  
Closed Loop ◽  
Rocket Engines ◽  
Loop Dynamics ◽  
Nuclear Rocket ◽  
Turbine Drive

Closed-Loop Dynamics of Nuclear Rocket Engines with Topping Turbine Drive

1964 ◽  
Vol 18 (4) ◽  
pp. 508-513
Author(s):  
Harold P. Smith
Keyword(s):  
Closed Loop ◽  
Rocket Engines ◽  
Loop Dynamics ◽  
Nuclear Rocket ◽  
Turbine Drive

Linearization of the Closed-Loop Dynamics of a Dual-Spin Spacecraft

1971 ◽  
Vol 8 (9) ◽  
pp. 938-945 ◽  
Author(s):  
KEVIN J. PHILLIPS
Keyword(s):  
Closed Loop ◽  
Loop Dynamics

scholarly journals DISCUSSION OF PERFORMANCE CALCULATIONS OF NUCLEAR ROCKET ENGINES

1959 ◽  
Author(s):  
E Semple
Keyword(s):  
Rocket Engines ◽  
Nuclear Rocket

scholarly journals A closed-loop dynamics analysis by Appel's method.

1986 ◽  
Vol 4 (1) ◽  
pp. 9-15
Author(s):  
Takahiro MASUDA ◽  
Akemi FUTAKAWA ◽  
Suguru ARIMOTO ◽  
Fumio MIYAZAKI
Keyword(s):  
Closed Loop ◽  
Dynamics Analysis ◽  
Loop Dynamics

Use of an on-line computer in the testing of prototype nuclear rocket engines

1968 ◽  
Author(s):  
W. CARLSON
Keyword(s):  
Rocket Engines ◽  
On Line ◽  
Nuclear Rocket

Effect of position of radial air injection plane on control of thermo-acoustic instability using active closed-loop method

2021 ◽  
pp. 107754632110501
Author(s):  
Nilaj N Deshmukh ◽  
Afzal Ansari ◽  
Praseed Kumar ◽  
Allen V George ◽  
Febin J Thomas ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Structural Damage ◽  
Closed Loop ◽  
Control Method ◽  
Heat Waves ◽  
Air Injection ◽  
Rocket Engines ◽  
Acoustic Instability ◽  
Loop Method ◽  
Short Time

Thermo-acoustic instability occurs when self-excited oscillations are generated due to the coupling between unsteady heat release and acoustics. This phenomenon can result in an increased rate of vibration, structural damage, and produces unwanted emissions. Thermo-acoustic instability occurs in rocket engines, gas turbines, combustors, and furnaces. When thermo-acoustic instability occurs, many modes are developed naturally at a specific point. Some waves are unstable and some are stable. So, to study this phenomenon the most unstable waves are considered and a technique is developed to suppress these unstable waves. A radial air injector as a closed-loop active control method is used for breaking the coupling between the heat waves and acoustics inside the 1D combustion chamber. The distance between the burner and the air injector is varied for the fixed position of the burner with respect to the Rijke tube, that is, x/L = 0.01125, 0.0075, and 0.00375. This closed-loop method works based on the feedback acquired from a microphone. The control method is built using DAQ and Arduino with the LabVIEW as interface for Arduino (LIFA). An air flow rate controller setup is developed to control and measure air required for suppressing the thermo-acoustic instability. Thermo-acoustic instability is effectively suppressed with the help of radial injection in the form of micro-jets at the downstream of the burner as the closed-loop controlling method. It is concluded that when the radial micro-jet air injection plane is closer to the burner head, the thermo-acoustic instability gets suppressed in a short time and with a lesser quantity of air.

Nonlinear control for modular multilevel converters with enhanced stability region and arbitrary closed loop dynamics

2021 ◽  
Vol 126 ◽  
pp. 106590
Author(s):  
Guacira Costa de Oliveira ◽  
Gilney Damm ◽  
Renato Machado Monaro ◽  
Luís F.N. Lourenço ◽  
Miguel Jimenez Carrizosa ◽  
...  
Keyword(s):  
Nonlinear Control ◽  
Stability Region ◽  
Closed Loop ◽  
Multilevel Converters ◽  
Loop Dynamics ◽  
Modular Multilevel Converters ◽  
Enhanced Stability

scholarly journals Multiconsensus of Nonlinear Multiagent Systems with Intermittent Communication

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Jie Chen ◽  
Guang-Hui Xu ◽  
Liang Geng
Keyword(s):  
Nonlinear Dynamics ◽  
Lyapunov Function ◽  
Multiagent Systems ◽  
Closed Loop ◽  
Sufficient Conditions ◽  
Control Parameters ◽  
Numerical Examples ◽  
Relative Information ◽  
Loop Dynamics ◽  
Intermittent Communication

Compared with single consensus, the multiconsensus of multiagent systems with nonlinear dynamics can reflect some real-world cases. This paper proposes a novel distributed law based only on intermittent relative information to achieve the multiconsensus. By constructing an appropriate Lyapunov function, sufficient conditions on control parameters are derived to undertake the reliability of closed-loop dynamics. Ultimately, the availability of results is completely validated by these numerical examples.

Exhaust gas treatment in testing nuclear rocket engines

1993 ◽  
Author(s):  
Herbert R. Zweig ◽  
Stanley Fischler ◽  
William R. Wagner
Keyword(s):  
Rocket Engines ◽  
Exhaust Gas ◽  
Gas Treatment ◽  
Nuclear Rocket
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