scholarly journals Numerical Study of Energy Deposition Requirements for Aerodynamic Control of Hypersonic Vehicles

2008 ◽  
Author(s):  
Nicholas Bisek ◽  
Iain Boyd ◽  
Jonathan Poggie
Keyword(s):  
Energy Deposition ◽  
Numerical Study ◽  
Hypersonic Vehicles ◽  
Aerodynamic Control

scholarly journals Numerical Study of Plasma-Assisted Aerodynamic Control for Hypersonic Vehicles

2009 ◽  
Vol 46 (3) ◽  
pp. 568-576 ◽  
Author(s):  
Nicholas J. Bisek ◽  
Iain D. Boyd ◽  
Jonathan Poggie
Keyword(s):  
Numerical Study ◽  
Hypersonic Vehicles ◽  
Aerodynamic Control

Numerical study on increasing mass flow ratio by energy deposition of high frequency pulsed laser

2013 ◽  
Vol 25 (7) ◽  
pp. 1715-1718 ◽  
Author(s):  
王殿恺 Wang Diankai ◽  
洪延姬 Hong Yanji ◽  
李倩 Li Qian
Keyword(s):  
Mass Flow ◽  
High Frequency ◽  
Energy Deposition ◽  
Numerical Study ◽  
Pulsed Laser ◽  
Flow Ratio ◽  
Mass Flow Ratio

scholarly journals Disturbance Observer-Based Adaptive Control of Hypersonic Vehicles with Constrained Actuators

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Guan Wang ◽  
Li Li ◽  
Weihua Li ◽  
Huajun Zhou ◽  
Changbo Ma ◽  
...  
Keyword(s):  
Disturbance Observer ◽  
Input Saturation ◽  
Adaptive Controller ◽  
Hypersonic Vehicles ◽  
Control Allocation ◽  
External Disturbances ◽  
Nonlinear Disturbance Observer ◽  
Aerodynamic Control ◽  
Actuator Constraints ◽  
Control Surfaces

This study investigates an adaptive controller for the flexible air-breathing hypersonic vehicles (AHVs) subject to external disturbances and actuator constraints. The combination of nonlinear disturbance observer and adaptive mechanism is exploited to design an adaptive controller for each subsystem. For the velocity subsystem, an auxiliary system is employed to handle the scramjet input saturation issue. For the altitude subsystem, the magnitude/rate constraints and the dynamics of aerodynamic control surfaces are addressed by the control allocation module. Simulations show the effectiveness of the proposed control.

scholarly journals Calorimetric Non-Destructive Assay of Large Volume and Heterogeneous Radioactive Waste Drums

2020 ◽  
Vol 225 ◽  
pp. 06003
Author(s):  
W. R. Kubinski ◽  
C. Carasco ◽  
D. Kikola ◽  
C. Mathonat ◽  
D. Ricard ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Large Volume ◽  
Energy Deposition ◽  
Particle Flux ◽  
Background Radiation ◽  
Numerical Study ◽  
High Energy ◽  
Beta Emitters ◽  
Non Destructive ◽  
Waste Drums

The EU-CHANCE project aims at the issue of the characterization of conditioned radioactive waste (CRW) and one objective of CHANCE is to focus on: Calorimetry as a comprising non-destructive technique to reduce uncertainties on the inventory of radwaste containing shielded and hidden material difficult to be measured by other means. A MCNP6-based numerical study comprising the particle flux out of a 200L mock-up drum in a Large Volume Calorimeter (LVC) currently manufactured by KEP Nuclear (France) will be presented and discussed. For the analyses, the particle flux and energy deposition in each layer of the calorimeter were determined. The results yield that a significant fraction of the radiation would leave the system and not contribute to the measurable heat deposition. The expected energy deposition is obtained and cumulated for each layer over the whole energy range revealing the fraction of particles actually escaping the LVC calorimeter. While this escape fraction needs and can be determined, the LVC is a very suitable apparatus for the anticipated experiments on large and heterogeneous waste drums that possibly contain deeply buried beta-emitters (e.g. Sr/Y-90) or shielded alpha-sources hidden inside the drum with a significant level of gamma and neutron radiation background radiation. The high-energy part of this gamma and neutron flux may even reach the reference chamber of the calorimeter and deposit some energy there, compromising the calibration and may cause a double-bias.

scholarly journals Comparative numerical study of efficiency of energy deposition in femtosecond microfabrication with fundamental and second harmonics of Yb-doped fiber laser

2011 ◽  
Author(s):  
Alexandr Dostovalov ◽  
Sergey Babin ◽  
Mandana Baregheh ◽  
Mykhaylo Dubov ◽  
Vladimir Mezentsev
Keyword(s):  
Fiber Laser ◽  
Energy Deposition ◽  
Numerical Study

Numerical Study of Nonuniform Energy Deposition and Flowfield in Discharge-Pumped XeCl Excimer Laser

1997 ◽  
Vol 36 (Part 1, No. 9A) ◽  
pp. 5709-5713 ◽  
Author(s):  
Qifeng Zhu ◽  
Go Imada ◽  
Wataru Masuda ◽  
Kiyoshi Yatsui
Keyword(s):  
Excimer Laser ◽  
Energy Deposition ◽  
Numerical Study ◽  
Xecl Excimer Laser
Sign in / Sign up

Export Citation Format

Share Document