Browsing Aerospace Engineering by Title
Now showing items 94113 of 190

Generalization of the collision cone approach for motion safety in 3D environments
(Springer, 201202)Avoidance of collision between moving objects in a 3D environment is fundamental to the problem of planning safe trajectories in dynamic environments. This problem appears in several diverse fields including robotics, air ... 
A greedy random adaptive search procedure for multirendezvous mission planning
(Univelt, Inc., 201501)The paper proposes a new algorithm to optimize a sequence of rendezvous maneuvers by a spacecraft with multiple targets. The algorithm consists of two phases: the first phase generates feasible solutions of the problem ... 
Highorder incompressible Navierstokes equations solver for blood flow
(Wichita State University, 201207)A highorder finite difference solver was written to solve the incompressible NavierStokes (NS) equations and was applied to analyze the blood flow. First, a computer code was written to solve incompressible Navier Stokes ... 
A hybrid scheme for the numerical simulation of shock/discontinuity problems
(Taylor & Francis, 2011)To address accuracy issues for direct numerical simulation, a hybrid scheme based on the weighted compact scheme (WCS) and weighted essentially nonoscillatory (WENO) scheme is developed. The new hybrid method incorporates ... 
Ice particle trajectory simulation
(Wichita State University, 200512)Large ice particles shed from an airframe can cause damage to downstream aerodynamic surfaces and aft mounted engines. A simulation tool was developed to compute the trajectories of shed ice particles and determine the ... 
Inplane shear response of laminated composites at high strain rates
(Wichita State University. Graduate School., 20060428) 
Kinetics of prepreg epoxy resin curing for aircraft body repair
(Wichita State University. Graduate School, 20140425)Curing is the crosslinking of polymer chains, which results in toughening of polymer material and it is widely used in bonded composite repair for aerospace components. The main objective of this project is to analyze ... 
Load rate effects on Interlaminar fracture toughness of composite materials
(Wichita State University. Graduate School, 20090501)The energy dissipation due to the failure of composites is of particular interest for crash applications involving dynamic loading. Separation of layers or delamination which can occur in opening (modeI) is one of the key ... 
Load rate effects on the crush response of laminated corrugated beams
(Wichita State University. Graduate School, 20100423)This experimental study addresses the progressive crushing responses of laminated corrugated beams fabricated using Newport NB321/7781 Eglass prepreg material. Stacking sequences of [0]n and [45]n where n=4,8 and 12 have ... 
Local bending containment in impact damaged sandwich panels
(Wichita State University. Graduate School., 20070427)A repair technique involving the containment of local bending of sandwich facesheet by strategically filling honeycomb core cells has been explored to improve the damage tolerance of impact damaged sandwich panels. The ... 
Local bending containment in sandwich panels with subsurface core damage
(Wichita State University, 200805)The compressive residual strength and behavior of impact damaged sandwich panels are governed by the amount of nonvisible core damage underneath the facesheets. The failure modes under inplane compressive loading are ... 
Low thrust orbitraising using nonsingular orbital elements and proximity quotient approach
(Univelt, Inc., 2015)Recent years have shown a growing interest in the space industry in allelectric satellites. Mission designers analyzing the optimal deployment options for all electric satellites need to consider three important metrics: ... 
Lowthrust orbitraising trajectories considering eclipse constraints
(Univelt, Inc., 2015)Manyrevolution electric orbitraising trajectories make numerous passages through the shadow of the Earth. The paper presents a new algorithm to determine the minimumtime trajectory of the spacecraft during orbitraising. ... 
Minimizing errors from linear and nonlinear weights of WENO scheme for broadband applications with shock waves
(Elsevier, 20130329)Improvements in the numerical algorithm for the dynamics of flows that involve discontinuities and broadband fluctuations simultaneously are proposed. These two flow features suggest numerical strategies of a paradoxical ... 
Minimumfuel electric orbitraising of telecommunication satellites subject to time and radiation damage constraints
(IEEE, 20140604)The capability of a Geostationary satellite to perform electric orbitraising enables the development of allelectric satellites. Key challenges to the realization of electric deployment of satellites to the Geostationary ... 
A model following inverse controller with adaptive compensation for general aviation aircraft
(200705)The theory for an adaptive inverse flight controller, suitable for use on General Aviation aircraft, is developed in this research. The objectives of this controller are to separate the normally coupled modes of the basic ... 
Models and methods for bird strike load predictions
(Wichita State University, 200712)Typical bird shapes used in numerical bird strike analyses include a number of primitive geometries, such as the right circular cylinder, hemispherical cylinder, sphere and ellipsoid. There are also some simplifying ... 
Modified state observer based adaptation of a general aviation aircraft  simulation and flight test
(American Institute for Aeronautics and Astronautics, 201401)This paper presents some issues encountered while flight testing a Model Reference Adaptive dynamic inverse controller (MRAC), on a General Aviation (GA) flybywire test bed. Adaptation was replaced with a Modified ... 
Modified State Observer based adaptive control law design for the Black Kite MAV
(IEEE, 20140604)This paper presents the design and simulation of a Modified State Observer (MSO) based adaptive control law, developed by Balakrishnan, for a Micro Aerial Vehicle (MAY). The MSO allows higher adaptive gains than other ... 
Modified state observer based adaptive control law for general aviation and micro aerial vehicles
(Wichita State University, 201407)The aim of this research is to assess the capability of Modified State Observer (MSO) based adaptations for use in controlling the longitudinal flight dynamics of a General Aviation (GA) type airplane and a Micro Aerial ...