Some studies on the nonlinear dynamic response of shell-type structures.
Nonlinear dynamic response of thin walled shells of revolution
VIBRATION EFFECT↗
SEARCH · Engineering Papers
Results for “nonlinear systems”
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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Photon bunching in a laser at threshold.
He-Ne laser light intensity distribution cumulants for nonlinear oscillation threshold operation
GAS LASER↗
A Report on Session 12 IFAC Congress, 1966 (engeneering Philosophy of Optimization in the Problemof Analytical Design of Optima Controllers)
Summaries and abstracts on theory, design, optimization, and stability problems of nonlinear control systems
La Salle, J. P.↗
Perturbation of solutions of differential equations satisfying general boundary conditions
Perturbation of solutions of system of nonlinear differential equations under general linear boundary conditions
Lewis, D. C.↗
Drag reduction in a model of shear-flow turbulence.
Turbulent shear flow model for studying drag reduction in Burgers type system with nonlinearity
Tanner, R. I.↗
Quasi-Newton methods for nonlinear equations.
Algorithm containing all quasi-Newton methods to solve nonlinear equation systems
Zeleznik, F. J.↗
A new algorithm for suboptimal stochastic control.
M measurement optimal feedback control algorithm for stochastic discrete time systems, considering nonlinear plant, constrained controls, nonquadratic cost and simulations
Curry, R. E.↗
Region of acceptable motions.
Mathematical model for initial conditions of asymptotically stable nonlinear control system to estimate region of acceptable motions
Julich, P. M.↗
Absolute stability of dynamic system containing non-linear functions of several state variables.
Sufficient conditions derived for absolute stability of dynamic systems containing nonlinear functions of several state variables
Nahi, N. E.↗
PAP - Parametric Analysis Program
Computer program for parametric analysis of systems of nonlinear functions
Long, P. F.↗
Nonlinear analysis of generalized tracking systems.
Tracking systems synthesis and performance analysis based on continuous Markov processes theory, particularly Fokker-Planck equation
Lindsey, W. C.↗
Successive linearization and nonlinear filtering
Optimal nonlinear filtering for nonlinear dynamic system subjected to additive white Gaussian noise with corrupted observations, using successive linearization scheme
Kau, S.↗
A new algorithm for suboptimal stochastic control
M measurement optimal feedback control algorithm for stochastic discrete time systems, considering nonlinear plant, constrained controls, nonquadratic cost and simulations
Curry, R. E.↗
An upper bound on the estimation error in the threshold region
Weak noise and threshold effects on estimation error for nonlinear PM systems
Timor, U.↗
Analysis of a hybrid phase-locked loop for improved phase estimation
Digital communication hybrid phase locked loop nonlinear feedback system with modulation and carrier components enhancing phase estimation
Stewart, T. L.↗
Optimization of nonlinear characteristics
Optimal characteristics for single-input single- output memoryless time invariant nonlinear dynamic systems
Desoer, C. A.↗
Optimal reliability of a complex system
Optimal reliability of system with nonlinear constraints, using mathematical model and sequential unconstrained minimization technique
Fan, L.-T.↗
Tracking system study
A digital computer program was generated which mathematically describes an optimal estimator-controller technique as applied to the control of antenna tracking systems used by NASA. Simulation studies utilizing this program were conducted using the IBM 360/91 computer. The basic ideas of applying optimal estimator-controller techniques to antenna tracking systems are discussed. A survey of existing tracking methods is given along with shortcomings and inherent errors. It is explained how these errors can be considerably reduced if optimal estimation and control are used. The modified programs generated in this project are described and the simulation results are summarized. The new algorithms for direct synthesis and stabilization of the systems including nonlinearities, are presented.
Dennis, A. R.↗