Identification of Bare-Airframe Dynamics from Closed-Loop Data Using Multisine Inputs and Frequency Responses

Amethod is presented for computing multiple-input multiple-output frequency responses of bare-airframe dynamics for systems excited using orthogonal phase-optimized multisines and including correlated data arising from control mixing or feedback control. The estimation was posed as the solution to an underdetermined system of linear equations, for which additional information was supplied using interpolation of the frequency responses. A simulation model of the NASA T-2 aircraft having two inputs and two outputs was used to investigate the method in the open-loop configuration and under closed-loop control. The method was also applied to flight test data from the X-56A aeroelastic demonstrator having five inputs and ten outputs and flying under closed-loop control with additional control allocation mixing. Results demonstrated that the proposed method accurately estimates the bare airframe frequency responses in the presence of correlated data from control mixing and feedback control. Results also agreed with estimates obtained using different methods that are less sensitive to correlated inputs

Survival of the Fittest: An Examination of the Louisiana Science Education Act

(Excerpt) This Note asserts that the Louisiana Science Education Act is likely to be found unconstitutional under the Establishment Clause of the United States Constitution. Part I will examine the progression and development of the failed creationist challenges to evolution, as well as provide the relevant framework used by the courts to evaluate Establishment Clause challenges to public school curricula. Part II will set out the social context and history of the LSEA itself. Part III will then proceed to examine the LSEA and its background under the framework established in Part I to show that it is unconstitutional

Survival of the Fittest: An Examination of the Louisiana Science Education Act

(Excerpt) This Note asserts that the Louisiana Science Education Act is likely to be found unconstitutional under the Establishment Clause of the United States Constitution. Part I will examine the progression and development of the failed creationist challenges to evolution, as well as provide the relevant framework used by the courts to evaluate Establishment Clause challenges to public school curricula. Part II will set out the social context and history of the LSEA itself. Part III will then proceed to examine the LSEA and its background under the framework established in Part I to show that it is unconstitutional