Abstract A flight test campaign for system identification is a costly and time-consuming task. Models derived from wind tunnel experiments CFD calculations must be validated and/or updated with data to match the real aircraft stability control characteristics. Classical maneuvers are mostly one-surface-at-a-time inputs need performed several times at each condition. Various methods defining ver...

The lexical frequency effect in picture naming is generally assumed to constitute a signature of lexical access. Lexical frequency, however, is correlated with other variables, like concept familiarity, that can produce effects similar to those of lexical frequency in picture naming tasks. In this study, a delayed picture naming task was employed to address the hypothesis that the frequency eff...

We theoretically analyze the quantum noise of signal-recycled laser interferometric gravitational-wave detectors with additional input and output optics, namely frequency-dependent squeezing of the vacuum state of light entering the dark port and frequency-dependent homodyne detection. We combine the work of Buonanno and Chen on the quantum noise of signal-recycled interferometers with ordinary...

The study is concerned with the development of a new technique for the detection and location of nonlinearities in MDOF structural systems where multiple nonlinear components may exist due to different faulty conditions. The basis is a concept known as Nonlinear Output Frequency Response Functions and associated properties. The technique determines the location of nonlinear components in MDOF s...

The choice of the input signals has impact on the nonparametric frequency response function (FRF) measurements of a nonlinear MIMO system. It is shown that Gaussian noise, periodic noise, and random multisines are equivalent, yielding in the limit the same linear approximation to a nonlinear MIMO system. Even in the noiseless case, variability of the FRF is observed due to the presence of the n...

A review of the relationship between the frequency response function of linear system and the DFT of the input and output signals show that the output DFT is a sum of two terms. The first term contain the FRF multiplied with the input DFT and the second term capture the effect when the system is not operating in a periodic fashion. The utilization of these two terms when performing non-parametr...