Johan Schoukens, Rik Pintelon, Yves Rolain's Mastering System Identification in 100 Exercises PDF

By Johan Schoukens, Rik Pintelon, Yves Rolain

ISBN-10: 0470936983

ISBN-13: 9780470936986

ISBN-10: 1118218531

ISBN-13: 9781118218532

Systems id is a basic time period used to explain mathematical instruments and algorithms that construct dynamical types from measured facts. learning method id in a hundred workouts takes readers step-by-step via a chain of MATLAB routines that educate the right way to degree and version linear dynamic platforms within the presence of nonlinear distortions from a pragmatic perspective. each one workout is by way of a brief dialogue illustrating what classes will be discovered by means of the reader.

The ebook, with its learn-by-doing procedure, additionally includes:

  • State-of-the-art process id equipment, with either time and frequency area method identity methods?including the professionals and cons of each

  • Simple writing kind with a variety of examples and figures

  • Downloadable author-programmed MATLAB records for every exercise?with exact solutions

  • Larger initiatives that function strength assignments

Covering either vintage and up to date size and deciding on tools, this booklet will entice working towards engineers, scientists, and researchers, in addition to master's and PhD scholars in electric, mechanical, civil, and chemical engineering.

Chapter 1 identity (pages 1–27):
Chapter 2 iteration and research of Excitation indications (pages 29–53):
Chapter three FRF Measurements (pages 55–90):
Chapter four id of Linear Dynamic platforms (pages 91–136):
Chapter five top Linear Approximation of Nonlinear structures (pages 137–181):
Chapter 6 Measuring the simplest Linear Approximation of a Nonlinear procedure (pages 183–238):
Chapter 7 identity of Parametric types within the Presence of Nonlinear Distortions (pages 239–254):

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Extra resources for Mastering System Identification in 100 Exercises

Example text

Hint: Make use of the fact that U(k) = U(N- k), and xy + xy = 2real(ry). b on top of each other. Analyze the number of operations to calculate a (sum or) sines directly in the time domain, or using the FFT routine. How does this answer depend upon the number of generated harmonics in the signal? □ Observations (see Figure 2-6). Both results coincide completely after proper scaling of the amplitude by l/N. This is again due to the scaling of the MATLAB IFFT command. 5 Figure 2-6 0 1 e 0< _,1 ■ e e ■ 9 0 ® .

Observe that the frequency resolution is set by the window length NTS of the previous step. The DFT can be calculated rapidly using the MATLAB® instruction: U = f f t (u), and the inverse transform is given b y u = i f f t ( U ) . Note that the scaling factor S of the MATLAB® f f t routine is S = 1. The f f t and i f f t are calculated fastest if the length of u and U is N = 2". However, the MATLAB® implementations allow also for signal lengths that are different from this optimal value, while the calculation time is still very small.

The AIC method makes it possible to select the model on the test data without using a validation set. In practice it is however still advisable to test the final model on a validation test to verify if the model can explain also fresh data that were not used to build it. 5? Further reading In this section we learned that the choice of the model complexity is an important issue. Too simple models lead to bias errors, while models with too many parameters suffer from an increased variability. Model selection tools balance the bias and variance errors.

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Mastering System Identification in 100 Exercises by Johan Schoukens, Rik Pintelon, Yves Rolain

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