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System Identification: A Practical Tool from a Fiddler's Paradise

From Spectral Dynamics, Inc.

Measuring the frequency response of a linear system is a typical first step in characterizing it's
dynamic behavior. Requirements in control design and signal processing often demand
information beyond the frequency response. Underlying differential and/or difference
equations provide a concise mathematical description defining all other dynamic behavior.
The task of estimating these equations from measurements of input and output signals is
referred to in the control literature as the process of System Identification (SID). Despite the
complexity of the signal processing involved, the complete identification process can be
integrated into an easy to use GUI based application.

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Topics of Interest

The content of this book is closely related to system theory, a scientific discipline devoted to the study of mathematical properties of various physical systems. System theory has become an extensive...

This chapter presents a general overview of the frequency-response method for system identification, which is the focus of this book and is implemented in CIFER . We also present results of the...

Overview This chapter introduces the basic concepts of single-input/single-output (SISO) frequency-response identification theory. An understanding of these concepts is an important prerequisite to...

2.2 Dynamic Systems A dynamic system has behavior that evolves over time. This behavior is commonly represented by differential equations if the system is of the continuous-time type or by...

Overview System identification, as it is termed today, is a scientific discipline that provides answers to the age-old inverse problem of obtaining a description in some suitable form for a system,...