Applications of mixed H2 and H∞ input design in identification

• The objective of this contribution is to quantify benefits of optimal input design compared to the use of standard identification input signals, e.g. PRBS signals for some common, and important, application areas of system identification. Two benchmark problems taken from process control and control of flexible mechanical structures are considered. We present results both when the design is based on knowledge of the true system (in general the optimal design depends on the system itself) and for a practical two step procedure when an initial model estimate is used in the design instead of the true system. The results show that there is a substantial reduction in experiment time and input excitation level. A discussion on the sensitivity of the optimal input design to model estimates is provided.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)

Nyckelord

Identification

Input design

Mechanical systems

Process control

Application area

Bench-mark problems

Excitation levels

Identification input

Mechanical structures

Mixed H

Model estimates

Optimal design

Optimal input design

PRBS signals

Substantial reduction

Two-step procedure

Automation

Control

Design

Identification (control systems)

Optimization

SRA - ICT

SRA - Informations- och kommunikationsteknik

Publikations- och innehållstyp

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