Robustness Margins Separating Process Dynamics Uncertainties

Per-Ola Larsson; Tore Hägglund

Robustness Margins Separating Process Dynamics Uncertainties

Institutionen för reglerteknik

Forskningsoutput: Konferensbidrag › Konferenspaper, ej i proceeding/ej förlagsutgivet › Peer review

Sammanfattning

In controller design, not only set-point tracking and disturbance rejection can be considered, also robustness towards process uncertainties is a key issue. In this paper, new robustness measures that divide uncertainties into dead time and non-dead time uncertainties, are presented. It is shown, to
the contrary of classic measures such as phase/gain/dead time margins, to guarantee stability towards simultaneous process changes, but at the same time being more flexible and less conservative than the robust control framework. The measures depend on extended sensitivity functions and are well illustrated in a Nyquist diagram giving valuable insight. Procedures to
calculate the robustness margins are presented and examples are given.

Originalspråk	engelska
Status	Published - 2009
Evenemang	European Control Conference, 2009 : ECC´09 - Budapest, Ungern Varaktighet: 2009 aug. 23 → 2009 aug. 26

Konferens

Konferens	European Control Conference, 2009
Land/Territorium	Ungern
Ort	Budapest
Period	2009/08/23 → 2009/08/26

Ämnesklassifikation (UKÄ)

Reglerteknik

1 Avslutade

PID Control
Robertsson, A., THEORIN, A., Bernhardsson, B., Berner, J., Åström, K. J., Hast, M., Garpinger, O., Larsson, P., Hägglund, T., Romero Segovia, V. & Soltesz, K.
1900/01/01 → 2022/05/01
Projekt: Forskning

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@conference{de3bd445283e49b1b8119d9fc61ac74c,

title = "Robustness Margins Separating Process Dynamics Uncertainties",

abstract = "In controller design, not only set-point tracking and disturbance rejection can be considered, also robustness towards process uncertainties is a key issue. In this paper, new robustness measures that divide uncertainties into dead time and non-dead time uncertainties, are presented. It is shown, to the contrary of classic measures such as phase/gain/dead time margins, to guarantee stability towards simultaneous process changes, but at the same time being more flexible and less conservative than the robust control framework. The measures depend on extended sensitivity functions and are well illustrated in a Nyquist diagram giving valuable insight. Procedures to calculate the robustness margins are presented and examples are given.",

keywords = "Robustness, Time Delay, Uncertain systems, Stability",

author = "Per-Ola Larsson and Tore H{\"a}gglund",

year = "2009",

language = "English",

note = "European Control Conference, 2009 : ECC´09 ; Conference date: 23-08-2009 Through 26-08-2009",

}

TY - CONF

T1 - Robustness Margins Separating Process Dynamics Uncertainties

AU - Larsson, Per-Ola

AU - Hägglund, Tore

PY - 2009

Y1 - 2009

N2 - In controller design, not only set-point tracking and disturbance rejection can be considered, also robustness towards process uncertainties is a key issue. In this paper, new robustness measures that divide uncertainties into dead time and non-dead time uncertainties, are presented. It is shown, to the contrary of classic measures such as phase/gain/dead time margins, to guarantee stability towards simultaneous process changes, but at the same time being more flexible and less conservative than the robust control framework. The measures depend on extended sensitivity functions and are well illustrated in a Nyquist diagram giving valuable insight. Procedures to calculate the robustness margins are presented and examples are given.

AB - In controller design, not only set-point tracking and disturbance rejection can be considered, also robustness towards process uncertainties is a key issue. In this paper, new robustness measures that divide uncertainties into dead time and non-dead time uncertainties, are presented. It is shown, to the contrary of classic measures such as phase/gain/dead time margins, to guarantee stability towards simultaneous process changes, but at the same time being more flexible and less conservative than the robust control framework. The measures depend on extended sensitivity functions and are well illustrated in a Nyquist diagram giving valuable insight. Procedures to calculate the robustness margins are presented and examples are given.

KW - Robustness

KW - Time Delay

KW - Uncertain systems

KW - Stability

M3 - Paper, not in proceeding

T2 - European Control Conference, 2009

Y2 - 23 August 2009 through 26 August 2009

ER -

Robustness Margins Separating Process Dynamics Uncertainties

Sammanfattning

Konferens

Ämnesklassifikation (UKÄ)

Fingeravtryck

Projekt

PID Control

Citera det här