The Tracking Ratio Station

Research output: Contribution to journalArticle

Standard

The Tracking Ratio Station. / Hägglund, Tore.

In: Control Engineering Practice, Vol. 69, 12.2017, p. 122-130.

Research output: Contribution to journalArticle

Harvard

APA

CBE

MLA

Vancouver

Author

RIS

TY - JOUR

T1 - The Tracking Ratio Station

AU - Hägglund, Tore

PY - 2017/12

Y1 - 2017/12

N2 - In ratio control, the control objective is to keep the ratio between two signals, normally flow measurements, at a desired value in spite of variations in setpoints and load disturbances, and possible control signal saturations. This paper presents a new ratio control scheme, the Tracking Ratio Station, that manages to handle all these situations. It is also able to keep the ratio when one of the controllers takes a local setpoint or is switched to manual control. The Tracking Ratio Station determines the setpoints of the two flow loops so that the one with the largest control error follows the external setpoint, whereas the one with the smallest control error follows the process output of the opposite control loop. The paper illustrates the properties of the Tracking Ratio Station in terms of both simulations and industrial field tests.

AB - In ratio control, the control objective is to keep the ratio between two signals, normally flow measurements, at a desired value in spite of variations in setpoints and load disturbances, and possible control signal saturations. This paper presents a new ratio control scheme, the Tracking Ratio Station, that manages to handle all these situations. It is also able to keep the ratio when one of the controllers takes a local setpoint or is switched to manual control. The Tracking Ratio Station determines the setpoints of the two flow loops so that the one with the largest control error follows the external setpoint, whereas the one with the smallest control error follows the process output of the opposite control loop. The paper illustrates the properties of the Tracking Ratio Station in terms of both simulations and industrial field tests.

KW - Ratio control, Ratio Station, Blending, In-line blending, Mixing, Process control, Tracking Ratio Station

U2 - 10.1016/j.conengprac.2017.09.016

DO - 10.1016/j.conengprac.2017.09.016

M3 - Article

VL - 69

SP - 122

EP - 130

JO - Control Engineering Practice

JF - Control Engineering Practice

SN - 0967-0661

ER -