Minimum variance feedforward control of a once-through steam generator

IMC based feedforward controller framework for disturbance attenuation on uncertain systems

“…(7) and (8) are no longer valid and the complete and interacting expressions (1) and (2) have to be used.…”

“…Therefore the scenario where the use of feedforward control action can easily provide advantages is, mainly, those where the effect of the control variable on the process output is slower than the disturbance variable, either due to long process time constants or a transport delay. Early examples provided by [3] show their application to distillation columns albeit other situations can be found in the literature [4][5][6][7][8].…”

A Review of Steam Generation for In-Situ Oil Sands Projects

“…For both types, steam temperatures are affected mainly by fuel flow (firing rate) and BFW feed rate. Hence final steam temperature can be represented as the superposition of effects from fuel flow and feedwater flow rate 40 . Combustion air flow and steam pressure are additional factors affecting minorly 41 .…”

Disturbance compensation on uncertain systems: Feedforward control design for stable systems

“…Therefore the scenario where the use of feedforward control action can easily provide advantages are, mainly, those where the effect of the control variable on the process output is slower than the disturbance variable, either due to long process time constants or a transport delay. Early examples provided by Luyben [1969] show their application to distillation columns albeit other situations can be found in the literature Morari and Zafirou [1989], Weng and Ray [1997] Zhang and Agustriyanto [2001] Gooden et al [1999] Mc-Nab and Tsao [1997].…”