The paper deals with the problem of regulating both the air total mass flow rate and its distribution in a 70 MW constricted-segmented electric arc heater by means of a five way air supply system. Firstly a description of the detailed dynamic model of the pneumatic process, obtained in the lumped parameter domain, is provided; then the control strategy is described. In order to guarantee the desired distribution of the total air supplied along the arc heater, a multiple PI control technique is proposed to command five partitioning valves. A physical reduction of the plant model leads to five decoupled linear parameter varying first order systems. For each of them a PI controller is designed. A robust synthesis which makes use of the concept of quadratic stability with a fixed decay rate and with an H∞ norm bound is proposed to cope with uncertainties, nonlinearities and disturbances. Numerical simulations are carried out to show the effectiveness of the control technique.
Robust regulation of the air distribution into an arc heater / Mattei, M.. - In: JOURNAL OF PROCESS CONTROL. - ISSN 0959-1524. - 11:3(2001), pp. 285-297. [10.1016/S0959-1524(00)00002-0]
Robust regulation of the air distribution into an arc heater
Mattei M.
2001
Abstract
The paper deals with the problem of regulating both the air total mass flow rate and its distribution in a 70 MW constricted-segmented electric arc heater by means of a five way air supply system. Firstly a description of the detailed dynamic model of the pneumatic process, obtained in the lumped parameter domain, is provided; then the control strategy is described. In order to guarantee the desired distribution of the total air supplied along the arc heater, a multiple PI control technique is proposed to command five partitioning valves. A physical reduction of the plant model leads to five decoupled linear parameter varying first order systems. For each of them a PI controller is designed. A robust synthesis which makes use of the concept of quadratic stability with a fixed decay rate and with an H∞ norm bound is proposed to cope with uncertainties, nonlinearities and disturbances. Numerical simulations are carried out to show the effectiveness of the control technique.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.