A new approach to decentralised, process control using passivity and sector stability conditions

A new robust decentralised process control strategy based on the sector stability theorem is proposed in this paper. The interaction between sub-systems is measured by a revised passivity index, which is used in the development of a new stability condition for decentralised control. The controller synthesis method is developed to satisfy the stability condition and H-infinity performance specification. The decentralised control of a boiler furnace is studied as an application example.