Interacting processes are available in Industries. Control of such interacting processes is a challenging problem. Various control schemes like multiloop control, decentralised control with decoupler and centralised control are available for interacting processes. Multiloop decentralised control is the simplest among all the control because of its simplicity and easy adaptation. Decentralised control involves splitting of MIMO systems into n number of SISO systems and design of controller for the SISO system. But the interaction effects cannot be eliminated and involves decoupler to nullify the interaction effects in traditional approach. Online tuning of the optimal parameters is done by putting the process under servo regulatory condition and by varying the set point of tanks simultaneously leading to a controller which avoids decoupler. In this article, the servo and regulatory conditions for the system is analysed by using fractional order PI controller. Performance shows that for MIMO process the proposed FOPI controller is best suited for control applications.

交互过程可在“工业”中使用。对这种相互作用过程的控制是一个具有挑战性的问题。各种控制方案（如多回路控制，带解耦器的分散控制和集中控制）可用于交互过程。多回路分散控制是所有控制中最简单的，因为它简单易用。分散控制涉及将MIMO系统分为n个SISO系统和SISO系统控制器的设计。但是，交互作用是无法消除的，在传统方法中需要使用解耦器来消除交互作用。通过将过程置于伺服调节条件下并同时更改储罐的设定点，可以实现最佳参数的在线调整，从而避免了使用解耦器。在本文中，使用分数阶PI控制器分析了系统的伺服和调节条件。性能表明，对于MIMO过程，所提出的FOPI控制器最适合控制应用。