Stability and Control for Interconnected Multivariable Systems.

Document Type : Research Studies

Authors

1 Control & Computers Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

2 Process Control & Inst. Dept Ammonia Plant., Semadco., Talkha.

Abstract

The paper presents the analysis and control for an Interconnected  multivariable system  which simulates the behaviour of a subsystem of  real chemical ammonia conversion process in SEHADCO. An ARHA model is  constructed - using a discrete dynamic system - in a difference  equation form able for testing stability. and in a matrix fan for  applying control techniques. Since relative gains provide a useful  measure of interaction indices, so relative gain matrix procedure is  followed for modifying the interconnected static gains through  introducing computing relays with adjustable gains in the open loop  control system for ensuring composite system stability.  
Pole assignment technique is used for designing the sui table  closed-loop strategy for composite system . Numerical results agree  with the effectiveness of both of the suggested interconnected  computing relays and the designed control strategy.

Main Subjects