Supervisory Adaptive Control Of Arterial Pressure: Performance During Cardiac Surgery

A supervisory adaptive closed-loop sodium nitroprusside controller has been designed for the control of arterial pressure during cardiac surgery. Thii controller consists of a pole-placement and proportional-plus-integral (PP&Pl) feedback regulator, multiplemodel adaption (MMA) awl a supervisor. The PP&PI was designed to meet specific step response characteristics. The MMA was chosen to ensure rapid and stable adaption to changes in key patient parameters. The supervisor was designed to ensure safety and efficacy of control during disturbances which are common during cardiac surgery. This paper presents the performance of this controller during cardiic surgery.