ADAPTIVE-CONTROL OF ULTRAFILTRATION

An adaptive controller has been developed and implemented for the cont rol of ultrafiltration in dialysis treatments of patients with renal p roblems. The reason for using adaptive control is the large difference in process dynamics when different dialysis filters are used. For sev eral reasons, an adaptive pole-placement controller with least-squares identification was chosen, Due to the nature of the process, special attention was paid to the problem of having a smooth startup, This and other design considerations are discussed in a special section follow ing the description of the process and the control design, A few regis trations of signals from the real process are also shown.