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Anesthesia can be administered automatically by a control system. To ensure adequate operating conditions for the surgeon, muscle relaxant drugs, which block involuntary muscle movements, are administered.
A conventional method used by anesthesiologists for muscle relaxant administration is to inject a bolus dose whose size is determined by experience and to inject supplements as required. Significant improvements may be achieved by introducing the concept of automatic control, which results in a considerable reduction in the total relaxant drug consumed [19].
A model of the anesthesia process is shown in Figure DP8.4. Select a gain K so that the bandwidth of the closed-loop system is maximized while Mpv … 1.5.
Determine the bandwidth attained for your design.

Controller Person R(s) Desired Y(s) K Drug FIGURE DP8.4 Model of an relaxation 0.35 +1 input 0.6s+1 Actual relaxation level level anesthesia control system.