Abstract
The performance of the standard PID controller is unsatisfactory for processes that vary over time. In those scenarios, adaptive controllers can adjust the control behavior by adjusting the process dynamics and unwanted load changes. The desired process performance parameters are given in the model reference adaptive control (MRAC) as a reference model (RM). The adaptation method modifies the control outcome by the difference between reference model and the performance of actual process with a fixed adaptation gain (γ). This research explores the various MRAC technology for under-damped second-order process and with dead time. The first one is focused on the MIT rule, the second is the modified MRAC method. The modified controller assures better response, improved set point tracking with less oscillation and lower oscillations during unfavorable loading changes. This fact is also confirmed by using various performance indexes under closed-loop operation. Using Simulink, the methods are showcased.KeywordsMRACMRAC-PDMIT ruleIAEITAEISESecond-order processDead time
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