CCS and Power Systems

Crosscutting Research - Plant Optimization Technologies


Intelligent Actuation Control Using Model Free Adaptive Control Technology


Performer: Cybosoft General Cybernation Group Inc

Project No: FG02-08ER84944


Accomplishments


Phase I objectives were successfully completed, with encouraging results. A novel MFA actuation controller was developed that can effectively control valve position processes that have nonlinear backlash problems and large changes in valve gain, time constant, and delay time. The MFA valve position controller was able to control the linear and nonlinear valve position process models with consistent control performance in all 48 step test conditions. In contrast, the high-gain proportional–integral–derivative (PID) control, which is typically used for valve position control, failed in more than 50 percent of the test conditions. During Phase I, a novel, anti-delay, nonlinear MFA controller for valve position control was developed. This controller effectively managed large changes in valve gain, time constant, and delay time, and included a unique anti-backlash scheme to effectively deal with the backlash problem of the valve position process. Numerous closed-loop control simulations for valve position control were performed using the MFA controller and a PID controller. The linear and nonlinear valve position process models developed in this project were controlled using 24 varying test conditions for each model. Research was conducted on valve positioner products currently available with a viable MFA valve positioner product developed. A development plan was created to demonstrate that the MFA valve positioner can be tested side-byside with leading valve positioners for air and liquid flow control.

In Phase II, the process of developing multiple MFA actuation control products to effectively control actuation processes that have nonlinear backlash problems and large variations in valve gain, time constant, and delay time is under development.


Project Details