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 MFA Overview
 SISO MFA Controller
 Nonlinear MFA Controller
 MFA pH Controller
 Feedforward MFA  Controller
 Anti-delay MFA Controller
 Robust MFA Controller
 Time-varying MFA  Controller
 Anti-delay MFA pH  Controller
 Multivariable MFA  Control  System
 MFA Control  Methodology

MFA Overview

Model-Free Adaptive (MFA) control, as its name suggests, is an adaptive control method that does not require process models. This patented technology has been developed by CyboSoft, General Cybernation Group Inc. ( A Model-Free Adaptive control system is defined to have the following properties: (1) Precise quantitative knowledge of the process is not necessary; (2) Process identification mechanism or identifier is not included in the system; (3) Controller design for a specific process is not needed; (4) Manual tuning of controller parameters is not required; and (5) Closed-loop system stability analysis and criteria are available to guarantee the system stability.

Variations of the core MFA control technology address specific control problems as described here.

SISO MFA to replace PID so that manual controller tuning is eliminated,
Nonlinear MFA to control nonlinear processes,
MFA pH controller to control pH processes,
Feedforward MFA controller to deal with measurable disturbances,
Anti-delay MFA to control processes with large time delays,
Robust MFA to protect the process variable from running outside a bound,
Time-varying MFA controller to control time varying processes,
Anti-delay MFA pH controller for pH processes with varying time delays, and
MIMO MFA to control multivariable processes.

General-purpose or application-specific MFA controllers can be readily embedded and are becoming available on more and more platforms offered by various vendors supplying building controllers, single-loop controllers, programmable logic controllers (PLCs), hybrid controllers, process automation controllers (PAC), control software, and distributed control systems (DCS).



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