MFAC
MFAC refers to model free adaptive control, which is is a data-driven approach to adaptive control. The core idea stems from a concept called pseudo-partial derivative (PPD). Here is its introduction in this paper:
[!definition] Instead of identifying a more or less nonlinear model of a plant, an equivalent dynamical linearization model is built along the dynamic operation points of the closed-loop system using a new dynamic linearization technique with a novel concept called pseudo-partial derivative (PPD). The time-varying PPD could be estimated merely using the I/O measurement data of a controlled plant. The dynamic linearization techniques include the partial form dynamic linearization (PFDL), the compact form dynamic linearization (CFDL), and the full form dynamic linearization (FFDL).
[!note] Note Model free adaptive control is closely related to Data-driven Control
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