This invention discloses an improved extended
state observer model-free control method for random load disturbance conditions, relating to the field of speed control technology under nonlinear loads and disturbance conditions. The method includes: establishing the mechanical motion equations of a
coal unloading crawler device; the
coal unloading crawler device consists of a
chain system, a scraper bucket, a tensioning mechanism, a
drive motor, and a main frame; establishing a hyperlocal model of the
coal unloading crawler device based on model-free
control theory and
rewriting the extended state equations; addressing the limitations of the
finite difference method by introducing an extended
state observer to estimate all unknown dynamics in real time; and introducing a compensation function to construct an improved extended
state observer, correcting
estimation errors, thereby designing a model-free controller. This invention proposes an improved extended state observer structure, which suppresses high-
frequency noise interference in disturbance
estimation by introducing a filtering compensation mechanism, improving the observer's
frequency domain performance and the
system's dynamic response speed.