The invention discloses a non-invasive ventilator single-level CPAP
airway pressure self-
adaptive control method, and relates to the technical field of ventilator control, the method comprises the following steps: S1, defining
model parameters, and constructing a filter-ventilation hose aerodynamic model; s2, constructing a recursive least square estimator, and estimating the estimated values of the air resistance and the
pressure difference; s3, inputting the estimated value to the input end and the fan end of the
breathing machine to obtain a rotating speed
signal of a
turbofan, and adjusting the fan outlet pressure and the fan outlet flow by changing the rotating speed of the
turbofan; and S4, based on the
differential pressure estimation error, controlling and adjusting a pressure given
signal of the recursive least square estimator in real time, and realizing full compensation of the internal
differential pressure of the filter-ventilation hose. According to the invention, aiming at the nature of pressure change of the near-end
airway, the whole control only relates to a filter-ventilation hose, and a
patient model and parameters are not needed, so that the range of audiences is not limited.