The invention relates to the technical field of
motor control, in particular to a speed
stabilization control method and
system for a
hybrid power range
extender, and the method comprises the steps: obtaining the operation disturbance of an HEV, training an
echo state network to learn a
time sequence dynamic state, enabling the disturbance to be engine
crankshaft torque fluctuation, sampling into a historical sequence according to a
control period, and enabling the network to comprise an input layer, a reservoir layer and an output layer; the reservoir is provided with a nonlinear recursive unit of leakage integral, and multi-step prediction is output; the relative
angular displacement and relative
angular velocity of an engine
crankshaft and a
planet carrier, the
angular velocity of a second motor and the current engine torque are obtained at the control moment; driving the network multi-step look-ahead by using the current disturbance and the historical sequence, covering a control and prediction
time domain, and forming a time margin not less than calculation and execution lagging; discrete
state space prediction control is constructed based on the disturbance sequence, input and output constraints are applied, and a current state is used as an initial value for extrapolation; an optimal
motor torque sequence meeting constraints is obtained through real-time iterative quadratic
programming in the
current period, and feed-forward compensation and smooth compromise are achieved; and caching the next period segment and issuing the next period segment to an execution mechanism on time. According to the invention, the problem that the HEV power
system is easy to cause insufficient compensation or overcompensation during compensation can be solved.