Identification method for nonlinear system with disturbance
A nonlinear system and identification method technology, applied in the field of industrial control, can solve problems such as reducing identification accuracy, reducing computational complexity, and not considering the influence of disturbance identification algorithms.
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[0087] refer to Figure 1-3 , a specific embodiment of the present invention comprises the following steps:
[0088] A. Transform the industrial control system to be identified into a nonlinear system model with disturbance, the nonlinear system consists of a nonlinear link and a linear link, that is, the Hammerstein system of the output error type; set the initial value P(0), P ξ (0), u(k)=0,p,γ 1 and gamma 2 , collect system input and output data u(k) and y(k);
[0089] B. Decompose the above-mentioned nonlinear system model with disturbance into two sub-models: the system noise-free output sub-model and the disturbance sub-model, and construct the system output vector Y(p, k), information vector information matrix disturbance vector
[0090] C. Update system parameters Construct and update parameters Let k=k+1, return to step A until the cut-off condition is met
[0091] Where δ is a non-negative number, or reaches a certain number of samples;
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