Design method for nonlinear system controller of aero-engine
A technology of aero-engine and nonlinear system, applied in the field of controller design of aero-engine nonlinear system
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[0103] The design method of the nonlinear system controller of the aero-engine of the present invention comprises the following steps:
[0104] Step 1), establish the nonlinear state variable model of the aeroengine, which can be expressed by the following formula:
[0105]
[0106] Among them, the system equation is linear to the input u, x is an n-dimensional state vector, f(x) is a smooth n-dimensional vector function, f=[f 1 ,..., f n ] T , B(x) is n×m order function matrix, B=[b 1 ,...,b m ], u is the m-dimensional control vector, d(t)=Dg(t) is the n-dimensional interference vector d(t) is the external interference, and satisfies the interference matching condition:
[0107] rank(B,d)=rank(B)(2)
[0108] Step 2), accurately linearize the nonlinear model in step 1) based on the exact linearization theory;
[0109] Step 3), designing a sliding mode variable structure controller for the linearized model in step 2), forcing the new state variable to move according to...
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