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operspec(idnlarx)

Construct operating point specification object for idnlarx model

Syntax

SPEC = operspec(NLSYS)

Description

SPEC = operspec(NLSYS) creates an operating point specification object for the idnlarx model NLSYS. The object encapsulates constraints on input and output signal values. These specifications are used to determine an operating point of the idnlarx model using findop(idnlarx).

Input Arguments

  • NLSYS: idnlarx model.

Output Arguments

  • SPEC: Operating point specification object. SPEC contains the following properties:

    • Input: Structure with fields:

      • Value: Initial guess for the values of the input signals. Specify a vector of length equal to number of model inputs. Default value: Vector of zeros.

      • Min: Minimum value constraint on values of input signals for the model. Default: -Inf for all channels.

      • Max: Maximum value constraint on values of input signals for the model. Default: Inf for all channels.

      • Known: Specifies when Value is known (fixed) or is an initial guess. Use a logical vector to denote which signals are known (logical 1, or true) and which have to be estimated using findop (logical 0, or false). Default value: true.

    • Output: Structure with fields:

      • Value: Initial guess for the values of the output signals. Default value: Vector of zeros.

      • Min: Minimum value constraint on values of output signals for the model. Default value: -Inf.

      • Max: Maximum value constraint on values of output signals for the model. Default value: -Inf.

See Also

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