Help linearizing simulink model. "The value of the "A" property must be a numeric array without any Inf's or NaN's"

I have constructed a linear simulink model from a nonlinear model. The linear representation is included as an ss block. A controller and actuator dynamics have been introduced to examine the effects of slew rate limits. A pic of the model is attached.

When linearizing the model to obtain the closed-loop (broken-loop/dist/etc) response using the linear analysis design tool I am recieving the error

"The value of the "A" property must be a numeric array without any Inf's or NaN's"

While the condition number of the state matrix is relatively large (1.0377e+004) the state matrix is not singular. Naturally the elements of the state equation contain numeric values.

Searching the forums this does not appear to be a common error.

Any assitance in interpreting this error message would be most welcome.

Best,

Jamie

Answer 1

[Jamie]

The error refers to the state matrix that is returned from the lin operation and simply indicates that the state matrix computed is singular to working precision.