tfest with forcing stable poles

Is it possible to force tfest to only use stable poles to estimate the transfer function?

Test case:

Trying to estimate TF from following freq response data.

Using tefest, with any combinations of nz and np, the estimated transfer function always contain unstable (+ve) poles.

%% FRD Data
% Mag vs Freq
mag_db_freq_hz = [0.001 0.1 2.5 7.3  ];
mag_db         = [-3   -3  -3  -11.5 ];
% Phase vs Freq
phase_deg_freq_hz = [0.001 0.1 0.26 0.58  1   1.75  2.8  3.5  ];
phase_deg         = [-20  -20 -23  -30   -37  -54   -75  -90  ];

[Alborz Sakhaei]

@Arkadiy Turevskiy

@Rajiv Singh

Answer 1

[Arkadiy Turevskiy]

You can use EnforceStabilty option for tfestOptions:

https://www.mathworks.com/help/ident/ref/tfestoptions.html