add check on fundamental limitations

[baggepinnen]

[JuliaControlBot]

This is an automated message. Plots were compared to references. 8/11 images have changed, see differences below. After pulling this PR, please update the reference images by creating a PR to ControlExamplePlots.jl here.

Difference	Reference Image	New Image
:x: 0.048
:heavy_check_mark: 0.0
:heavy_check_mark: 0.001
:heavy_check_mark: 0.001
:heavy_check_mark: 0.0
:x: 0.043
:x: 0.059
:heavy_check_mark: 0.01

[codecov[bot]]

Codecov Report

Merging #699 (b546d96) into master (3a92ba8) will decrease coverage by 0.80%. The diff coverage is 0.00%.

:exclamation: Current head b546d96 differs from pull request most recent head 8fb54e6. Consider uploading reports for the commit 8fb54e6 to get more accurate results

@@            Coverage Diff             @@
##           master     #699      +/-   ##
==========================================
- Coverage   87.58%   86.79%   -0.80%     
==========================================
  Files          35       35              
  Lines        3601     3634      +33     
==========================================
  Hits         3154     3154              
- Misses        447      480      +33     

Impacted Files	Coverage Δ
src/analysis.jl	80.42% <0.00%> (-8.88%)	:arrow_down: