To add to 411A's yep.............
Boeing have a system fairly much as you describe it on the B777. It doesn't provide the Stab Trim required, but rather provides a mis-trim warning, which sends you back to re-check the numbers.
Not working too well, there's presently a Boeing bulletin regarding erroneous warnings, which trigger fairly regularly.
Practice makes perfect, they'll get it right in the end.
Regards,
Old Smokey