The 35 year old has also played for Strasbourg,West Ham,Wimbledon and Birmingham before teaming up with Iain Dowie at Crystal Palace.
Said Iain Dowie to the club website: "Having worked with Michael before, I know what a great technician he is and how much enthusiasm he has for the game.
"He is a winner and always strives to be part of a competitive unit. He is a natural leader and that, coupled with his experience, means he is an excellent addition to our squad."