1 Department of Mathematics, Technical University of Denmark2 Department of Applied Mathematics and Computer Science, Technical University of Denmark3 Department of Electrical Engineering, Technical University of Denmark
The problem of decentralized control is addressed, i.e. theproblem of designing a controller where each control input is allowedto use only some of the measurements. It is shown that such problemsthere does not always exist a sequence of controllers of bounded orderwhich obtains near optimal control. Neither does there exist an infinitedimensional optimal controller. Using the insight of the line of proofof these results, a heuristic design algorithm is proposed for designingnear optimal controllers of increasing orders.