1. Technische Universität Kaiserslautern,Chair of Machine Tools and Control Systems,Department of Mechanical and Process Engineering,Kaiserslautern,Germany,D-67663
2. Technologie-Initiative SmartFactory KL e.V.,Kaiserslautern,Germany,D-67663
3. German Research Center for Artificial Intelligence (DFKI),Kaiserslautern,Germany,D-67663