Increasing Reliability of Intelligent Manufacturing Systems by Adaptive Optimization and Safety Supervision

Abstract For concurrent consideration of reliability and safety of manufacturing systems on the one hand, and flexibility and performance on the other, a specialized control architecture was proposed recently. It consists of a strategic controller for online computing (sub-)optimal control strategies under consideration of dynamic models, safety specifications, and learned knowledge. The second building block is an operational controller for providing certified safety when dealing with behaviors that are not completely predictable, for instance in case of faults. This paper extends the architecture by a specific technique for the strategic controller: For the case of an intelligent manufacturing system which reacts adaptively to a human operator, control trajectories for a robot arm are computed online such that collision with the operator is excluded. The computation is based on solving a mixed-integer programming problem that takes a dynamic safety area around the operator into account as constraint.

[1]  Z. Mnich,et al.  Indoor Radon Concentrations in Concrete Slab Buildings Situated in Green Hills Housing Estate in Białystok, Poland , 2008 .

[2]  Olaf Stursberg,et al.  Controller Architecture for Safe Cognitive Technical Systems , 2007, SAFECOMP.

[3]  Olaf Stursberg,et al.  INTELLIGENT PLANNING OF MANUFACTURING SYSTEMS WITH HYBRID DYNAMICS , 2007 .

[4]  Michael F. Zäh,et al.  Towards the Cognitive Factory , 2007 .

[5]  Frank Schiller,et al.  Application of Intelligent Safety Controllers in Cognitive Technical Systems , 2007 .

[6]  O. Stursberg,et al.  A graph search algorithm for optimal control of hybrid systems , 2004, 2004 43rd IEEE Conference on Decision and Control (CDC) (IEEE Cat. No.04CH37601).

[7]  Jonathan P. How,et al.  Model predictive control of vehicle maneuvers with guaranteed completion time and robust feasibility , 2003, Proceedings of the 2003 American Control Conference, 2003..

[8]  O. Stursberg,et al.  OPTIMAL CONTROL OF SWITCHED CONTINUOUS SYSTEMS USING MIXED-INTEGER PROGRAMMING , 2002 .

[9]  B. Moor,et al.  Mixed integer programming for multi-vehicle path planning , 2001, 2001 European Control Conference (ECC).

[10]  David Q. Mayne,et al.  Constrained model predictive control: Stability and optimality , 2000, Autom..

[11]  Gerhard Strube,et al.  Modelling Motivation and Action Control in Cognitive Systems , 1998 .

[12]  Norman I. Badler,et al.  Real-Time Inverse Kinematics of the Human Arm , 1996, Presence: Teleoperators & Virtual Environments.

[13]  John D. C. Little,et al.  On model building , 1993 .

[14]  T. Flash,et al.  The coordination of arm movements: an experimentally confirmed mathematical model , 1985, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[15]  Richard C. Larson,et al.  Model Building in Mathematical Programming , 1979 .