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Deadlock and Collision Handling for Automated Rail-Based Storage and Retrieval Units

: Müller, M.; Schmidt, S.; Reggelin, T.


Mustafee, N. ; Institute of Electrical and Electronics Engineers -IEEE-:
Winter Simulation Conference, WSC 2019 : December 8-11, 2019, National Harbor
Piscataway, NJ: IEEE, 2019
ISBN: 978-1-7281-3283-9
ISBN: 978-1-7281-3282-2
ISBN: 978-1-7281-2052-2
Winter Simulation Conference (WSC) <2019, National Harbor/Md.>
Fraunhofer IFF ()

When planning logistics systems with multiple transport objects or systems, modeling requires the implementation of complex control logic to avoid collisions and deadlocks. This paper illustrates a procedure for the development of such control logic on the example of rail-based storage and retrieval units in combinations with lifts in the picking area of an industrial laundry. Typical collision situations and a possible solution approach for avoiding these are described. In addition, a discrete event simulation demonstrates which situations occur most frequently depending on warehouse dimensioning.