Abstract

Because of the desirable characteristics such as simplicity, modularity, extendibility, adaptability, robustness and fault tolerance, shop-floor control systems that built on the auction- based, fully-distributed control paradigm have been attracting increasing attention. In this paper, we present rules for the design of protocols underlying auction-based shop-floor control systems to avoid message deadlock. Reference models of two auction-based control protocols, namely the job-initiated protocol and the machine-initiated protocol are defined, We address issues pertaining to the message deadlock situations at each stage of the auction protocols. We investigate the effects of some system parameters on the deadline specification within the auction protocols, using a distributed simulation model built on a parallel computing testbed.

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