DESIGN AND EVENT-DRIVEN CONTROL OF FUNCTION BLOCKS FOR ADAPTIVE PROCESS PLAN EXECUTION

摘要

In addition to complex job shop operations, shop floor uncertainty is another issue regularly challenging manufacturing engineers, including job delay, urgent job insertion, fixture shortage, missing tool, and even machine break-down. Targeting the fluctuation, this research proposes a DPP (distributed process planning) approach to generating adaptive process plans. Enabled by function blocks, a so-generated process plan is responsive and tolerant to an unpredictable change. This paper introduces in detail how a function block is designed and what it can do during process plan execution. It is expected that the new approach can largely enhance the dynamism of fluctuating job shop operations.