What are the benefits, if any, that a computing cloud (see Fig. 9.3 ) could offer for a distributed control system of large - scale plants compared with traditional solutions to similar requirements?

Class discussion: Is it feasible to combine Internet - based cloud computing with such a distributed control system having hard and firm real - time constraints?

Figure 9.3

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User 1 Internet Computing Cloud User 3 User 2 User 4 Soft RT Hard RT Supervisory Central Computing Unit Control and Node Support Advanced Fieldbuses Node a Node A Node b Node B Local Control of Local Control of Subsystem I Subsystem II Node c Node C Node d Node D