Artificial Intelligence (AI) is one of the most useful technologies during COVID19 pandemic. In this current situation, AI played a vital role in various and different sector from an infected patient to the economy-wide. A wide range of examples are available for how AI tackled with COVID19 and is helping during the pandemic around the world. During this pandemic time, large to small companies have been developing new AI approaches such as droids, machine, software and gadgets in embracing fight against COVID19 pandemic. The present study reviews application of AI and how it has supported in this pandemic.
Safety and economic considerations pose constraints on
inputs and
outputs of industrial processes. A conventional feedback control system
is not equipped to handle these constraints, and hence, industrial
practitioners resort to the addition of ad hoc elements such as selector
blocks, in conjunction with more sophisticated control strategies
such as split range control. However, this approach lacks an organized
and prudent methodology and is usually carried out with the aid of
experiential knowhow of plant operators and control engineers. Some
recent developments in the literature address this issue, however
simultaneously alluding to model predictive control (MPC) as a more
natural approach for such systems. In this work, we evaluate the efficacy
of the aforementioned approach of simple ad hoc additions to accommodate
constraints in a process. To this end, with the aid of a continuously
stirred tank reactor model, we illustrate the ease of deployment of
selector blocks for handling constraints in simple systems and assess
their limitations as the system becomes more complex. Next, we consider
a heat exchanger employed in a South-East Asian processing facility
where the performance of the currently used selector-based architecture
is deemed unsatisfactory by the operators. The current control structure
was evaluated for conformity with the approaches suggested in the
recent literature and was found to be sound; hence, the unsatisfactory
performance stems from the inherent limitations of the proportional
integral control structure and/or improper tuning. The implementation
of MPC on the exchanger system leads to performance amelioration and
enhanced robustness.
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