Control

Advanced process control assessment

We review signals, actuators, delays and constraints before defining an advanced process control application.

When it applies

An expert system, APC or MPC is being considered and the conditions for implementation need to be established.

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Starting information

  • Control architecture and manipulated variables
  • Historical setpoints, disturbances and response
  • Current constraints, protections and procedures

Proposed work

We define the decision to automate and review whether the signals make its effect observable. We identify tests and acceptance conditions before proposing control logic.

Deliverable

A feasibility assessment and validation scope identifying gaps in instrumentation, data and integration.

Plant trials, equipment installation and control changes require a specific scope and authorisation. This description does not replace operating procedures.

Knowledge

Related reading

Modelling and control 3 min

Why having data does not mean having control

Data describe measurements. Control requires interpreting the process state, distinguishing disturbances, choosing an action and observing its effect. A dataset may contain many rows and still fail to reconstruct…

Published

Instrumentation and data 2 min

One signal does not explain an operating decision

A signal shows one part of the process response. Explaining a decision requires reconstructing what changed, how the system responded, which action was taken and which effect appeared afterwards.

Published

Modelling and control 2 min

How to validate a model before using it for a control decision

It remains to be evaluated whether the model retains usefulness on data that did not participate in fitting and whether it represents the intended decision. A good retrospective fit may depend on future information,…

Published