Feedback: Still the Simplest and Best Solution

Abstract

Most engineers are (indirectly) trained to be "feedforward thinkers" and they immediately think of "model inversion" when it comes to doing control. Thus, they prefer to rely on models instead of data, although feedback solutions in most cases are much simpler and more robust * .

Integration of process design and control: A review

“…Furthermore, there is no general agreement between researchers on the criteria for selection of the controller type. Some researchers (Luyben 2004;Skogestad 2009) emphasize simplicity and robustness of the conventional multi-loop control systems and criticize the reliability and costs of modern types. On the other side of this discussion, other researchers (Stephanopoulos, and Ng 2000;Rawlings and Stewart 2008) argue the economic advantages of model-based control systems and their systematic approach for handling constraints.…”

An Innovative Systematic Approach to Financial Portfolio Management via PID Control

“…In industrial environments such as chemical plants, power plants, and engineering industries, numerous processes need to be accurately controlled to conform to the required specifications of the resulting products. PID control is straightforward, easily implementable method, still currently preferred by engineers and scientists to more complex systems (Skogestad, 2010). In finance, financial market assets comprising a portfolio or a market benchmark represent the process plant, controlled by the PID controller.…”

Model-free optimal anti-slug control of a well-pipeline-riser in the K-Spice/LedaFlow simulator

“…• Feedback PID control strategy of a pipeline-riser, controlling the riser base pressure with the topside choke as control input, in Ogazi AI (2010), Jahanshahi and Skogestad (2015), Storkaas and Skogestad (2007), Storkaas et al (2001) and Skogestad (2009).…”