Allan Kern, P.E., is owner and president of APC Performance LLC. Courtesy: APC Performance LLC

Allan Kern


Courtesy: APC Performance LLC
PID, APC March 1, 2022

Understanding the critical role of metrics for advanced process controls

Advanced process controls (APC) requires appropriate metrics, or key performance indicators (KPIs) to ensure safe, efficient operations. Alarms, relief valves, safety systems and APC need monitoring. Learn five good APC metrics, the missing metric and four recommended practices for APC metrics.

By Allan Kern
Courtesy: APC Performance LLC
PID, APC November 29, 2021

Understanding APC limits and targets

Process automation and optimization need to use automated multivariable control so it evolves into an industry core-competency, providing low cost, low maintenance and high agility with long life-cycle technology instead of manual multivariable control. Understand limits and targets of advanced process control.

By Allan Kern
Courtesy: APC Performance LLC
PID, APC September 1, 2021

Understanding the matrix for APC improvements

More agile tools are helping multivariable control become more effective for advanced process control and other applications than traditional model-based control (MPC) and real-time optimization. Process engineers, operations personnel, DCS and APC engineers, and other process operation and optimization stakeholders benefit from understanding the matrix.

By Allan Kern
Courtesy: APC Performance
PID, APC July 30, 2021

Multivariable control as a core competency

A healthy multivariable advanced process control (APC) layer should be a core-competency of the process industries.

By Allan Kern
Process Instrumentation and Sensors October 31, 2020

Changes in store for advanced process control

In advanced process control (APC), closed-loop multivariable control brings the inherent benefits of greater timeliness and consistency, fewer alarms and constraint violations and more effective process optimization. Multivariable control is core to most process operations. See “What is ‘real-time’ optimization?”

By Allan Kern
Automation, Controls August 28, 2020

Feedforward: Not as popular as expected, again

Feedforward and feedback: Multivariable control, like single-loop control, can be accomplished primarily with feedback control and selective (not wholesale) use of feedforward.

By Allan Kern
Process Instrumentation and Sensors April 4, 2020

Understanding the role of multivariable control in industrial process operations

Advanced process control: An improved understanding of the role of multivariable control in industrial process operations will lead to more cost-effective solutions and engage a wider circle of people in the process automation enterprise.

By Allan Kern
PID, APC January 15, 2020

Advanced process control: More answers

After a webcast on “Advanced process control: Past, present and future,” more answers to audience questions are provided by the webcast speaker covering advanced process control (APC) to help with process optimization.

By Allan Kern
PID, APC December 2, 2019

Operation-driven matrix design

A multivariable control matrix has manipulated variables (MVs) on one axis, controlled variables (CVs) on the other axis, and models in the matrix that indicate a relationship between that MV/CV pair. Effective multivariable controllers use the right models for various control and optimization needs.

By Allan Kern
PID, APC September 9, 2019

Advantages of RPC and limits of model-based control

Part 3: Rate-predictive control, an alternative algorithm to proportional-integral-derivative (PID) and model-based control, can provide single-loop control. See three RPC advantages and two model-based control limitations.

By Allan Kern
Process Safety July 12, 2019

10 alarm management tips for the busy control engineer

Alarm management has been a great success for the process industry. Initial challenges have largely been met, but new challenges have emerged. Alarm management is most effective as an operations tool, not a safety tool.

By Allan Kern
Process Instrumentation and Sensors April 30, 2019

Model-less multivariable control benefits

Part 2: Model-less multivariable control (XMC) is designed to solve multivariable control challenges without using detailed models or embedded optimizers.

By Allan Kern
Process Instrumentation and Sensors March 26, 2019

What is rate-predictive control?

Advanced control: A new non-PID control algorithm, rate-predictive control (RPC), is adaptive to changes in process gain, which is helpful given the industry’s difficult history of loop tuning, auto-tuning, and model maintenance. RPC also can serve as a model-less feedback multivariable control algorithm.

By Allan Kern