Episode 43 · Process Control
Process Control, Part 1: Dynamics from First Principles
Part one of Process Control begins with a tank that will not settle and asks what determines a process response. Gain, first-order lag, dead time and integrating behavior provide distinct ways to describe the dynamics behind a trend. Noise and sampling complicate what the controller can observe. The episode then examines how closing the loop changes the system, preparing the foundation needed to understand and tune feedback in part two.
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Explore the working principle
Inside this episode
- Cold open: the tank that would not sit still
- What a process actually is
- Steady state and gain: how far, not how fast
- The first order lag: the bathtub with a plug hole
- Dead time: the shower that lies to you
- The integrator: the tank with no plug hole
- Higher order, inverse response, and other personalities
- Linear thinking and why it mostly works
- Modelling a tank from first principles
- The step test: asking the process a question
- Why the lung breathes: integrators meeting integral action
- What is the tank for? Tight versus averaging control
- Noise, sampling, and seeing clearly
- The closed loop changes everything
- Ines tunes the lung, almost
- Recap and what comes next
Production credits & AI disclosure
Scripts generated with Claude Opus. Synthetic narration generated with Edge TTS. Reviewed, listened to, and approved by Sankalp Thakur.