Predicts future error to dampen the system’s response.
If you are looking for free, high-quality PDFs on control theory fundamentals, the following resources are widely used in academia: Control Theory Fundamentals Richard Poley Pdf
Control systems are often drawn as interconnected blocks. Poley provides a cheat sheet of reduction rules: series, parallel, and feedback (G/(1+GH)). The PDF includes dozens of worked examples where a messy diagram is simplified into a single transfer function—a critical skill for any control engineer. Predicts future error to dampen the system’s response