Summary

This article explains practical methods for estimating encoder velocity using tracking loops and phase-locked loops (PLLs), building on initial velocity-estimation basics. Readers will learn how to design, discretize, and implement robust tracking/PLL schemes and avoid common pitfalls that break real-world firmware and motor-control systems.

Key Takeaways

• Implement a basic digital PLL suited for quadrature encoder signals and integrate it into firmware.
• Design a velocity-tracking loop that balances responsiveness and noise rejection through appropriate loop filters.
• Tune loop gains and filter time constants to minimize jitter from quantization and encoder noise without introducing excess lag.
• Analyze and mitigate pitfalls such as aliasing, missed counts, and phase slips that degrade velocity estimates in embedded systems.

Who Should Read This

Embedded and motor-control engineers (firmware developers or control engineers) with experience in microcontrollers and encoder systems who need reliable encoder velocity estimates for real-time control.

Still RelevantAdvanced

Topics