Control Design

Fundamentals of Position Feedback

Automation has shifted from simple limit switches to dynamic position‑feedback devices such as encoders and LVDTs, delivering continuous data across varying speeds. Encoders dominate motion‑to‑electrical conversion, with absolute models preserving position after power loss and incremental models tracking relative movement. Gray code encoding, where only one bit flips per step, mitigates spurious readings during high‑speed transitions. Linear variable displacement transformers offer contactless, high‑accuracy linear measurement for applications ranging from actuators to stress testing.