# An optimal PID controller via LQR for standard second order plus time delay systems

> Research article (ISA Transactions, 2015) · cited 62× · AI/ML

**Wikidata**: [openalex:W2181385033](https://www.wikidata.org/wiki/openalex:W2181385033)  
**Source**: https://4ort.xyz/entity/an-optimal-pid-controller-via-lqr-for-standard-second-order-plus-time-delay-systems