Demystifying PID Controllers: Implementation and Tuning in Embedded System Design

Abstract: Proportional-Integral-Derivative (PID) controllers are needed for ensuring the accuracy and stability of embedded systems. In this research, we explore the role of PID controllers in robust feedback control for a range of applications. We explore the theoretical underpinnings of the proportional, integral, and derivative terms, evaluating their respective contributions and their combined effects on system response. This paper also includes practical implementation approaches for embedded design. It discusses significant challenges faced in embedded control systems, such as integral wind-up, the impacts of sampling intervals, output saturation, and noise reduction for the derivative term. Finally, two well-known tuning algorithms, Manual Tuning and the Ziegler-Nichols, are set out as systematic approaches to maximum controller performance. This research presents an applied manual for engineers designing embedded systems for implementing and tuning PID controllers effectively to deliver stable, accurate, and responsive system performance.

Keywords: PID Control, BLDC Motor, PID Design, Embedded Systems, Motor Control Tuning