Getting the Message About Noise Across, Loud and Clear [Focus on Education]

Controlling the position of an actuator to within a single atom distance can be a daunting challenge. However, such demands are becoming routine in applications. Good mechanical design and sensor choice are important; however, it is critical to have a comprehensive understanding of the noise processes involved with the system. The sensor noise, input noise, and disturbances will ultimately define the resolution and performance. Being able to quantify noise sources and predict closed-loop resolution is a valuable skill that is sometimes overlooked in undergraduate control and mechatronics education.