Tuning Servo Systems for High Performance (Part 2)
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Among the most troubling tasks in machine building can be tuning the servo system to meet or exceed the performance specification. Invariably, we have all sat at the machine and asked ourselves, “What three numbers should I put in this proportional-integrated-derivative (PID) controller?” However, when tuning, it is not always about the PID gains. Many other factors affect the tuning and can be changed to improve the machine performance. This webcast will discuss aspects of controller design, including control loop structures, controller characteristics and using frequency-based tools for gain selection and machine characterization. This will be presented in two parts.
Part two will cover more advanced frequency domain usage, including different frequency responses (sensitivity, inverse feedforward and process sensitivity) and dealing with non-linearity, such as small signal analysis and friction.
Presenter Joseph Profeta, who has nearly three decades of experience working on challenging automation solutions for a variety of industries, will explain the steps he takes to optimize the performance of motion systems.
- Briefly review the basics of a frequency response
- Understand loop shaping by considering various frequency responses, including loop transmission, closed loop, plant, inverse feedforward, and process sensitivity responses
- Explore the effects that non-linearities, such as friction, low and high current, and load variation, have on system performance
Joseph Profeta, Ph.D., Director, Control Systems Group, Aerotech
Mark Hoske, Content Manager, CFE Media and Technology