Automated Reset Controller Design with a Novel Structure for Improved Performance of an Industrial Motion Stage

Linear time-invariant (LTI) controllers suffer from inherent limitations as the waterbed effect and Bode's gain-phase relationship. Reset control, a nonlinear strategy involving the reset of linear controllers, offers a potential solution to overcome these traditional LTI limitations. Based on the describing function analysis, the reset...

Noise robustness improvement of reset control systems using measurement line filtering

Inherent limitations of linear control, including PID, are Bode's phase-gain relationship and the waterbed-effect. Literature showed that reset control can overcome these limitations. The 'Constant in Gain, Lead in Phase' (CgLp) reset element was developed, which can be used in combination with a conventional PID approach. The benefit is that...

Overcoming inherent performance limitations in industrial motion stages with reset control: A general approach to the design and implementation of reset controllers validated on an ASMPT AB383 wire bonder

Linear time-invariant controllers are undoubtedly the most popular type of regulators used in industrial applications, with the overwhelming majority of companies employing them. The reason is mainly given by their simple design methods. In particular, frequency domain predictive performance analysis and stability methods allow the use of...

Improving the noise robustness of reset controllers with an observer

The performance of linear control is limited by the waterbed effect, while the performance demands of industry are continuously increasing. Using non-linear control in the future is therefore unavoidable. Being non-linear, reset control is able to achieve better performance than linear control. However, the lack of robustness to measurement...