Reset band for mitigatation of quantization induced performance degradation

TL;DR

This paper addresses performance degradation caused by quantization in reset control systems and proposes a reset band condition to mitigate this issue, validated through simulations and practical experiments.

Contribution

It introduces a novel reset band condition to reduce quantization-induced degradation in reset control, with new tuning guidelines and experimental validation.

Findings

Reset band reduces error by up to 285% in critical regions

Proposed method improves robustness against quantization effects

Validated through simulations and high-precision experiments

Abstract

Reset control has emerged as a viable alternative to popular PID, capable of outperforming and overcoming the linear limitations. However, in motion control systems, quantization can cause severe performance degradation. This paper investigates this degradation in practical systems and re-purposes the reset band condition in order to mitigate the same. Numerical simulations have been conducted on a mass based positioning system to analyze the cause of the quantization induced performance degradation. Moreover, a performance and robustness analysis was performed with the proposed solution. Finally, novel tuning guidelines are provided for estimating the required reset band parameter. Additionally, practical experiments have been conducted on a high precision motion system for validation. The experiments show by example that the reset band can reduce the error in the problematic region by up to 285% and hence shows the need and effectiveness of the proposed solution.