On the Jitter Sensitivity of an Adaptive Digital Controller: A Computational Simulation Study

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Abstract

In many real
-
time control applications, the ability to accurately track a reference trajectory with stable, pre
-
specified
closed
-
loop dynamics is highly desirable. For fixed gain control systems, the detrimental impact of jitter
on performance has been relatively well studied. However, research that quantifies the possible impact of jitter on
the performance and relative stab
ility of adaptive control schemes is comparatively much rarer. With technology
advances now making real
-
time adaptive control a viable option for high
-
speed applications, this situation requires
further investigation. In this paper, the jitter sensitivity
of a digital parameter adaptive tracking control system is
studied using precise software
-
in
-
the
-
loop computational simulations. The results obtained indicated that the
adaptive controller was significantly susceptible to jitter. In particular, key metrics
such as the phase margin, gain
margin, settling time, overshoot and root mean square parameter and tracking errors were all significantly
impacted following the introduction of 5% jitter in the controller. The obtained data are thought to be the first
det
ailed results of this kind and present useful insights into the practical complexities when innovating adaptive
real
-
time tracking control systems and indicate that specialized controller implementations that minimize jitter
should be employed and that fur
ther analysis is warranted
.
Original languageEnglish
Number of pages16
JournalInternational Journal of Engineering and Technology Innovation
Early online date14 Aug 2019
Publication statusE-pub ahead of print - 14 Aug 2019

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Jitter
Controllers
Control systems
Gain control
Real time control
Trajectories

Cite this

@article{77a4b62a4f7a44c4b350088c4ed7a166,
title = "On the Jitter Sensitivity of an Adaptive Digital Controller:: A Computational Simulation Study",
abstract = "In many real-time control applications, the ability to accurately track a reference trajectory with stable, pre-specified closed-loop dynamics is highly desirable. For fixed gain control systems, the detrimental impact of jitter on performance has been relatively well studied. However, research that quantifies the possible impact of jitter on the performance and relative stability of adaptive control schemes is comparatively much rarer. With technology advances now making real-time adaptive control a viable option for high-speed applications, this situation requires further investigation. In this paper, the jitter sensitivity of a digital parameter adaptive tracking control system is studied using precise software-in-the-loop computational simulations. The results obtained indicated that the adaptive controller was significantly susceptible to jitter. In particular, key metricssuch as the phase margin, gain margin, settling time, overshoot and root mean square parameter and tracking errors were all significantly impacted following the introduction of 5{\%} jitter in the controller. The obtained data are thought to be the first detailed results of this kind and present useful insights into the practical complexities when innovating adaptive real-time tracking control systems and indicate that specialized controller implementations that minimize jitter should be employed and that further analysis is warranted.",
author = "Michael Short and Fathi Abugchem",
year = "2019",
month = "8",
day = "14",
language = "English",
journal = "International Journal of Engineering and Technology Innovation",
issn = "2223-5329",
publisher = "Taiwan Association of Engineering and Technology Innovation",

}

TY - JOUR

T1 - On the Jitter Sensitivity of an Adaptive Digital Controller:

T2 - A Computational Simulation Study

AU - Short, Michael

AU - Abugchem, Fathi

PY - 2019/8/14

Y1 - 2019/8/14

N2 - In many real-time control applications, the ability to accurately track a reference trajectory with stable, pre-specified closed-loop dynamics is highly desirable. For fixed gain control systems, the detrimental impact of jitter on performance has been relatively well studied. However, research that quantifies the possible impact of jitter on the performance and relative stability of adaptive control schemes is comparatively much rarer. With technology advances now making real-time adaptive control a viable option for high-speed applications, this situation requires further investigation. In this paper, the jitter sensitivity of a digital parameter adaptive tracking control system is studied using precise software-in-the-loop computational simulations. The results obtained indicated that the adaptive controller was significantly susceptible to jitter. In particular, key metricssuch as the phase margin, gain margin, settling time, overshoot and root mean square parameter and tracking errors were all significantly impacted following the introduction of 5% jitter in the controller. The obtained data are thought to be the first detailed results of this kind and present useful insights into the practical complexities when innovating adaptive real-time tracking control systems and indicate that specialized controller implementations that minimize jitter should be employed and that further analysis is warranted.

AB - In many real-time control applications, the ability to accurately track a reference trajectory with stable, pre-specified closed-loop dynamics is highly desirable. For fixed gain control systems, the detrimental impact of jitter on performance has been relatively well studied. However, research that quantifies the possible impact of jitter on the performance and relative stability of adaptive control schemes is comparatively much rarer. With technology advances now making real-time adaptive control a viable option for high-speed applications, this situation requires further investigation. In this paper, the jitter sensitivity of a digital parameter adaptive tracking control system is studied using precise software-in-the-loop computational simulations. The results obtained indicated that the adaptive controller was significantly susceptible to jitter. In particular, key metricssuch as the phase margin, gain margin, settling time, overshoot and root mean square parameter and tracking errors were all significantly impacted following the introduction of 5% jitter in the controller. The obtained data are thought to be the first detailed results of this kind and present useful insights into the practical complexities when innovating adaptive real-time tracking control systems and indicate that specialized controller implementations that minimize jitter should be employed and that further analysis is warranted.

M3 - Article

JO - International Journal of Engineering and Technology Innovation

JF - International Journal of Engineering and Technology Innovation

SN - 2223-5329

ER -