Computational Delay in Vehicles and Its Effect on Real Time Scheduling

Jain, Abhinna

Publication:
Computational Delay in Vehicles and Its Effect on Real Time Scheduling

dc.contributor.advisor	Mani C Krishna
dc.contributor.advisor	Israel Koren
dc.contributor.author	Jain, Abhinna
dc.contributor.department	University of Massachusetts Amherst
dc.contributor.department	Electrical & Computer Engineering
dc.date	2023-09-23T06:55:14.000
dc.date.accessioned	2024-04-26T21:16:55Z
dc.date.available	2012-04-10T00:00:00Z
dc.date.issued	2012-01-01
dc.date.submitted	May
dc.description.abstract	Present research into critical embedded control systems tends to focus on the computational elements and largely ignore the link between the computational and physical elements. This link is very important since the computational capability of the computer can greatly affect the performance and dynamics of the system it controls. The control computer is in the feedback loop of control systems and contributes to feedback delay in addition to already existing mechanical delays. While mechanical delays are compensated in control design, variable computational delays cause system to underperform in its intended physical behavior and impose a cost in terms of fuel or time. For this reason, the scheduler in a real-time operating systems should not focus only on the task deadlines, but also on efficient scheduling which minimizes the effect of computational delay on the controlled plant. The proposed work provides a systematic framework to manage and evaluate the implications of computational delay in vehicles. The work also includes cost sensitive real-time control task scheduling heuristics and Dynamic Voltage Scaling (DVS) for better energy/thermal control. We show through simulations that our heuristic achieves a significant improvement in cost over the traditional real-time scheduling algorithm Earliest Deadline First (EDF) and show that it can adjust according to energy constraints imposed on the system.
dc.description.degree	Master of Science in Electrical and Computer Engineering (M.S.E.C.E.)
dc.identifier.doi	https://doi.org/10.7275/2754936
dc.identifier.uri	https://hdl.handle.net/20.500.14394/47749
dc.relation.url	https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1933&context=theses&unstamped=1
dc.source.status	published
dc.subject	CPS
dc.subject	Real time systems
dc.subject	delay
dc.subject	scheduling
dc.subject	dvs
dc.subject	cost function
dc.subject	Computer and Systems Architecture
dc.subject	VLSI and Circuits, Embedded and Hardware Systems
dc.title	Computational Delay in Vehicles and Its Effect on Real Time Scheduling
dc.type	campus
dc.type	article
dc.type	thesis
digcom.contributor.author	isAuthorOfPublication\|email:abhinnajain87@gmail.com\|institution:University of Massachusetts Amherst\|Jain, Abhinna
digcom.date.embargo	2012-04-10T00:00:00-07:00
digcom.identifier	theses/823
digcom.identifier.contextkey	2754936
digcom.identifier.submissionpath	theses/823
dspace.entity.type	Publication