Improving charging efficiency with workload scheduling in energy harvesting embedded systems

Yukan Zhang, Yang Ge, Qinru Qiu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

In energy harvesting embedded systems, if the harvested power is sufficient for the workload, extra power will be stored in the electrical energy storage (EES) bank. How much energy can be stored is affected by many factors including the efficiency of the energy harvesting module, the input/output voltage of the DC-DC converters, the status of the EES elements, and the characteristics of the workload. This paper investigates the impact of workload scheduling of the embedded system on the storage efficiency of the EES bank. We first provide an approximated but accurate power consumption model of the DC-DC converter. Based on this model, we analytically prove that an optimal workload schedule is to always execute high power task first. Experimental results confirm that proposed scheduling strategy outperforms all other possible scheduling and increases the amount of stored energy by up to 10.41% in average.

Original languageEnglish (US)
Title of host publicationProceedings of the 50th Annual Design Automation Conference, DAC 2013
DOIs
StatePublished - Jul 12 2013
Event50th Annual Design Automation Conference, DAC 2013 - Austin, TX, United States
Duration: May 29 2013Jun 7 2013

Publication series

NameProceedings - Design Automation Conference
ISSN (Print)0738-100X

Other

Other50th Annual Design Automation Conference, DAC 2013
CountryUnited States
CityAustin, TX
Period5/29/136/7/13

Keywords

  • Electrical energy storage
  • Energy harvesting embedded system
  • Scheduling

ASJC Scopus subject areas

  • Computer Science Applications
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Modeling and Simulation

Fingerprint Dive into the research topics of 'Improving charging efficiency with workload scheduling in energy harvesting embedded systems'. Together they form a unique fingerprint.

Cite this