Improving energy efficiency for energy harvesting embedded systems

Yang Ge, Yukan Zhang, Qinru Qiu

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

5 Scopus citations

Abstract

While the energy harvesting system (EHS) supplies green energy to the embedded system, it also suffers from uncertainty and large variation in harvesting rate. This constraint can be remedied by using efficient energy storage. Hybrid Electrical Energy Storage (HEES) system is proposed recently as a cost effective approach with high power conversion efficiency and low self-discharge. In this paper, we propose a fast heuristic algorithm to improve the efficiency of charge allocation and replacement in an EHS/HEES equipped embedded system. The goal of our algorithm is to minimize the energy overhead on the DC-DC converter while satisfying the task deadline constraints of the embedded workload and maximizing the energy stored in the HEES system. We first provide an approximated but accurate power consumption model of the DC-DC converter. Based on this model, the optimal operating point of the system can be analytically solved. Integrated with the dynamic reconfiguration of the HEES bank, our algorithm provides energy efficiency improvement and runtime overhead reduction compared to previous approaches.

Original languageEnglish (US)
Title of host publication2013 18th Asia and South Pacific Design Automation Conference, ASP-DAC 2013
Pages497-502
Number of pages6
DOIs
StatePublished - May 20 2013
Event2013 18th Asia and South Pacific Design Automation Conference, ASP-DAC 2013 - Yokohama, Japan
Duration: Jan 22 2013Jan 25 2013

Publication series

NameProceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC

Other

Other2013 18th Asia and South Pacific Design Automation Conference, ASP-DAC 2013
CountryJapan
CityYokohama
Period1/22/131/25/13

Keywords

  • Bank reconfiguration
  • Energy harvesting system
  • Hybrid electrical energy storage system

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering

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  • Cite this

    Ge, Y., Zhang, Y., & Qiu, Q. (2013). Improving energy efficiency for energy harvesting embedded systems. In 2013 18th Asia and South Pacific Design Automation Conference, ASP-DAC 2013 (pp. 497-502). [6509645] (Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC). https://doi.org/10.1109/ASPDAC.2013.6509645