Modeling, Simulation, and Implementation of Fast Settling Switched PI Controller for MOX Integrated Pt Microheater

Samarth Singh, Dharmendra Kumar Sharma, Kaushal Kishore, Bhausaheb Ashok Botre, Shaikh Ali Akbar

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)


This paper presents a sensor system with temperature control of platinum microheater using a combined control strategy of open-loop and closed-loop control. The method proposed in this paper modifies the proportional integral control for faster response under sampling time constraint of large sampling interval, as a large sampling interval between two control commands slow the response. The initial quick temperature rising open-loop response of microheater contributes to faster rise time, and then, it is switched to closed-loop control when the quick initial rise has taken place, hence termed open-loop to closed-loop switched proportional integral (OLCLS PI) control. The settling time obtained by OLCLS PI and PI are 3 and 14 s, respectively, for 2% accuracy, thereby providing faster response than PI. The work is studied with elaborate modeling and simulation using MATLAB, and a practical implementation on embedded platform is presented using an in-house developed MOX-based gas sensor, which utilizes a platinum microheater.

Original languageEnglish
Article number8447201
Pages (from-to)8549-8557
Number of pages9
JournalIEEE Sensors Journal
Issue number20
Publication statusPublished - 15 Oct 2018
MoE publication typeA1 Journal article-refereed


  • Fast settling
  • integrated gas sensor
  • open loop to closed loop switched proportional integral (OLCLS PI) control
  • platinum microheater
  • proportional integral temperature controller
  • settling time


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