Abstract
This paper presents a new method for a vibration-based piezoelectric energy harvesting system using a backtracking search algorithm (BSA)-based proportional-integral (PI) voltage controller. This technique eliminates the exhaustive conventional trial-and-error procedure for obtaining optimized parameter values of proportional gain (Kp), and integral gain (Ki) for PI voltage controllers. The generated estimate values of Kp and Ki are executed in the PI voltage controller that is developed through the BSA optimization technique. In this study, mean absolute error (MAE) is used as an objective function to minimize output error for a piezoelectric energy harvesting system (PEHS). The model for the PEHS is designed and analyzed using the BSA optimization technique. The BSA-based PI voltage controller of the PEHS produces a significant improvement in minimizing the output error of the converter and a robust, regulated pulse-width modulation (PWM) signal to convert a MOSFET switch, with the best response in terms of rise time and settling time under various load conditions.
Highlights
The energy harvesting from the ambient energy sources, such as solar, wind, thermal, sound, vibration, solid waste, etc., are commonly popular now-a-days because of rising power demand [1,2,3,4]
Along with the renewable energy generation methods, micro-level energy harvesting has become the focus of new researchers and developers to power ultra-low power devices at remote or hard-to-reach zones
The block diagram of a piezoelectric energy harvesting system (PEHS) is shown in Figure 1; it can be summarized into three core components: piezoelectric devices, the power electronic interface, and electrical energy storage
Summary
The energy harvesting from the ambient energy sources, such as solar, wind, thermal, sound, vibration, solid waste, etc., are commonly popular now-a-days because of rising power demand [1,2,3,4]. Among them, harvesting the micro-level energy utilizing piezoelectric vibration transducers (PVT) is a greater concern to be researched [5,6,7,8]. One of the most popular power electronic converters for energy harvesting applications is a single-direction DC-DC converter. The rest of the paper is organized as follows: Section 2 describes the design of the PI voltage controller based on BSA for a PEHS; S2e. Dcteiosingn PpIrVesoelntatgsethCeonptroplleorseBdasBedSAon-PBISvAolftoargPeEcHoSntroller for a vibration-based PEHS; Section 4 presents a sTimheutlraatdioitinonmaloadnedl PpoI pvuollatraPgIeccoonntrtorlolellre, rufsoesr ttwheo PloEoHpsSfourticloiznitnrogl.tOhneepirsotphoe sinedneBr ScuArrteencthnique; Sectionc5onptrroelsleonotps athnde ethxepoetrhiemr eisnthael soeutt-eurpv;oSlteacgteiocnon6trpolrelosoepn.tBsStAheisreassuylsttsemanadticdmisectuhossdioton;itaernadte, the contchlruosuigohn aisll goifvtehne ipnoSsseicbtlieocnon7f.igurations of a search space algorithm developed by [27]
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