Mahidur R. Sarker

An optimization of rectangular shape piezoelectric energy harvesting cantilever beam for micro devices

The vibration based piezoelectric energy harvester system is considered as an alternative solution for micro-devices, especially for remote area. This paper presents an optimization approach to determine the optimal cantilever beam of a rectangular shape piezoelectric energy harvester to run the micro devices in which power is unavailable. In this study, PZT-5H material has been utilized. The motivation behind this research is to maximize the power behavior by optimizing the cantilever beam’s length, width and thickness. Therefore, the proposed rectangular cantilever beam has been optimized by using modified particle swarm optimization (MPSO) algorithm and designed in COMSOL software. Finally, the optimization results of MPSO are compared with other technique to validate the outcomes. The findings show that the performance of the proposed technique is better than other technique in terms of quality and convergence speed.

Designing a Battery-Less Piezoelectric based Energy Harvesting Interface Circuit with 300 mV Startup Voltage

This paper presents a designing a battery-less piezoelectric based energy harvesting interface circuits with 300mV step-up voltage. A technique (i.e., DC-DC Step-Up converter) has chosen for designing the startup voltage with low voltage energy (i.e., 300mV). The proposed method consumes very little power, and is especially suitable for the ambient environmental source, where energy harvested power is very low. The energy harvesting interface circuit consists of MOSFET bridge ac-dc rectifier, voltage regulator, dc-dc step-up converter and an energy storage device with capacitor at the output terminal, replacing this by external battery. This paper will study results these important issues regarding the efficiencies of the energy harvesting power conversion interface circuits considering the storage device low voltage. The achievement of our development circuit is able to boost up minimum 1.67 V for input DC voltage of 300mV. The overall circuit efficiency is greater than 80 % following the simulation results. This research has focused on the application of Wireless Sensor Network (WSN) and bio-medical device can be operated without battery.

A New Method for a Piezoelectric Energy Harvesting System Using a Backtracking Search Algorithm-Based PI Voltage Controller

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.

Modelling and Simulation an AC-DC Rectifier Circuit Based on Piezoelectric Vibration Sensor for Energy Harvesting System

This paper presents the modeling of a full-wave rectifier circuit based on piezoelectric vibration transducer for energy-harvester system. Piezoelectric vibration crystals are a viable means of harvesting energy for low-power embedded systems e.g. wireless sensor network. Distinct power handling circuits are assessed with the presence of piezoelectric vibration based energy harvesting transducer. Inside the interface circuit, the voltage should be started up when the AC input voltage is very low to supply a regulated DC voltage up to 2V. An active technique is chosen to design an ultra-low power circuit from a piezoelectric vibration transducer. MOSFET bride ac–dc rectifier, energy storage device e.g. capacitor and boost converter with regulator are the common components of the energy harvesting circuits. An integrated promoter ac-dc rectifier circuit and boost converter that accept a maximum input voltage of 0.3V and provide a regulated output voltage of 2V serve as the supply. The MOSFET and thyristor are considered to develop the proposed circuit replacing conventional ac-dc rectifier due to low input voltage at which diode does not work.

Improved proportional-integral voltage controller for a piezoelectric energy harvesting system converter utilizing lightning search algorithm

ABSTRACT This paper presents a relatively new meta-heuristic optimization technique known as the Lightning Search Algorithm (LSA) for developing an optimal proportional-integral (PI) voltage controller for a piezoelectric energy harvesting system (PEHS) converter. In the conventional PI voltage controller, a trial and error procedure is normally used to obtain optimal values for the proportional gain (Kp), and integral gain (Ki). This procedure is time consuming and does not conduct to suitable solutions. To overcome the exhaustive traditional trial-and-error procedure, the LSA optimization algorithm is proposed for obtaining optimal Kp and Ki values for the PI voltage controller.

Designing a low voltage energy harvesting interface circuit utilizing piezoelectric vibration transducer

This paper presents designing a low voltage energy harvesting interface circuit utilizing piezoelectric vibration transducer (PVT). PVT with energy harvesting interface circuit (EHIC) is considered as an alternative power source to run the low power devices, especially for remote area where power is unavailable. A method (i.e., switch-mode boost converter) has chosen for designing the low-power EHIC for micro devices applications. The PVT has been analyzed with different frequency and the output voltage of PVT is used as an input source to design EHIC. The EHIC consists of non-controlled rectifier, filter, switch-mode open loop boost converter and an energy storage device with capacitor at the output terminal. Finally, the complete EHIC has designed and simulated using Matlab Simulink software.

Cantilever beam vibration from fluid interactions with triangular shape blunt body for energy harvesting application

This paper presents a cantilever beam vibration from fluid interactions with triangular shape blunt-body for energy harvesting application. The cantilever beam produces mechanical energy by interacting between fluid and blunt-body and then converts it into an electrical energy through the piezoelectric effect. The cantilever beam has been developed in the COMSOL software by using the finite element method. In this work, Reynolds number, the lift and drag coefficients have been chosen to analyze two blunt-bodies of circular shape and triangular shape to identify the right blunt-body for optimized cantilever based energy harvester design. To harvest the energy from the vibration viewpoint, it is essential to calculate the frequency of vibrations at different fluid speeds. The main motive here is to seek a higher synchronized region of frequencies for the oscillation amplitudes for a range of fluid velocity and to calculate the lift and drag coefficients. The result of the proposed method outperforms better than the other compared methods and the result proved that the triangular shape blunt-body has higher lifting force compared to the circular shape that produces 0.5V.

Performance evaluation modeling a Microelectromechanical system based Finite Element piezoelectric Shear Actuated Beam

This paper presents the modeling a Microelectromechanical systems (MEMS) based Piezoelectric shear actuated beam by using COMSOL Multiphysics software of version 4.3a. The overall dimensions model of the beam is of 0.1-m long, 0.03-m width and 0.018-m thickness. For this model the structural mechanics boundary conditions are of the cantilever beam is fixed at its surfaces at x = 0 and that all other surfaces are free. In this model applied, the different materials (i.e., Silicon, Titanium, Barium titanate, Lead zirconate titanate, Material) with voltages between the top and bottom surfaces of the piezoceramic domain (i.e., 15V, 35V) have been analyzed. Firstly, select the Structural Mechanics of the Piezoelectric Devices and analyzed changing the selecting physics. Secondly, defining the Geometry on deflection of sandwiched beam is setting the boundary condition and analyzed changing of the beam. Thirdly, the beam is composed of a 0.001-m thick flexible foam core sandwiched by two 0.002-m thick silicon and titanium layers. In the Fourth step, bend of beam is analyzed by changing both materials of sandwiched beam and mashing of the defection beam is display by changing both thickness and electric potential. Finally, the results of analysis allowed to conclude us to design a piezoelectric shear actuated beam with different ranges and resolutions, under the condition of changing both thickness and material of electrodes gives the optimum deflection of 0.0308-um and 0.0815-um under 15V input voltage with different materials. Streszczenie. W artykule zaprezentowano metode projektowania ukladow typu MEMS na przykladzie piezoelektrycznego silownika. Dla silownika zaproponowano model numeryczny oraz warunki brzegowe. Przedstawiono obliczenia dla roznych materialow i roznych konstrukcji. Modelowanie wlaściwości system MEMS na przykladzie silownika piezoelektrycznego

Design, simulation and synthesis of wheelchair controller using Fuzzy logic

This paper describes a Fuzzy Logic Controller (FLC) algorithm for designing a Wheelchair Controller (WC). The controller enables the movement of wheelchair and makes brake in an unstructured environment by the WC sensor to avoid any encountered obstacles. The WC is found to be able to react to the environment appropriately during its navigation to avoid crashing with obstacles by turning to the proper angle while moving. To design the controller unit, a speed sensor and a distance sensor etc are placed in front of the wheelchair for its functionality. The numerous data is used to evaluate the algorithm which control an output signal for the brake-power, using by the input signals of speed sensor and distance sensor. The Fuzzy logic algorithm has proven a commendable solution in dealing with certain control problems when the situation is ambiguous. One of the main difficulties faced by conventional control systems is the inability to operate in a condition with incomplete and imprecise information. As the complexity of a situation increases, a traditional mathematical model will be difficult to implement. Fuzzy logic is a tool for modeling uncertain systems by facilitating common sense reasoning in decision-making in the absence of complete and precise information. In this paper, the WC is designed and simulated based on the theories of Fuzzy logic in MATLAB software. The MATLAB codes of WC have been written using VHDL language for implementing the separate modules of the Fuzzifier, Fuzzy Rule Base, Inference mechanism and Defuzzifier as hardware blocks. The generated VHDL codes have synthesized using synthesis tool for VLSI implementation.