The process of acquiring the energy surrounding a system and converting it into usable electrical is termed power harvesting. In last few years, field harvesting has experienced significant growth due to ever increasing desire produce portable wireless electronics with extended life. Current devices must be designed include electrochemical batteries as source. use can troublesome their finite supply, which necessitates periodic replacement. case sensors that are placed in remote locations,...

Abstract Health monitoring of structures and people requires the integration sensors devices on various 3D curvilinear, hierarchically structured, even dynamically changing surfaces. Therefore, it is highly desirable to explore conformal manufacturing techniques fabricate integrate soft deformable complex curvilinear Although planar fabrication methods are not directly suitable manufacture surfaces, they can be combined with stretchable use transfer printing or assembly enable device...

This paper performs an analysis of maximum power output piezoelectric energy harvesters. It has been observed that there exists overall limit can be obtained by tuning harvesting circuits, including both linear and nonlinear. The significance the is it represents possible or capacity harvester. In other words, harvested always capped this regardless type circuit interface. optimal generalized electrical load impedance to reach are first directly using electromechanically coupled equations...

The concept of power harvesting works towards developing self-powered devices that do not require replaceable supplies. One important parameter defining the performance a piezoelectric system is efficiency system. However, an accepted definition energy does currently exist. This article will develop new for system, which rather than being defined through conservation as ratio fed into to maintain steady state output power, we consider strain over each cycle output. analogous material loss...

A piezoelectric based energy harvesting scheme is proposed here which places a capacitor before the load in conditioning circuit. It well known that impedance between and source contributes greatly to performance of system. The additional provides flexibility achieving optimal value can be used expand bandwidth theoretical model system derived response system, as function both resistance capacitance, studied. analysis shows dominated by bifurcation occurring electromechanical coupling...

The loss factor of an electromechanical system characterizes the induced piezoelectric damping for shunt applications, and it can also be used to represent power harvesting efficiency system. This paper investigates effect patch placement on factor, with aim finding optimal location same amount material. An analytical relationship between is presented discussed beam configurations. In addition, a structural model developed based wave propagation which accounts effects PZT obtain natural...

Power harvesting describes the process of acquiring ambient energy surrounding a system and converting it into usable electrical energy. Much work over past two decades has focused on conversion vibration sources using piezoelectric, electromagnetic electrostatic transduction. Attempts were made to obtain general model that could be applied any transduction mechanism. Of most interest is an generator was used by many researchers piezoelectric power harvesters. Two major results from are...

Nonlinearity has been successfully introduced into piezoelectric energy harvesting for power performance enhancement and bandwidth enlargement. While a great deal of emphasis placed by researchers on the structural design broadband effect, this article is motivated to investigate maximum representative type nonlinear harvesters, that is, monostable harvester. An equivalent circuit proposed analytically study explain system behaviors. The effect nonlinearity modeled as stiffness element...

Deep learning has seen tremendous growth over the past decade. It set new performance limits for a wide range of applications, including computer vision, speech recognition, and machinery health monitoring. With abundance instrumentation data availability high computational power, deep continues to prove itself as an efficient tool extraction micropatterns from big repositories. This study presents comparative feature capabilities using stacked autoencoders considering use expert domain...

In a piezoelectric energy harvesting (PEH) system, the dynamics and harvested power vary with different base excitation. Accurately predicting capability under types of excitation is importance for analysis design PEH systems. Many studies started modeling such an electromechanically coupled system harmonic However, in real-world scenarios, environmental vibration might be irregular impulsive. This article extends equivalent impedance from single to multiple harmonics describing complex...

Abstract Maintaining high-energy orbit oscillation of a nonlinear vibration energy harvester (VEH) is the key to achieve high-performance, broadband harvesting. Conventional orbit-jump strategies, such as mechanical modulation or electrical control methods, need consume limited harvested and may unfavourably reduce harvesting efficiency. To avoid undesired consumption, we focus on utilizing overlooked wind assist VEH attain preferred orbit. The novel method proposed in this letter based...

Power harvesting devices are designed to convert the ambient energy surrounding a system usable electric energy. The strong desire create self-powered systems, which do not rely on traditional sources such as electrochemical batteries has led rapid growth of this field. One type is use piezoelectric materials directly transform vibration electrical In majority applications configured bimorph bender, where two patches piezoceramic material can be electrically connected in either series or...

This paper studies the piezoelectric damping of resistively shunted beams induced by conversion vibration energy into electrical that is dissipated in resistor through Joule heating. Significant contributions have been made modeling and development resistive shunt technique; however, many approaches involve complex models require use numerical methods to determine system parameters predict damping. develops a closed-form solution for optimal parameter system. The model validated experimental...

Abstract This work in progress describes the study of a Mechanical Engineering Technology Program's experiences immediate aftermath Covid-19. Covid-19 and effects social distancing as precaution has had widespread significant all aspects life, including education. As with many institutions, (MET) department at ___ University, undergone wide range adjustments accommodations since campus's abrupt closure spring 2020 to try continue deliver quality education under given circumstances. One...