In recent years, road piezoelectric energy harvesting (RPEH) has attracted great attention from industry and academia, as it can provide power to traffic ancillary facilities and low-power wireless sensor devices to s...In recent years, road piezoelectric energy harvesting (RPEH) has attracted great attention from industry and academia, as it can provide power to traffic ancillary facilities and low-power wireless sensor devices to support car networking and intelligent transportation. The output power of RPEH in a recent research project demonstrated a watt level RPEH. In this proposal, we propose to harvest energy from piezoelectric modules (also called stacks) to power selected highways, tolls, and bridges in Pennsylvania. The project incorporates electrical, mechanical, and civil engineering works. The proposed smart highway RPEH will be conducted using optimization parameters to evaluate the system performance and trade-offs. MATLAB will be used with other optimization solvers in problem modeling and optimization. During this project, an RPEH hardware system will be constructed. The system will include a piezoelectric module, rectifier (AC-DC), Storage battery, data acquisition system (DAQ), and computer. The captured data will be analyzed using MATLAB/Simulink. The results show that optimum harvested parameters were addressed when the thickness is selected as 2 mm.展开更多
This paper proposes a compact model for carbon nanotube field effect transistor（CNTFET） based on surface potential and conduction band minima. The proposed model relates the I–V characteristics to chirality under q...This paper proposes a compact model for carbon nanotube field effect transistor（CNTFET） based on surface potential and conduction band minima. The proposed model relates the I–V characteristics to chirality under quantum capacitance limit. C–V characteristics have been efficiently modelled for different capacitance models which are used to find the relationship between CNT surface potential and gate voltage. The role of different capacitances is discussed and it has been found that the proposed circuit compact model strictly follows quantum capacitance limit. The proposed model is efficiently designed for circuit simulations as it denies self-consistent numerical simulation. Furthermore, this compact model is compared with experimental results. The model has been used to simulate an inverter using HSPICE.展开更多
This project strived to develop a prototype road piezoelectric energy harvester RPEH system using five Lead Zirconate Titanate (PZT) PZT 5H modules (stacks) that are embedded in the road by means of a housing unit to ...This project strived to develop a prototype road piezoelectric energy harvester RPEH system using five Lead Zirconate Titanate (PZT) PZT 5H modules (stacks) that are embedded in the road by means of a housing unit to harvest energy from vehicles stressing the modules. The work is an extension of our previous published work in the same journal. The design considered many factors to optimize the harvested energy. The proposed system first captures mechanical energy using a designed module that transfers the energy to the piezoelectric stacks. Then the captured energy will be converted into electrical energy by the piezoelectric phenomenon. The harvested energy is stored in a storage device, then analyzed by an oscilloscope through the acquisition of the harvested voltage, current, power, and energy. When testing the RPEH with the wheel tracking machine, varying resistor loads where connected to the output of the RPEH to address the optimum power delivered to the load. The optimum load was found to be 950 kΩ, and the optimal harvested energy was recorded as 45 uJ.展开更多
针对通用测试系统对系统统一模型的迫切需求以及目前ATE(AutomaticTest Equipment)模型化设计的不足,基于信号建立了一套完整、有效的ATE系统模型.此模型将ATE系统的硬件资源以及UUT(Unit Under Test)均进行了模型化处理.提出了基于TFF(...针对通用测试系统对系统统一模型的迫切需求以及目前ATE(AutomaticTest Equipment)模型化设计的不足,基于信号建立了一套完整、有效的ATE系统模型.此模型将ATE系统的硬件资源以及UUT(Unit Under Test)均进行了模型化处理.提出了基于TFF(Test Foundation Framework)的基本信号模型;提出了完全基于信号的仪器驱动模型;提出了基于测试与诊断相结合思想的UUT模型;提出了基于模型间信息共享的思想和路径以逻辑开关描述思想的路径模型.该模型体系为系统资源配置、仪器可互换、测试程序自动生成以及故障诊断提供了强有力的模型基础,从而大大加快了ATE的设计过程,从很大程度上降低了开发成本.展开更多
文摘In recent years, road piezoelectric energy harvesting (RPEH) has attracted great attention from industry and academia, as it can provide power to traffic ancillary facilities and low-power wireless sensor devices to support car networking and intelligent transportation. The output power of RPEH in a recent research project demonstrated a watt level RPEH. In this proposal, we propose to harvest energy from piezoelectric modules (also called stacks) to power selected highways, tolls, and bridges in Pennsylvania. The project incorporates electrical, mechanical, and civil engineering works. The proposed smart highway RPEH will be conducted using optimization parameters to evaluate the system performance and trade-offs. MATLAB will be used with other optimization solvers in problem modeling and optimization. During this project, an RPEH hardware system will be constructed. The system will include a piezoelectric module, rectifier (AC-DC), Storage battery, data acquisition system (DAQ), and computer. The captured data will be analyzed using MATLAB/Simulink. The results show that optimum harvested parameters were addressed when the thickness is selected as 2 mm.
文摘This paper proposes a compact model for carbon nanotube field effect transistor（CNTFET） based on surface potential and conduction band minima. The proposed model relates the I–V characteristics to chirality under quantum capacitance limit. C–V characteristics have been efficiently modelled for different capacitance models which are used to find the relationship between CNT surface potential and gate voltage. The role of different capacitances is discussed and it has been found that the proposed circuit compact model strictly follows quantum capacitance limit. The proposed model is efficiently designed for circuit simulations as it denies self-consistent numerical simulation. Furthermore, this compact model is compared with experimental results. The model has been used to simulate an inverter using HSPICE.
文摘This project strived to develop a prototype road piezoelectric energy harvester RPEH system using five Lead Zirconate Titanate (PZT) PZT 5H modules (stacks) that are embedded in the road by means of a housing unit to harvest energy from vehicles stressing the modules. The work is an extension of our previous published work in the same journal. The design considered many factors to optimize the harvested energy. The proposed system first captures mechanical energy using a designed module that transfers the energy to the piezoelectric stacks. Then the captured energy will be converted into electrical energy by the piezoelectric phenomenon. The harvested energy is stored in a storage device, then analyzed by an oscilloscope through the acquisition of the harvested voltage, current, power, and energy. When testing the RPEH with the wheel tracking machine, varying resistor loads where connected to the output of the RPEH to address the optimum power delivered to the load. The optimum load was found to be 950 kΩ, and the optimal harvested energy was recorded as 45 uJ.
文摘针对通用测试系统对系统统一模型的迫切需求以及目前ATE(AutomaticTest Equipment)模型化设计的不足,基于信号建立了一套完整、有效的ATE系统模型.此模型将ATE系统的硬件资源以及UUT(Unit Under Test)均进行了模型化处理.提出了基于TFF(Test Foundation Framework)的基本信号模型;提出了完全基于信号的仪器驱动模型;提出了基于测试与诊断相结合思想的UUT模型;提出了基于模型间信息共享的思想和路径以逻辑开关描述思想的路径模型.该模型体系为系统资源配置、仪器可互换、测试程序自动生成以及故障诊断提供了强有力的模型基础,从而大大加快了ATE的设计过程,从很大程度上降低了开发成本.
