利用压电材料的振动能量收集及半主动控制研究
发布时间：2019-03-24 13:01
【摘要】：振动在自然界中普遍存在。但振动通常对结构是有害的,因此,对振动进行控制具有重要意义。但振动控制中的主动控制系统体积庞大、且耗能多等,而被动控制环境适应能力比较差,因而,半主动控制在很多场合成为首选方案。本文将压电半主动控制与压电能量收集技术相结合,在有效控制振动的同时,还可以实现能量收集。论文首先结合压电材料的机电耦合特性,对非线性同步开关阻尼(SSD)的半主动控制系统建立了理论模型。在此基础上分析了SSD技术(包括SSDI、SSDS、SSDV、改进型SSDS)的工作原理,并推导出了各个控制方法在一个周期内的机电转换能量值的表达式。针对于该技术中的关键技术-开关设计,本文采用了一种无源峰值检测开关电路实现其功能,并详细推导了其与SSDI、SSDS技术相结合时可以实现不同的闭合时间。同时,通过实验的方法确定了该半主动控制系统中SSDV技术的最优外接电压;其次,对半主动控制系统的实现电路进行了改进,将压电元件在振动过程中产生的电荷输出或存储。从理论上分析了其工作原理,详细推导了其输出电压和输出功率;最后,本文还将能量收集技术与SSDV半主动控制相结合,依据实验结果,设计适当的稳压电路,通过一定的开关控制策略,为SSDV半主动控制系统提供稳定的2.5v直流电压,从而实现能量自供给。半主动控制系统结构简单且易于实现,同时本文中所采用的无源开关控制电路功耗极低,可以实现半主动控制系统的能量自供给。通过实验对比发现SSDS、改进型SSDS、SSDI及SSDV的抑振效果逐渐增强,与理论推导结果相吻合。其中,SSDV在振动能量收集电压2.5v的作用下,达到了较好的控制效果。
[Abstract]:Vibration is common in nature. However, vibration is usually harmful to structures, so it is important to control vibration. However, the active control system in vibration control is large in volume and energy consuming, but the adaptability of passive control environment is poor. Therefore, semi-active control has become the first choice in many situations. In this paper, piezoelectric semi-active control and piezoelectric energy collection technology are combined to control vibration effectively and realize energy collection at the same time. Based on the electromechanical coupling characteristics of piezoelectric materials, a theoretical model for the semi-active control system of nonlinear synchronous switching damping (SSD) is established in this paper. On this basis, the working principle of SSD technology (including the improved SSDI,SSDS,SSDV, SSDS) is analyzed, and the expressions of the electromechanical conversion energy values of each control method within a period are derived. For the key technology of this technology-switch design, this paper adopts a passive peak detection switch circuit to realize its function, and deduces in detail that it can realize different closing time when it is combined with SSDI,SSDS technology. At the same time, the optimal external voltage of the SSDV technology in the semi-active control system is determined by experiment. Secondly, the circuit of the semi-active control system is improved to output or store the charge generated by the piezoelectric element in the process of vibration. Its working principle is analyzed theoretically, and its output voltage and output power are deduced in detail. Finally, the energy collection technology is combined with SSDV semi-active control. According to the experimental results, a suitable voltage regulator circuit is designed to provide a stable 2.5v DC voltage for the SSDV semi-active control system through a certain switching control strategy. Thus the self-supply of energy can be realized. The structure of the semi-active control system is simple and easy to implement. At the same time, the passive switching control circuit adopted in this paper has very low power consumption, which can realize the energy self-supply of the semi-active control system. Through the experimental comparison, it is found that the anti-vibration effect of SSDS, improved SSDS,SSDI and SSDV is gradually enhanced, which is in agreement with the theoretical results. Among them, SSDV has achieved better control effect under the action of 2.5 v vibration energy collection voltage.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB53
本文编号：2446348
[Abstract]:Vibration is common in nature. However, vibration is usually harmful to structures, so it is important to control vibration. However, the active control system in vibration control is large in volume and energy consuming, but the adaptability of passive control environment is poor. Therefore, semi-active control has become the first choice in many situations. In this paper, piezoelectric semi-active control and piezoelectric energy collection technology are combined to control vibration effectively and realize energy collection at the same time. Based on the electromechanical coupling characteristics of piezoelectric materials, a theoretical model for the semi-active control system of nonlinear synchronous switching damping (SSD) is established in this paper. On this basis, the working principle of SSD technology (including the improved SSDI,SSDS,SSDV, SSDS) is analyzed, and the expressions of the electromechanical conversion energy values of each control method within a period are derived. For the key technology of this technology-switch design, this paper adopts a passive peak detection switch circuit to realize its function, and deduces in detail that it can realize different closing time when it is combined with SSDI,SSDS technology. At the same time, the optimal external voltage of the SSDV technology in the semi-active control system is determined by experiment. Secondly, the circuit of the semi-active control system is improved to output or store the charge generated by the piezoelectric element in the process of vibration. Its working principle is analyzed theoretically, and its output voltage and output power are deduced in detail. Finally, the energy collection technology is combined with SSDV semi-active control. According to the experimental results, a suitable voltage regulator circuit is designed to provide a stable 2.5v DC voltage for the SSDV semi-active control system through a certain switching control strategy. Thus the self-supply of energy can be realized. The structure of the semi-active control system is simple and easy to implement. At the same time, the passive switching control circuit adopted in this paper has very low power consumption, which can realize the energy self-supply of the semi-active control system. Through the experimental comparison, it is found that the anti-vibration effect of SSDS, improved SSDS,SSDI and SSDV is gradually enhanced, which is in agreement with the theoretical results. Among them, SSDV has achieved better control effect under the action of 2.5 v vibration energy collection voltage.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB53
【参考文献】
相关硕士学位论文 前1条
1 季宏丽;智能结构的自感知主动振动控制以及半主动振动控制的研究[D];南京航空航天大学;2007年
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