Micro - electro - mechanical systems technology and components 微機(jī)電元件及系統(tǒng)
The buckling analysis of functionally gradient thin elastic plate bonded piezoelectric patches 壓電元件驅(qū)動(dòng)的功能梯度彈性薄板的屈曲
The dynamic model of the section - varying intelligent piezoelectric beams with surface - bonded piezoelectric element is developed and the natural frequencies are analyzed 建立變截面智能壓電梁的動(dòng)態(tài)模型,分析表面粘貼壓電元件的均質(zhì)梁的固有頻率。
To discretely distributed sensor / actuator units , on the premise of stable control , different localization of them would lead to different effect of vibration control 對(duì)于離散分布的壓電元件來(lái)講,在控制器穩(wěn)定的前提下,不同位置的傳感作動(dòng)單元將產(chǎn)生不同的控制效果。
It combines finite element method and the optimal design of piezoelectric elements together , and therefore can be applied to the vibration analysis and design of complex smart structures 改進(jìn)后的方法將結(jié)構(gòu)數(shù)值分析方法與壓電元件的優(yōu)化配置問(wèn)題相結(jié)合,更加具有可操作性。
It is shown that the effects of the stiffness and inertia of the piezoelectric element that lead to higher first natural frequency on the natural frequencies of the beam are significant , and that of the elastic modulus of the bonding layer is small 研究表明,壓電元件的剛度和慣量對(duì)梁的頻率影響很大,變截面智能壓電梁的一階固有頻率總是高于等截面梁的固有頻率。
This study adopts active detection technique based on lamb wave to monitor damage in composite materials . pzt ceramics with the diameter of 8mm are bonded on the surface of fiberglass - reinforced composite material acting as both actuators and sensors to generate and collect lamb waves . the waves emitted interact with discontinuities and experience a change in their propagation characteristics when damage is generated 本文采用lamb波主動(dòng)監(jiān)測(cè)技術(shù),利用粘貼在復(fù)合材料板表面的壓電元件,通過(guò)選擇恰當(dāng)?shù)募?lì)信號(hào),激勵(lì)出可進(jìn)行l(wèi)amb波分析的主動(dòng)監(jiān)測(cè)信號(hào),進(jìn)而對(duì)監(jiān)測(cè)信號(hào)進(jìn)行分析及模式處理,初步實(shí)現(xiàn)了二維結(jié)構(gòu)的損傷定位。
Then , it deals with the theory of the finite element , experimental modal analysis and hilbert huang transform , which forms the theoretical groundwork of the following experimental investigation aiming at analyzing the effect of the transducer debonging on the dynamic response of composite laminated cantilever beam 再次,采用壓電元件做傳感器的復(fù)合材料懸臂梁結(jié)構(gòu)為試驗(yàn)對(duì)象,利用模態(tài)分析、 hht變換的方法,對(duì)壓電元件與復(fù)合材料之間的脫膠損傷對(duì)結(jié)構(gòu)動(dòng)態(tài)特性的影響進(jìn)行試驗(yàn)研究。
Piezoelectric elements can be used as sensors and induced strain actuators in active vibration control systems . since the positioning of piezoelectric elements can affect control performance greatly , it has to be carefully determined , in this dissertation , detailed theoretical analysis and brief experimental study is made on the optimal positioning of piezoelectric elements for active vibration control applications 在智能結(jié)構(gòu)振動(dòng)主動(dòng)控制系統(tǒng)中,壓電元件可以分別作為傳感器和作動(dòng)器,其在結(jié)構(gòu)中的布置方式對(duì)振動(dòng)控制性能影響很大,是振動(dòng)主動(dòng)控制系統(tǒng)設(shè)計(jì)的重要問(wèn)題。