實驗名稱：ATA-4051高壓功率放大器(qi)在非(fei)共振(zhen)式壓電直線電機(ji)性(xing)能測試中的應用

　　研究方向：壓電驅動

　　實驗內容：基于壓(ya)電(dian)疊(die)堆驅(qu)(qu)動(dong)的(de)非共振(zhen)式(shi)壓(ya)電(dian)直線(xian)電(dian)機(ji)的(de)性能(neng)測試，壓(ya)電(dian)直線(xian)電(dian)機(ji)結構使用二級放(fang)(fang)大機(ji)構，對壓(ya)電(dian)疊(die)堆的(de)輸(shu)出位移進(jin)(jin)行放(fang)(fang)大，同(tong)時該(gai)結構采(cai)用交替(ti)驅(qu)(qu)動(dong)的(de)方(fang)式(shi)以(yi)提高驅(qu)(qu)動(dong)器定子(zi)的(de)驅(qu)(qu)動(dong)效(xiao)率(lv)。使用方(fang)波信號作為激勵(li)(li)信號，定子(zi)驅(qu)(qu)動(dong)足通過摩擦(ca)力驅(qu)(qu)動(dong)導軌運(yun)動(dong)，對該(gai)電(dian)機(ji)的(de)輸(shu)出性能(neng)進(jin)(jin)行測試，同(tong)時得到激勵(li)(li)電(dian)機(ji)信號的(de)最佳頻率(lv)。

　　測試設備：信號發(fa)生器(qi)(qi)，ATA-4051高壓(ya)功(gong)率放大器(qi)(qi)，磁柵(zha)尺(chi)位移傳感器(qi)(qi)，壓(ya)電疊堆等。

圖：實驗平臺

　　實驗過程：

圖：電機結構圖

　　電機(ji)定子使(shi)(shi)用(yong)螺栓固(gu)定在底座上，通(tong)過千分尺對(dui)導軌(gui)施加預緊力。非共振(zhen)式壓(ya)電直線電機(ji)需要兩相信號(hao)驅動(dong)電機(ji)定子工作，利用(yong)信號(hao)發(fa)(fa)生器(qi)(qi)，ATA-4051高壓(ya)功率(lv)放大(da)(da)器(qi)(qi)，磁(ci)柵(zha)(zha)尺位移(yi)傳(chuan)感(gan)器(qi)(qi)搭建實驗平(ping)臺，用(yong)來(lai)測試電機(ji)的輸出性能(neng)。使(shi)(shi)用(yong)信號(hao)發(fa)(fa)生器(qi)(qi)生成方波信號(hao)，通(tong)過功率(lv)放大(da)(da)器(qi)(qi)放大(da)(da)后(hou)驅動(dong)定子工作。使(shi)(shi)用(yong)磁(ci)柵(zha)(zha)尺傳(chuan)感(gan)器(qi)(qi)測量導軌(gui)的運動(dong)位移(yi)，采用(yong)半物理(li)仿真系統對(dui)數據進行采集。

　　測試結果：

　　對壓(ya)(ya)電(dian)(dian)(dian)(dian)疊(die)堆(dui)施加(jia)(jia)135V電(dian)(dian)(dian)(dian)壓(ya)(ya)，通過改變(bian)頻率以(yi)得到(dao)不(bu)同(tong)頻率下(xia)的(de)(de)(de)電(dian)(dian)(dian)(dian)機(ji)(ji)輸(shu)(shu)出性(xing)(xing)能，實驗(yan)結(jie)果表明，電(dian)(dian)(dian)(dian)機(ji)(ji)在(zai)施加(jia)(jia)70Hz頻率下(xia)，輸(shu)(shu)出性(xing)(xing)能達到(dao)最高，在(zai)70Hz頻率之(zhi)后，電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)(de)輸(shu)(shu)出性(xing)(xing)能開始逐(zhu)漸降低，這是(shi)由于壓(ya)(ya)電(dian)(dian)(dian)(dian)疊(die)堆(dui)的(de)(de)(de)遲滯現象以(yi)及定(ding)子自身(shen)產生的(de)(de)(de)阻尼造成的(de)(de)(de)。實驗(yan)結(jie)果表明電(dian)(dian)(dian)(dian)機(ji)(ji)在(zai)70Hz頻率下(xia)性(xing)(xing)能達到(dao)最優。其次，通過對電(dian)(dian)(dian)(dian)機(ji)(ji)施加(jia)(jia)70Hz頻率，通過改變(bian)電(dian)(dian)(dian)(dian)壓(ya)(ya)大小，得到(dao)不(bu)同(tong)電(dian)(dian)(dian)(dian)壓(ya)(ya)下(xia)，電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)(de)輸(shu)(shu)出性(xing)(xing)能，實驗(yan)結(jie)果表明，電(dian)(dian)(dian)(dian)機(ji)(ji)在(zai)60V電(dian)(dian)(dian)(dian)壓(ya)(ya)之(zhi)后具有良好的(de)(de)(de)線性(xing)(xing)度，在(zai)135V電(dian)(dian)(dian)(dian)壓(ya)(ya)下(xia)，電(dian)(dian)(dian)(dian)機(ji)(ji)速(su)度達到(dao)最大，為5.53mm/s，先(xian)比較于其他非共振式壓(ya)(ya)電(dian)(dian)(dian)(dian)直線電(dian)(dian)(dian)(dian)機(ji)(ji)，具有更大的(de)(de)(de)輸(shu)(shu)出速(su)度。

　　放(fang)大器(qi)在該(gai)實驗(yan)中(zhong)發(fa)揮的效能：實現激(ji)勵信號0-30倍的功率放(fang)大，驅動壓電(dian)疊(die)堆產(chan)生(sheng)形變。

圖：ATA-4051高壓功率放大器指(zhi)標參數 

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