單片機(jī)步進(jìn)電機(jī)控制系統(tǒng)外文文獻(xiàn)翻譯--簡(jiǎn)單緊湊的大步長(zhǎng)線性壓電步進(jìn)電機(jī)-資料下載頁(yè)
2024-11-02 09:12本頁(yè)面
【導(dǎo)讀】文章標(biāo)題用3號(hào)宋體，章節(jié)標(biāo)題用4號(hào)宋體，正文。按中文翻譯在上，外文原文在下的順序裝訂。規(guī)定》，如“2020年2月26日”。意方向可操作性的特點(diǎn)。雖然測(cè)試在室溫下進(jìn)行，但是由于寬松的操作條件和大步。電機(jī)由一個(gè)壓電掃描器管來(lái)運(yùn)行，它的軸向幾乎被切。雙驅(qū)動(dòng)電壓僅使壓力管的兩部。粗略接近被測(cè)物的末端或者樣品的定位器，這多半需要一個(gè)壓電步進(jìn)電機(jī)。們的可靠性和應(yīng)用程度成為了一個(gè)很大的問題。移動(dòng)軸承以恢復(fù)原狀，反之亦然。制的壓電掃描管的兩部分分別簡(jiǎn)稱為P1，P2。同時(shí)也應(yīng)注意到，這種夾持結(jié)構(gòu)是靈。持不變，P2收縮。這會(huì)導(dǎo)致P2和空心管的自由端的電壓下降，而不是基環(huán)和空心環(huán)指。這次僅在基礎(chǔ)環(huán)和空心環(huán)之間的電壓發(fā)生了下滑，因?yàn)椤Ｗ詈?，P1和P2回到最初狀態(tài)，空心環(huán)移動(dòng)了一步。這種設(shè)計(jì)比圓形的設(shè)計(jì)相對(duì)以下方面要好：空心管在藍(lán)環(huán)
【正文】 cy [Figs. 5(a)and 6(a)for circular and square HS, respectively]and operating voltage[(b)and 6(b)for circular and square HS, respectively]. The pressing forces were set to N1≈N2≈Nbr≈ for circular HS which are much smaller than the blocking forces (Fbl1～ Fbl2～ 2N)of the driving piezoP1 and P2. The maximum step size is m with the measurement conditions being: circular HS, downward stepping with Hz driving frequency. When the moving direction is changed to upward, the step size bees m due to gravity. In case of square HS, the downward and upward step sizes are and , respectively, which is more uniform because of its knife edge contacts with the sapphire rings. All these step sizes are rather large pared with other types of piezoelectric motors9,11,23 with the similar speed of motion is of course closely related to the driving frequency. The maximum driving frequency we set was 50 Hz, at which the speeds for the circular(upward versus downward) and square(upward versus downward)HS were:( versus )and( versus )mm/min. When the driving frequency increases or if the magnitude of the operating voltage drops, the step size diminishes as seen in Figs. 5 and 6. Although we get larger step size from circular HS, we still prefer the square HS owing to its advantages listed earlier. For instance, the travel range using the square HS is 9 mm(as designed)pared with mm for the circular HS(worse than the designed travel range).The performance curves of the square HS motor seen in are also smoother and more consistent than those ()of the circular HS motor. step size(left vertical axis)nd speed(right vertical axis of the motor using the circular HS as functions of (a) frequency(maximum operating voltage=177。200 V) and (b) maximum operating voltage (frequency=20 Hz). Although tested in room temperature, the motor has high potential to work in liquid helium temperature for two reasons:(1)its large step size can afford to pay for the thermal contraction still with remarkable step size remaining to produce a move。(2)its spring clamping structure validates the required friction relationship,|fr1|≈|fr2|≈|frbr|,in a very wide temperature range since a change from room temperature to liquid helium only shrinks the pression springs (～ 5 mm long, spring constant is about 286 N/m)by microns which do not considerably affect the pressing forces between the HS and the sapphire rings. The square HS may suffer wear and tear issues as its four edges could be scratched by the sapphire rings. To test its durability, we operated the motor repeatedly with 177。200 V and 50 Hz driving voltages for more than one thousand times with a displacement about 3 mm and the motor still worked well. The wear was not severe. Of course, the HS can be coated with wear resistant materials for better protection if necessary. step size(left vertical axis)nd speed(right vertical axis of the motor using the circular HS as functions of (a) frequency(maximum operating voltage=177。200 V) and (b) maximum operating voltage(frequency=20Hz). IV. CONCLUSION We have presented a powerful linear piezoelectric motor that owns several important features not simultaneously owned by other piezomotors,including: large step size,small size,very rigid,simple in structure and operation, very large temperature range, easy to make and loose machining tolerance,etc. Its durability has also been tested,which is rather these are highly desired in the construction of a modern SPM. 指導(dǎo)教師意見： 指導(dǎo)教師簽字： 年 月 日 系 (教研室 )意見： 主任簽字： 年 月 日
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