lock n. 1.鎖,閂,栓。 2.(運(yùn)河等的)船閘。 3.制輪楔。 4.【機(jī)械工程】氣閘,氣塞,鎖氣室。 5.【軍事】槍機(jī)。 6.鎖住,固定。 7.〔俚語〕拘留所。 8.〔英國〕性病醫(yī)院 (=lock hospital). 9.【自動(dòng)化】同步。 10.結(jié)合,固著。 11.(摔跤的)揪扭。 12.煞車。 off the lock未鎖。 on the lock鎖著。 trick lock(對(duì)字的)密碼鎖。 lock the stable door after the horse has been stolen 賊走關(guān)門。 be at [on, upon] the lock 〔方言〕在窘困中。 lock, stock and barrel 全部;完全。 under lock and key 鎖著,妥為保藏。 vt. 1. 鎖,鎖上。 2.收藏起來,秘藏。 3.抱緊,挽??;揪扭。 4.(使資本等)固定。 5.使固定。 6.用水閘止??;使通過水閘 (up down). 7.卡住,塞住。 8.將曲面印版裝在輪轉(zhuǎn)印刷機(jī)滾筒上。 lock a secret in one's heart 嚴(yán)守秘密。 be locked in a fight 打得難分難解。 be locked in contemplation 陷入沉思。 The ship was locked fast in ice. 這條船被冰封住。 The gears are locked. 齒輪卡住了。 vi. 1.鎖住。 2.緊閉,不動(dòng)。 3.抱住,揪扭,嵌進(jìn)。 4.(船)通過水閘;造水閘。 lock away 鎖起來。 lock down 讓船開出水閘。 lock horns 爭(zhēng)論 (over)。 lock in 關(guān)起來;鎖在里面。 lock in synchronism 進(jìn)入同步。 lock on 用雷達(dá)波束自動(dòng)跟蹤(目標(biāo))。 lock oneself in 把自己關(guān)在里面,閉門謝客。 lock out 1. 關(guān)在外面。 2. (資本家)封閉工廠。 lock up 1. 上鎖,鎖住。 2. 監(jiān)禁。 3. 收藏(文件等)。 4. 固定(資本)。 adj. -less 無鎖的;無船閘的。 lock2 n. 1.一綹卷發(fā)。 〔pl.〕頭發(fā)。 2.(干草、羊毛等的)小量,一把,一撮。
A phase - locked - loop - based model reference adaptive system for speed estimation of sensorless induction motor drives 一種基于鎖相環(huán)原理的參考模型自適應(yīng)感應(yīng)電機(jī)轉(zhuǎn)速估計(jì)方法
It introduces the method of modulated light subtracting infrared radiation of atmosphere and background as well as the method of phase - lock - loop detecting feebleness signal 采用光路差分調(diào)制的方法實(shí)時(shí)扣除背景紅外輻射,并采用鎖定放大器進(jìn)行微弱信號(hào)的檢測(cè)。
The design of the scheme is mainly in consideration of good adaptability for variable transmission systems . chapter 3 introduces the digital phase - locked - loop used in the modulator scheme 方案設(shè)計(jì)的重點(diǎn)在于方案的靈活性,使之能夠?qū)Σ煌膫鬏旙w制具有盡量好的適應(yīng)性和可移植性。
Secondly , the power regulation circuit is discussed in detail , and the high frequency phase - shift power regulation circuit is studied detailedly . lastly , the frequency - tracing circuit is designed with phase - locked - loop 其次,對(duì)高頻串聯(lián)逆變電源的功率調(diào)節(jié)問題進(jìn)行了詳細(xì)地討論,并仔細(xì)地研究了高頻情況下移相調(diào)功的問題。
Since commercial pll ic came out , phase - locked - loop frequency synthesis has become widely accepted . but when narrow frequency - step is required , the loop bandwidth has to decrease while cannot meet the demand of frequency - hopping speed 數(shù)字鎖相集成器件出現(xiàn)以來,鎖相式頻率合成器得到迅速發(fā)展,但是當(dāng)需要窄頻率步進(jìn)時(shí),環(huán)路帶寬需要降低,致使鎖定時(shí)間變長(zhǎng),不能滿足快速跳頻的要求。
Then a composite control approach was brought forward which combined wave neural networks ( wnn ) with digital phase locked - loop ( dpll ) to improve performances of induction heating . simulation results show that the means is effective and feasible . the main works done by author are as follows : 1 針對(duì)感應(yīng)加熱電源的控制問題,在保留鎖相環(huán)控制的基礎(chǔ)上,將小波網(wǎng)絡(luò)控制和數(shù)字式鎖相環(huán)控制相結(jié)合,實(shí)現(xiàn)了對(duì)感應(yīng)加熱電源的復(fù)合控制,仿真結(jié)果表明了該方法的有效性和可行性。
Finally , the principle of phase - locked - loop for speed control is discussed . the control methods of torque and magnetic levitation force are studied experimentally on a prototype bearingless motor . based on the analysis of shortcomings of the analog control system , a digital control system is proposed 分析了采用鎖相環(huán)對(duì)電機(jī)轉(zhuǎn)速進(jìn)行閉環(huán)控制的原理;設(shè)計(jì)了磁懸浮力的模擬控制器并對(duì)磁懸浮血泵電機(jī)進(jìn)行了實(shí)驗(yàn)研究;針對(duì)模擬控制系統(tǒng)存在的缺點(diǎn),本文設(shè)計(jì)了一種數(shù)字控制系統(tǒng)。
At first , the fundamental theories and realization methods of main parts of high purity frequency source in x band object simulator of vehicle - carried phased - array radar , such as phase - locked - loop , step recovery frequency multiplier , dielectric band - pass filter and micro strip band - pass filter are introduced in detail in this paper 本文一開始洲門針對(duì)機(jī)載相控陣?yán)走_(dá)目標(biāo)模擬器中的高純本振源的實(shí)現(xiàn),詳細(xì)地介紹了瑣相環(huán)、階躍管倍頻器、介質(zhì)帶通濾波器和微波帶通濾波器的基本原理及其實(shí)現(xiàn)方法。