發(fā)布時間：2018-01-17 13:05

  本文關(guān)鍵詞：雙振子駐波直線超聲電機(jī)的設(shè)計(jì)與建模　出處：《南京航空航天大學(xué)》2014年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 直線超聲電機(jī) 結(jié)構(gòu)設(shè)計(jì) 結(jié)構(gòu)優(yōu)化 整機(jī)模型 接觸模型 動力學(xué)模型 熱力學(xué)模型

【摘要】：駐波直線超聲電機(jī)是最具代表性的直線超聲電機(jī),它在航天、醫(yī)療、精密儀器儀表、機(jī)器人等領(lǐng)域中顯示了廣闊的應(yīng)用前景,得到了越來越廣泛的關(guān)注。目前的駐波直線電機(jī)雖然外形多種多樣,但其最基本的工作原理仍較單一,且在電機(jī)的整機(jī)建模上一直進(jìn)展緩慢,不利于其研究的進(jìn)一步發(fā)展。本文提出了一種新原理的駐波直線超聲電機(jī)的設(shè)計(jì)方案,設(shè)計(jì)加工了樣機(jī),并建立了該電機(jī)的整機(jī)動力學(xué)模型和整機(jī)熱力學(xué)模型。本文主要的研究內(nèi)容和成果綜述如下:1.簡要地介紹了直線超聲電機(jī)的發(fā)展歷史,并重點(diǎn)介紹了駐波直線超聲電機(jī)結(jié)構(gòu)設(shè)計(jì)和理論建模的研究現(xiàn)狀。針對駐波直線超聲電機(jī)研究的不足之處,明確了本課題的研究目標(biāo)。2.提出了雙振子駐波直線超聲電機(jī)的設(shè)計(jì)方法。該方法的主要創(chuàng)新在于:將傳統(tǒng)駐波直線超聲電機(jī)定子的復(fù)雜耦合模態(tài)振動解耦成兩個簡單的獨(dú)立模態(tài)振動,并分別交由一個單模態(tài)振子來實(shí)現(xiàn)。由于兩振子是獨(dú)立設(shè)計(jì)的,因此可對它們的結(jié)構(gòu)分別進(jìn)行調(diào)整,使電機(jī)兩項(xiàng)模態(tài)頻率一致。因此,該設(shè)計(jì)方法可簡化直線超聲電機(jī)的設(shè)計(jì)。根據(jù)該方法,設(shè)計(jì)加工了一個基于桿結(jié)構(gòu)的雙振子型駐波直線超聲電機(jī)。在100Vp的電壓激勵下,樣機(jī)最大推力、速度、功率分別達(dá)到了47N,0.43m/s和7.85W。3.探討了兩振子的固有頻率差對電機(jī)輸出性能的影響規(guī)律。在此基礎(chǔ)上,通過優(yōu)化電機(jī)結(jié)構(gòu),控制該電機(jī)兩振子在自由邊界條件下的固有頻率,電機(jī)的輸出性能得到了改善。實(shí)驗(yàn)結(jié)果表明:對該樣機(jī)而言,當(dāng)自由邊界條件下定子的二階縱振固有頻率高于動子一階縱振固有頻率73 Hz時,樣機(jī)最大推力、速度和功率分別達(dá)到了64.2 N,0.76 m/s和17.4 W;最大推重比達(dá)到23.7,最大效率達(dá)到39.6%。4.建立了該雙振子駐波直線超聲電機(jī)的動力學(xué)模型。該動力學(xué)模型主要包括:定子與動子的接觸模型、定子的振動模型、動子的振動模型和定子與動子間摩擦傳動模型。利用該動力學(xué)模型可以得到定子和動子的模態(tài)特性、振動響應(yīng)、以及電機(jī)直線運(yùn)動的位移、速度與時間的關(guān)系等。在建模過程中,考慮了定子與動子接觸的非線性因素。5.基于動力學(xué)模型,利用MATLAB編程,進(jìn)行了振子模態(tài)特性、電機(jī)輸出特性和電機(jī)瞬態(tài)特性的仿真,實(shí)驗(yàn)結(jié)果與仿真結(jié)果一致。在仿真的基礎(chǔ)上,(1)提出一種電機(jī)結(jié)構(gòu)設(shè)計(jì)算法,編寫了程序并設(shè)計(jì)了人機(jī)交互界面,該程序快速準(zhǔn)確,方便該型電機(jī)的結(jié)構(gòu)設(shè)計(jì);(2)提出一種提高電機(jī)輸出性能和效率的方法,該方法通過實(shí)驗(yàn)得到了驗(yàn)證。6.分析總結(jié)了該電機(jī)運(yùn)行中溫度上升的原因,詳細(xì)計(jì)算了導(dǎo)致電機(jī)溫度上升的損耗。在計(jì)算的結(jié)果上,利用ANSYS對該電機(jī)進(jìn)行了熱力學(xué)仿真,得到了電機(jī)熱穩(wěn)態(tài)下的溫度場分布,以及電機(jī)上任一點(diǎn)的溫度—時間變化關(guān)系。該研究為進(jìn)一步探討超聲電機(jī)熱源優(yōu)化問題提供了分析方法。
[Abstract]:Standing wave linear ultrasonic motor is the most representative linear ultrasonic motor, it has shown a broad application prospect in aerospace, medical treatment, precision instrument, robot and other fields. The standing wave linear motor has been paid more and more attention. Although it has a variety of shapes, its basic working principle is still relatively simple, and the progress in the whole machine modeling of the motor has been slow. In this paper, a new design scheme of standing wave linear ultrasonic motor is proposed, and the prototype is designed and processed. The dynamic model and thermodynamic model of the motor are established. The main research contents and results are summarized as follows: 1. The development history of linear ultrasonic motor is briefly introduced. The research status of the structure design and theoretical modeling of standing wave linear ultrasonic motor is introduced, and the deficiency of standing wave linear ultrasonic motor research is pointed out. 2. The design method of double vibrator standing wave linear ultrasonic motor is put forward. The main innovation of this method lies in:. The complex coupling mode vibration of the stator of traditional standing wave linear ultrasonic motor is decoupled into two simple independent modes. Because the two vibrators are designed independently, their structures can be adjusted separately to make the two modes frequency of the motor consistent. This design method can simplify the design of linear ultrasonic motor. According to this method, a double-vibrator standing wave linear ultrasonic motor based on rod structure is designed and manufactured. Under the voltage excitation of 100Vp, the maximum thrust of the prototype is obtained. The speed and power reach 47NV 0.43m / s and 7.85W.3.The influence of the natural frequency difference of the two oscillators on the output performance of the motor is discussed. On this basis, the structure of the motor is optimized. The output performance of the motor is improved by controlling the natural frequency of the two vibrators under the free boundary condition. The experimental results show that: for the prototype. When the natural frequency of the second order longitudinal vibration of the stator is higher than 73 Hz of the first order longitudinal vibration of the stator under the free boundary condition, the maximum thrust, velocity and power of the prototype are 64.2 N. 0.76 m / s and 17.4 W; The maximum push-weight ratio is 23.7 and the maximum efficiency is 39.6.4.The dynamic model of the double-vibrator standing wave linear ultrasonic motor is established. The dynamic model mainly includes the contact model between stator and mover. The vibration model of the stator, the vibration model of the rotor and the friction transmission model between the stator and the actuator can be used to obtain the modal characteristics, vibration response of the stator and the actuator, as well as the displacement of the motor's linear motion. The relationship between velocity and time, etc. In the process of modeling, the nonlinear factors of stator and mover contact are considered. 5. Based on the dynamic model, the modal characteristics of oscillator are carried out by using MATLAB programming. The simulation results of the output characteristics and transient characteristics of the motor are consistent with the simulation results. On the basis of the simulation, a motor structure design algorithm is proposed, a program is written and the man-machine interface is designed. The program is fast and accurate, and it is convenient for the structure design of the motor. A method to improve the output performance and efficiency of the motor is proposed. The method is verified by experiments. 6. The reasons for the temperature rise in the motor operation are analyzed and summarized. The loss caused by the temperature rise of the motor is calculated in detail. Based on the calculation results, the thermodynamics simulation of the motor is carried out by using ANSYS, and the temperature field distribution under the thermal steady state of the motor is obtained. And the relationship between temperature and time at any point on the motor. This study provides an analytical method for the optimization of ultrasonic motor heat source.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM359.4

【引證文獻(xiàn)】

相關(guān)會議論文 前1條

1 趙文濤;姚志遠(yuǎn);王曉楠;葛兆鳳;;直線超聲波電動機(jī)摩擦磨損裝置和環(huán)境實(shí)驗(yàn)研究[A];第十六屆中國小電機(jī)技術(shù)研討會論文摘要集[C];2011年

，

本文編號：1436351