基于FxLMS算法的齒輪傳動系統(tǒng)振動噪聲主動控制研究
本文關(guān)鍵詞: 齒輪傳動 振動噪聲 主動控制 FxLMS 硬件在環(huán) 出處:《重慶大學(xué)》2012年碩士論文 論文類型:學(xué)位論文
【摘要】:齒輪作為一種通用件,是各種機(jī)械裝備系統(tǒng)中的重要傳動裝置,在機(jī)械、交通、化工、航空、航天、船舶等行業(yè)的設(shè)備中起著非常關(guān)鍵的作用。實(shí)際應(yīng)用中的齒輪不可避免地存在著制造、安裝誤差,在載荷的作用下輪齒將發(fā)生變形。這些誤差和變形破壞了齒輪傳動的嚙合關(guān)系,使齒輪嚙合時的位置相對于其理論位置發(fā)生偏離,從而使瞬時傳動比發(fā)生變化,造成齒與齒之間的碰撞和沖擊,形成了齒輪嚙合的誤差激勵,從而產(chǎn)生振動和噪聲。 本文結(jié)合壓電智能材料的應(yīng)用,將主動控制技術(shù)用于齒輪嚙合傳動系統(tǒng)振動控制,基于軸橫向振動主動控制思想,提出了一種齒輪箱內(nèi)主動控制結(jié)構(gòu),使主動控制力以更直接的方式控制誤差激勵引起的振動響應(yīng)。利用多組壓電片在力學(xué)上串聯(lián)、電學(xué)上并聯(lián)的設(shè)計思想,構(gòu)成壓電堆作動器,基于FxLMS自適應(yīng)算法,通過作動器輸出的位移控制齒輪軸的彎曲振動,進(jìn)而達(dá)到衰減振動和噪聲的目的。具體工作包括以下幾個方面: ①根據(jù)振動主動控制思想,確定了齒輪傳動系統(tǒng)主動控制系統(tǒng)結(jié)構(gòu);贔xLMS算法,引入確定性正弦周期信號作為激勵源,對齒輪傳動周期性振動進(jìn)行了主動控制仿真,分析了FxLMS算法的收斂條件以及次級通道對性能的影響。 ②首先建立了齒輪傳動系統(tǒng)的虛擬樣機(jī),分析了系統(tǒng)的動態(tài)響應(yīng)特性。然后導(dǎo)出虛擬樣機(jī)模型,建立控制程序框圖,進(jìn)行了振動主動控制聯(lián)合仿真研究,進(jìn)一步驗(yàn)證了FxLMS算法在齒輪傳動振動主動控制方面的有效性和可行性。 ③設(shè)計加工并搭建了齒輪傳動振動主動控制實(shí)驗(yàn)平臺,完成了實(shí)驗(yàn)系統(tǒng)軟硬件集成,通過實(shí)驗(yàn)分析了齒輪傳動系統(tǒng)的動態(tài)響應(yīng)特性和壓電堆作動器的作動特性,為進(jìn)一步進(jìn)行齒輪傳動振動主動控制方法的實(shí)驗(yàn)驗(yàn)證提供了基礎(chǔ)。 ④設(shè)計了Fuzzy、Fuzzy-PD和FxLMS三種不同的控制器,,進(jìn)行了硬件在環(huán)仿真實(shí)驗(yàn)研究。研究表明,F(xiàn)uzzy控制、Fuzzy-PD控制和FxLMS控制在齒輪傳動系統(tǒng)主動振動控制方面有較好效果。在低轉(zhuǎn)速工況,F(xiàn)xLMS控制策略的控制效果最為明顯。
[Abstract]:Gear, as a universal part, is an important transmission device in various mechanical equipment systems, in machinery, transportation, chemical industry, aviation, aerospace. The equipment of ship and other industries plays a very important role. The gears in practical application inevitably have manufacturing and installation errors. Under the action of load, the gear teeth will deform. These errors and deformations destroy the meshing relation of gear transmission, make the position of gear meshing deviate from its theoretical position, and make the instantaneous transmission ratio change. It causes the collision and impact between the teeth and forms the error excitation of gear meshing, resulting in vibration and noise. Combined with the application of piezoelectric intelligent material, the active control technology is applied to the vibration control of gear meshing transmission system. Based on the idea of active control of axial transverse vibration, a kind of active control structure in gear box is proposed. The vibration response caused by the error excitation is controlled by the active control force in a more direct manner. The piezoelectric stack actuator is constructed by using the design idea of the series piezoelectric plates in mechanics and the electrical parallel connection. Based on the FxLMS adaptive algorithm, the bending vibration of the gear shaft is controlled by the displacement output of the actuator, which can attenuate the vibration and noise. The specific work includes the following aspects: 1 according to the idea of active vibration control, the structure of the active control system of gear transmission system is determined. Based on FxLMS algorithm, deterministic sinusoidal periodic signal is introduced as the excitation source. The active control simulation of the periodic vibration of gear transmission is carried out. The convergence conditions of FxLMS algorithm and the influence of secondary channels on the performance are analyzed. Firstly, the virtual prototype of gear transmission system is established, and the dynamic response characteristic of the system is analyzed. Then, the virtual prototype model is derived, the control program block diagram is established, and the joint simulation of active vibration control is carried out. The validity and feasibility of FxLMS algorithm in the active control of gear drive vibration are further verified. (3) designed and manufactured the experimental platform for active control of gear drive vibration, and completed the integration of hardware and software of the experimental system. The dynamic response characteristics of the gear transmission system and the actuation characteristics of the piezoelectric pile actuator are analyzed experimentally, which provides a basis for the experimental verification of the active vibration control method of the gear transmission. 4. Three different kinds of fuzzy controller, Fuzzy-PD and FxLMS, are designed, and the simulation results of hardware in loop are carried out. Fuzzy-PD control and FxLMS control have good effect on the active vibration control of gear transmission system, and the control effect of FxLMS control strategy is the most obvious in low speed condition.
【學(xué)位授予單位】:重慶大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2012
【分類號】:TH132.41;TB535
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