本文選題：復(fù)合行星齒輪傳動(dòng)系統(tǒng)　切入點(diǎn)：時(shí)變嚙合剛度　出處：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著航空航天技術(shù)的發(fā)展,要求提高空間機(jī)械臂的平穩(wěn)性、安全性,這就對(duì)空間機(jī)械臂關(guān)節(jié)系統(tǒng)提出了更高要求。行星齒輪傳動(dòng)系統(tǒng),作為現(xiàn)代廣泛使用的傳動(dòng)系統(tǒng)之一,以其承載能力大、可靠性高、結(jié)構(gòu)緊湊、傳動(dòng)比大、壽命長(zhǎng)等顯著優(yōu)點(diǎn),應(yīng)用于多種長(zhǎng)壽命周期的大型空間機(jī)械臂關(guān)節(jié)設(shè)備中。因此,本文以復(fù)合行星齒輪傳動(dòng)系統(tǒng)作為研究對(duì)象,研究其動(dòng)力學(xué)特性,為設(shè)計(jì)具有優(yōu)良動(dòng)力學(xué)性能的機(jī)械臂關(guān)節(jié)提供指導(dǎo)。進(jìn)行傳動(dòng)系統(tǒng)動(dòng)力學(xué)分析,需要考慮嚙合剛度、阻尼等非線性因素,建立系統(tǒng)動(dòng)力學(xué)模型。本文對(duì)齒輪時(shí)變嚙合剛度進(jìn)行研究,基于齒條刀具范成法加工齒輪原理,推導(dǎo)精確齒廓曲線。采用APDL語(yǔ)言,建立具有精確齒廓的齒輪嚙合模型,對(duì)模型進(jìn)行接觸區(qū)網(wǎng)格細(xì)化,通過(guò)計(jì)算不同相位的齒輪嚙合剛度,得到一個(gè)嚙合周期的齒輪時(shí)變嚙合剛度。分析不同扭矩條件下的時(shí)變嚙合剛度變化,為行星齒輪動(dòng)力學(xué)研究提供精確的參數(shù)。綜合考慮構(gòu)件支撐剛度、嚙合剛度、阻尼、嚙合綜合誤差等因素,利用集中參數(shù)法分別建立復(fù)合行星齒輪傳動(dòng)系統(tǒng)中不同傳動(dòng)形式的平移—扭轉(zhuǎn)耦合動(dòng)力學(xué)模型�；谀K化思想,建立通用的四級(jí)模塊,通過(guò)集成各級(jí)模塊生成復(fù)合行星齒輪傳動(dòng)系統(tǒng)的非線性動(dòng)力學(xué)微分方程組�；谀K化思想,對(duì)復(fù)合行星齒輪傳動(dòng)系統(tǒng)固有特性進(jìn)行研究。將傳動(dòng)系統(tǒng)質(zhì)量矩陣和剛度矩陣按照傳動(dòng)形式分為三個(gè)模塊。編寫(xiě)具有通用性的固有特性計(jì)算程序,并以空間機(jī)械臂關(guān)節(jié)用復(fù)合行星傳動(dòng)系統(tǒng)為例,計(jì)算其固有頻率和振動(dòng)矢量,并分析固有頻率的參數(shù)敏感度。分析復(fù)合行星齒輪傳動(dòng)系統(tǒng)的動(dòng)力學(xué)特性,使用數(shù)值積分法求解傳動(dòng)系統(tǒng)的動(dòng)態(tài)響應(yīng),基于MATLAB的GUI模塊設(shè)計(jì)應(yīng)用于機(jī)械臂用復(fù)合行星齒輪傳動(dòng)系統(tǒng)的模塊化動(dòng)力學(xué)仿真平臺(tái)。該傳動(dòng)系統(tǒng)模塊化動(dòng)力學(xué)仿真平臺(tái)集動(dòng)力學(xué)模型建立和動(dòng)力學(xué)特性計(jì)算于一體,并以復(fù)合行星齒輪傳動(dòng)系統(tǒng)為例驗(yàn)證仿真平臺(tái)的適用性。
[Abstract]:With the development of aerospace technology, it is required to improve the stability and safety of space manipulator, which puts forward higher requirements for the joint system of space manipulator. Planetary gear transmission system is one of the widely used transmission systems in modern times. Because of its advantages of large bearing capacity, high reliability, compact structure, large transmission ratio and long life, it is used in many kinds of large space mechanical arm joint equipments with long life cycle. In this paper, the dynamic characteristics of composite planetary gear transmission system are studied to provide guidance for the design of mechanical arm joints with excellent dynamic performance. In order to carry out dynamic analysis of transmission system, meshing stiffness should be considered. In this paper, the time-varying meshing stiffness of gear is studied, and the accurate tooth profile curve is deduced based on the principle of gear machining with rack cutting tool. A gear meshing model with accurate tooth profile is established. The contact area mesh of the model is refined, and the meshing stiffness of gears with different phases is calculated. The time-varying meshing stiffness of gears with a meshing period is obtained. The variation of time-varying meshing stiffness under different torque conditions is analyzed to provide precise parameters for the study of planetary gear dynamics. By using the lumped parameter method, the translation torsion coupling dynamic models of different transmission forms in the composite planetary gear transmission system are established by using the meshing synthetic error and other factors. Based on the idea of modularization, a general four-level module is established. The nonlinear dynamic differential equations of composite planetary gear transmission system are generated by integrating all levels of modules. The inherent characteristics of composite planetary gear transmission system are studied. The mass matrix and stiffness matrix of transmission system are divided into three modules according to the transmission form. Taking the composite planetary transmission system for space manipulator as an example, the natural frequency and vibration vector are calculated, and the parameter sensitivity of the natural frequency is analyzed, and the dynamic characteristics of the composite planetary gear transmission system are analyzed. The numerical integration method is used to solve the dynamic response of the transmission system. The design of the GUI module based on MATLAB is applied to the modular dynamic simulation platform of the composite planetary gear transmission system for the manipulator. The modular dynamic simulation platform of the transmission system integrates the establishment of the dynamic model and the calculation of the dynamic characteristics. The applicability of the simulation platform is verified by taking the composite planetary gear transmission system as an example.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH132.425

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