As a rigid rotor with special configuration , the crank - connecting rod mechanism is always integrated with its accessory components such as crank shaft 、 connecting rod and piston when it is under working conditions 曲轴作为结构特殊的刚性转子，在运行中总是与连杆、活塞(滑块)一起构成一个整体，称为曲柄连杆机构。
At present , some dynamic balancers are researched & developed and manufactured , and there are good effect , but there are still such many shortage as inefficiency , precision low , man - made interference greatness and debug difficulty 目前已形成产品的曲柄连杆机构动平衡机虽然取得了良好的效果，但仍存在许多不足：效率低、精度不高、人为因素干扰大，调试困难。
According to the research results above , a single cylinder oriented dynamic balance test system is developed . the research on system demarcation and system compensation methods are presented in details , and a related algorithm is proposed 在以上研究的基础上开发了一套针对单缸发动机曲柄连杆机构动平衡的测试系统，在系统标定、系统补偿等测试方法的关键问题上进行了详细的分析，并自行推导出了一套计算方法。
This dissertation has presented a new method on the measuring and checking procedures of the dynamic unbalance of the motorcycle crank and made a deep research on its measuring device . what have been done is as follows : firstly , the dissertation has thoroughly discussed the basic theory of rotor unbalance such as its varieties ， characters and rules of the movement which is under the excitation of the inertial force and inertial moment induced by the unbalance mass . it also has deeply expounded the dynamic mechanics of the specially formed components ? crank , especially in the area of the crank integrated with shaft and piston 本论文针对摩托车发动机曲柄连杆机构为研究对象，对曲柄连杆机构动平衡的测试提出了一种新方法，并对其数字化测试装置进行了深入研究，完成的主要工作及取得的成果如下：首先，对动平衡理论进行了详细的探讨，论述了不平衡产生的原因，不平衡种类及转子在不平衡量产生的惯性力激励下的运动规律，并对曲轴这一结构特殊的刚性转子的平衡理论进行了阐述，重点研究了曲柄连杆机构这一往复式机械构件的力学特性。
This dissertation has presented a new method on the measuring and checking procedures of the dynamic unbalance of the motorcycle single - cylinder engine crank - connecting rod mechanism and made a deep research on its measuring device . what have been done is as follows : firstly , the dissertation has thoroughly discussed the basic theory of rotor unbalance such as its varieties , damages , characters and rules of the movement which is under the excitation of the inertial force and inertial moment induced by the unbalance mass . it also has deeply expounded the dynamic mechanics of the specially formed components - crank shaft , especially in the area of the crank - connecting rod mechanism 本论文针对摩托车单缸发动机曲柄连杆机构为研究对象，对曲柄连杆机构动平衡的测试提出了一种新方法，并对其数字化测试装置进行了深入研究，完成的主要工作及取得的成果如下：首先，对动平衡理论进行了详细的探讨，论述了不平衡产生的原因、危害，不平衡的种类及转子在不平衡惯性力激励下的运动规律，并对曲轴这一结构特殊的刚性转子的平衡理论进行了阐述，重点研究了曲柄连杆机构这一往复式机械构件的力学特性。
Secondly , based on the defects of the uptodate balancing machine which were employed in the motorcycle manufacture plants , this dissertation has presented a new method on the means of checking unbalance mass of the motorcycle engine crank set . it has adopted the hard - bearing balancing machine as the prototype ， utilized tow group of resistance sensors placed in vertical direction with one another to pick up the information which stand for the inertial force of the motor engine crank set when it is running 其次，通过对当前国内外曲柄连杆机构动平衡实验的现状及其存在问题的分析研究，提出了一种新的测试方法：在工作原理上采用硬支承型测力式动平衡机，在测量方法上应用互成900的两点测量来失量合成任意一点旋转惯性力大小及方向，这也是也是其不同于以往试验机的最大之处。
Secondly , based on the defects of the uptodate balancing machine which were employed in the motorcycle manufacture plants , this dissertation has presented a new method on the means of checking unbalance mass of the motorcycle single - cylinder engine crank - connecting rod mechanism . it has adopted the hard - bearing balancing machine as the prototype , utilized tow group of resistance sensors placed in vertical direction with one another to pick up the information which stand for the inertial force of the motor engine crank set when it is running 其次，通过对当前国内外曲柄连杆机构动平衡试验的现状及其存在问题的分析研究，提出了一种新的测试方法：在工作原理上采用硬支承型测力式动平衡机，在测量方法上应用互成90的两点测量来矢量合成任意一点旋转惯性力大小及方向，这也是其不同于以往试验机的最大之处。
The research in this paper is mainly focused on the dynamic - balance theory of motor crank - set , dynamics of vibration unit of balance machine and test methods of dynamic balance diagnostic system . a dynamic balance test system is developed at the end of this paper , which is used for single cylinder motor 本文所做的主要工作围绕着对发动机曲柄连杆机构动平衡理论的研究、平衡机振动系统部分的动力学研究以及提出一种对发动机曲柄连杆机构做动平衡测试的测试方法来展开，最终建立了一套用于单缸发动机曲柄连杆的动平衡测试系统。
The moving manner of reciprocating i . c . e . shows its working processing of shock characteristic , simultaneously generates wild vibration and noise signal and often changes its operate speed . so it ' s difficult to get unique and simple spectrum unlike a rotary machine 内燃机往复式活塞和曲柄连杆机构的运动方式，决定了它具有冲击特点的工作过程，并且在实际应用中这种过程还是变工况的，它所产生的振动与噪声信号十分杂乱，不像旋转机械那样具用简洁的频谱特征。
It is applied to sorts of locomotive engine , in course of revolving of crank and connecting rod mechanism , there are revolving of the crankshaft , swinging of the connecting rod and reciprocating motion , so its motion state is complex , and periodic unbalanced force , by a few components , is great 曲柄连杆机构在高速运转过程中，有曲轴的转动、连杆的摆动及活塞的往复运动，其运动状态复杂，各个部件所产生的周期性不平衡惯性力大，是引起发动机振动的主要原因。
