曲柄滑块机构运动分析

曲柄滑块机构运动分析一、相关参数在图1所示的曲柄滑块机构中，已知各构件的尺寸分别为mm l 1001=,mm l 3002=,s rad /101=ω,试确定连杆2和滑块3的位移、速度和加速度，并绘制出运动线图。

图1 曲柄滑块机构二、数学模型的建立1、位置分析为了对机构进行运动分析，将各构件表示为矢量，可写出各杆矢所构成的封闭矢量方程。

C S l l =+21将各矢量分别向X 轴和Y 轴进行投影，得sin sin cos cos 22112211=+=+θθθθl l S l l C(1)由式（1）得 ⎪⎪⎭⎫ ⎝⎛-=2112sin arcsin l l θθ 2211cos cos θθl l S C +=2、速度分析将式（1）对时间t 求导，得速度关系C v l l l l =--=+222111222111sin sin 0cos cos θωθωθωθω （2）将（2）式用矩阵形式来表示，如下所示 ⎥⎦⎤⎢⎣⎡-=⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡-1111122222cos sin . 0 cos 1 sin θθωωθθl l v l l C （3） 3、加速度分析将（2）对时间t 求导，得加速度关系⎥⎦⎤⎢⎣⎡--=⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡+⎥⎦⎤⎢⎣⎡⎥⎦⎤⎢⎣⎡-1111111222222222222sin cos 0 sin 0 cos 0 cos 1 sin θωθωωωθωθωαθθl l v l l a l l C C三、计算程序1、主程序%1.输入已知数据clear;l1=0.1;l2=0.3;e=0;hd=pi/180;du=180/pi;omega1=10;alpha1=0;%2.曲柄滑块机构运动计算for n1=1:721theta1(n1)=(n1-1)*hd;%调用函数slider_crank计算曲柄滑块机构位移、速度、加速度[theta2(n1),s3(n1),omega2(n1),v3(n1),alpha2(n1),a3(n1)]=slider_crank(theta1(n1),omega1,alp ha1,l1,l2,e);endfigure(1);n1=0:720;subplot(2,3,1)plot(n1,theta2*du);title('连杆转角位移线图');xlabel('曲柄转角\theta_1/\circ');ylabel('连杆角位移/\circ');grid onsubplot(2,3,2)plot(n1,omega2);title('连杆角速度运动线图');xlabel('曲柄转角\theta_1/\circ');ylabel('连杆角速度/rad\cdots^{-1}');grid onsubplot(2,3,3)plot(n1,alpha2);title('连杆角加速度运动线图');xlabel('曲柄转角\theta_1/\circ');ylabel('连杆角加速度/rad\cdots^{-2}');grid onsubplot(2,3,4)plot(n1,s3);title('滑块位移线图');xlabel('曲柄转角\theta_1/\circ');ylabel('滑块位移/\m');grid onsubplot(2,3,5)plot(n1,v3);title('滑块速度运动线图');xlabel('曲柄转角\theta_1/\circ');ylabel('滑块速度/m\cdots^{-1}');grid onsubplot(2,3,6)plot(n1,a3);title('滑块加速度运动线图');xlabel('曲柄转角\theta_1/\circ');ylabel('滑块加速度/m\cdots^{-2}');grid on2、子程序function[theta2,s3,omega2,v3,alpha2,a3]=slider_crank(theta1,omega1,alpha1,l1,l2,e);%计算连杆2的角位移和滑块3的线位移s3=l1*cos(theta1)+l2*cos(theta2);theta2=asin((e-l1*sin(theta1))/l2);%计算连杆2的角速度和滑块3的线速度A=[l2*sin(theta2),1;-l2*cos(theta2),0];B=[-l1*sin(theta1);l1*cos(theta1)];omega=A\(omega1*B);omega2=omega(1);v3=omega(2);%计算连杆2的角加速度和滑块3的线加速度At=[omega2*l2*cos(theta2),0;omega2*l2*sin(theta2),0];Bt=[-omega1*l1*cos(theta1);-omega1*l1*sin(theta1)];alpha=A\(-At*omega+alpha1*B+omega1*Bt);alpha2=alpha(1);a3=alpha(2);四、程序运行结果与分析图2 运动规律曲线图从仿真曲线可以看出，当曲柄以w1=10rad/s匀速转动时，连杆的转角位移变化X围大约在-20～20度之间，在90°或270°有极值，呈反正弦变化趋势；连杆的角速度变化X围大约在-3.3～3.3rad/s，在0°或180°有极值，成反余弦变化趋势；连杆角加速度变化X围大约在-35～35rad/s2，在90°或270°有极值，呈正弦变化趋势。

曲柄滑块机构的运动精度分析与计算宋亮;赵鹏兵【摘要】曲柄滑块机构是一种典型的四连杆机构,尽管设计时理论计算可以达到很高的精度,但是由于构件的制造误差及运动副的配合间隙等因素,会使机构在运动中产生输出误差,有时还会显著超出机构设计的允许误差.依据概率统计的相关理论进行机构设计,即考虑构件制造尺寸的随机误差,以保证机构运动的精度在允许的误差范围内.利用MATLAB进行仿真计算和实例研究,得出了理论设计和精度分析的计算结果.该方法准确、效率高、而且适合其它类型的机构设计,具有较大的工程实际应用价值.%Slider-crank mechanism is a typical four-bar linkage, in spite of the high precision when it' s calculated theoretically. The manufacturing error and kinematic pair clearance of the components will lead to the output error during the motion of the mechanism. Sometimes,it will significantly exceed the tolerance of the design. According to the probability and statistics theory, the mechanism is designed, that' s considering the random error of the component to make sure that the motion accuracy is in the allowed error range. Utilizing MATLAB to simulate and calculate based on case studies. and the theoretical design and accuracy analysis are obtained. This method is accurate and very efficiently, it also can be used in other kind of mechanism design, and it has much more practical value in engineering.【期刊名称】《科学技术与工程》【年(卷),期】2011(011)010【总页数】5页(P2201-2205)【关键词】曲柄滑块机构;运动学;概率设计;等影响法;精度分析【作者】宋亮;赵鹏兵【作者单位】海军装备部,西安,710043;西北工业大学现代设计与集成制造技术教育部重点实验室,西安,710072【正文语种】中文【中图分类】TH112.1曲柄滑块机构是一种单移动副的四连杆机构，如图1和图2所示，分别为对心和偏心曲柄滑块机构。

目录1 引言1．1 选题的依据及意义·························································································（1）1．2 国内外研究概况及发展趋势··········································································（2）1．3 论文主要工作·······························································································（3）2 曲柄（导杆）滑块机构简介····································································（4）3 曲柄（导杆）滑块机构的运动学分析3．1 曲柄导杆滑块机构的运动分析······································································（5）3．1．1 机构装配的条件····················································································（6）3．1．2 建立数学模型·························································································（6）3．1．3 计算机辅助分析及其程序设计······························································（9）3. 2曲柄滑块机构的运动分析3．2．1 机构装配的条件·····················································································（25）3．2．2 建立数学模型·······················································································（25）3．2．3 计算机辅助分析及其程序设计·····························································（27）4 曲柄（导杆）滑块机构实验台装置设计4. 1 实验台结构·································································································（40）4.2 实验台硬件操作说明···················································································（41）4.3 用SolidWorks 2006实现实验台的立体图形················································（42）总结·········································································································（46）参考文献·········································································································（47）致谢·········································································································（48）1 引言1．1 选题的依据及意义1．曲柄（导杆）滑块机构定义曲柄滑块机构是铰链四杆机构的演化形式,由若干刚性构件用低副(回转副、移动副)联接而成的一种机构。

曲柄滑块机构的运动分析及应用精编W O R D版IBM system office room 【A0816H-A0912AAAHH-GX8Q8-GNTHHJ8】机械原理课程机构设计实验报告题目：曲柄滑块机构的运动分析及应用小组成员与学号：刘泽陆(11071182)陈柯宇 (11071177)熊宇飞(11071174)张保开 (11071183)班级： 1107172013年6月10日摘要 (3)曲柄滑块机构简介 (4)曲柄滑块机构定义 (4)曲柄滑块机构的特性及应用 (4)曲柄滑块机构的分类 (8)偏心轮机构简介 (9)曲柄滑块的动力学特性 (10)曲柄滑块的运动学特性 (11)曲柄滑块机构运行中的振动与平衡 (14)参考文献 (15)组员分工 (15)摘要本文着重介绍了曲柄滑块机构的结构，分类，用途，并进行了曲柄滑块机构的动力学和运动学分析，曲柄滑块机构的运动学特性分析，得出了机构压力表达式，曲柄滑块机构的运动特性分析，得出了滑块的位移、速度和加速度的运动表达式。

最后，对曲柄滑块机构运动中振动、平衡稳定性等进行了总结。

关键字：曲柄滑块动力与运动分析振动与平稳性ABSTRACTThe paper describes the composition of planar linkage, focusing on the structure, classification, use of a slider-crank mechanism and making the dynamic and kinematic analysis, kinematics characteristics of the crank slider mechanism analysis for a slider-crank mechanism, on one hand , we obtain the drive pressure of the slider-crank mechanism ,on the other hand,we obtain the expression of displacement, velocity and acceleration of movement. Finally, the movement of the vibration and balance stability of the crank slider mechanism are summarized.曲柄滑块机构简介曲柄滑块机构定义曲柄滑块机构是铰链四杆机构的演化形式,由若干刚性构件用低副(回转副、移动副)联接而成的一种机构。

研究生课程论文科目：是否进修生？是□ 否■偏置曲柄滑块机构的运动学分析摘要：综合利用函数法和矢量法，在ADAMS软件中对偏置式曲柄滑块机构进行了仿真和运动分析。

首先，通过函数法对偏置式曲柄滑块机构的运动特性进行分析，根据矢量法建立机构的运动学矩阵方程。

然后，介绍了ADAMS在偏置曲柄滑块机构运动学及动力学分析中的应用。

通过对偏置曲柄滑块进行仿真和分析，得到其运动曲线。

该方法的仿真形象直观，测量方便，在机械系统运动学特性分析中具有一定的应用价值。

关键词：偏置曲柄滑块；ADAMS；仿真；运动学Abstract: The article analyzes the simulation and kinetic characteristic of deflection slider-crank mechanism by the function and the vector method in ADAMS．The kinematic equation of the deflection slider-crank mechanism is established by vector method. The application of ADAMS in kinematics analysis of slider-crank mechanism is presented. The motion and dynamic curves of offset slider-crank by ADAMS/View is obtained. In the method, simulation is authentic, visualized and convenient in measurement. The result shows that the method is efficient and useful in the kinematic characteristics analysis of mechanism.Keyword: offset slider-crank mechanism ; ADAMS; simulation ; kinematic0.引言平面连杆机构是由若干个构件用低副(转动副、移动副)连接组成的平而机构，它不仅在众多工农业机械和工程机械中得到广泛应用，还应用于人造卫星太阳能板的展开机构、机械手的传动机构等。