Synthesis And Visualization Research Of Planar Linkage Mechanism

The linkage mechanism is widely used in various types of machinery and instruments due to its advantages such as large bearing capacity,low wear,long life,and meeting the requirements of various laws of movement.The subject comprehensively used mechanism theory,computer technology,software programming,etc.,and carried out the scale synthesis and design results of the planar link mechanism according to the actual requirements such as the stroke speed ratio coefficient K,the corresponding movement law of the two side links,and the expected trajectory.In-depth research was made on the optimization design of the crank rocker mechanism and the offset crank slider mechanism according to the stroke speed ratio coefficient K.The values and mathematical relationships of the relevant parameters of type I and II crank rocker mechanisms and offset crank slider mechanisms were deduced,and a mathematical model for solving the minimum transmission angle ming was constructed.A 3d surface diagram was drawn.It can quickly complete the design of the crank rocker mechanism / offset crank slider mechanism that realizes the rocker swing angle / slider stroke and stroke speed ratio coefficient and the best force transmission performance.The design problem of the crank rocker mechanism that realizes the corresponding movement law of two side links was studied,the theoretical derivation was established,the mathematical model of optimal design was established,the selection and determination of the number of design variables were discussed in depth,drawn and analyzed the 3d surface graph and 2d contour map of the deviation of the joystick angle.The modeling and analysis of the secondary optimization that optimizes the force transmission performance within a small range were studied.It can quickly complete the design of optimal reproduction of the movement law of the side link of the crank rocker mechanism and the optimization design of the force transmission performance to control the deviation of the movement law within a small range.The optimized synthesis of the desired trajectory of the hinge four-bar mechanism,the double-crank hinge five-bar mechanism,and the single-loop hinge six-bar mechanism were studied respectively.The meaning of the harmonic characteristic parameters of the coupler curve,the extraction algorithm and the influencing parameters were studied in depth,and the mathematical equations for solving the dimensions of each mechanism were derived.With the smallest difference in amplitude between the expected trajectory and the harmonic characteristic parameter of the point P trajectory on the coupler as the optimization target,the mechanism synthesis with the best transmission characteristics at any point trajectory can be performed.In addition,kinematic equations were established for all the above-mentioned mechanisms,and the real-time dynamic simulation and kinematic analysis of the mechanisms were achieved with Matlab.With the help of GUI technology,the entire content was organically integrated,and a user-friendly computer-aided design system was written.The design requirements were entered through human-computer interaction to quickly complete the synthesis and visualization of a more convenient method and means for the design of the planar link mechanism.Figure43;Table9;Reference55...