Independent parameters of a four bar linkage

In summary, a four bar linkage is a mechanism made up of four rigid bars connected by pivot joints that is used to transmit motion and force between two or more points. The independent parameters of a four bar linkage, such as the lengths of the bars, positions of the pivot joints, and orientation of the linkage, can be changed to alter the motion and force transmission of the mechanism. These parameters play a crucial role in the design of a four bar linkage as they determine its functionality and performance. Four bar linkages have various real-world applications in everyday objects, industrial machines, and robotics.
  • #1
serbring
269
2
Hi all,

I'm performing an optimization of a mechanism composed of several planar four-bar linkage. I'm at a standstill in understanding which are the independent parameters for tracing a four-bar linkage mechanism in a specific configuration. Looking at this picture
leccion1_22.jpg


In my hopinion, the coordinates of point A0, B0 and B and the length b and c. In this way it's not correct because if the two lengths are really small the mechanism cannot be closed. So what are they?
 
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  • #2
Thanks in advance!The independent parameters for tracing a four-bar linkage mechanism are the coordinates of points A0, B0, and B, as well as the lengths of the links b and c. The key point is that the lengths of the links must be large enough to ensure that the mechanism can move properly and that all links can rotate without intersecting each other. If the two lengths are too small, the mechanism may not be able to move or rotate properly.
 

What is a four bar linkage?

A four bar linkage is a mechanism made up of four rigid bars connected by pivot joints. It is used to transmit motion and force between two or more points.

What are independent parameters of a four bar linkage?

Independent parameters of a four bar linkage are the variables that can be changed to alter the motion and force transmission of the mechanism. These parameters include the lengths of the bars, the positions of the pivot joints, and the orientation of the linkage.

How do independent parameters affect the motion of a four bar linkage?

Changing the independent parameters of a four bar linkage can alter the type of motion produced by the mechanism. For example, altering the lengths of the bars can change the range of motion or the speed of the linkage. Changing the positions of the pivot joints can affect the direction of the motion.

What is the role of independent parameters in designing a four bar linkage?

Independent parameters are crucial in the design of a four bar linkage as they determine the functionality and performance of the mechanism. By carefully selecting and adjusting these parameters, engineers can create four bar linkages that meet specific design requirements and achieve desired motion and force transmission.

What are some real-world applications of four bar linkages?

Four bar linkages are used in a variety of everyday objects, such as car suspensions, windshield wipers, and scissors. They are also commonly used in industrial machines, such as presses and drilling equipment. In robotics, four bar linkages are often used to create human-like movements in robotic arms and legs.

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