1、外文资料翻译 1 中文 4545 字 Crankshaft three degrees of freedom use the same parallel micro-mechanical structure of the experimental design Abstract: Crankshaft in mechanical structure design of the small general has been replaced mechanical connection and extensive use. However, the wrong model will be redu
2、ced Crankshaft precision mechanical structure. In this paper, in order to get the correct model Crankshaft and design of a 3-DOF planar the same type of micro-mechanical structure. To that end, an initial analysis of kinematics including inverse kinematics, internal kinematics and coordination of th
3、e work of a fixed model has been raised. First of all, take into account a freedom Crankshaft cycle type, but FEM based on the simulation results is inconsistent with the analysis of the results. This is because small axial direction along the connecting rod extended to hinder the accuracy of the me
4、chanical connection. To address this problem, including an additional sports bodies such as the prism connecting the two degree of freedom model Crankshaft has already begun to use some. According to this model, ensure the accuracy of the mechanical structure. Through simulation and test showed that
5、 the accuracy of this model is effective. This work emphasized the model Crankshaft Crankshaft guarantee the accuracy of the micro-mechanical structure tied to the use of great significance. .Introduction Micro-mechanical devices in many areas is a key and essential techniques, such as scanning elec
6、tron microscopy, X-ray lithography, mask alignment and micro-machinery. Recently, a lot of Crankshaft on the use of micro-mechanical structure of the analysis and experimental research. The majority of previous studies (Moriyama 1, 2, such as Taniguchi, Tomita, etc. 3, 4, such as Ryu, Chang, etc. 5,
7、 6 Peng, etc., etc. 10 - 13 ) is the freedom to use an arm for recycling Crankshaft, three degrees of freedom for Crankshaft spherical arm, and thus the production model. However, sometimes even a small total, will do Crankshaft linear motion. Some researchers believe that there is a Crankshaft addi
8、tional degree of freedom. However, they ignored the model in the process of easy mobility, but also not to micro-mechanical structure in the correct use of the fixed model. This led to the 外文资料翻译 2 failure of the implementation of micro-systems. Therefore, the focus of this work will be easy mobilit
9、y is based on the analysis of the accuracy of model Crankshaft. Introduction of the campaign because of the number of independent variables were constrained, and these independent variables, in order to find the relevant links between objects must be clearly defined. Above formula can be adopted (1)
10、 to describe the type of M, N, L, respectively Fi j and that movement, freedom of space operations, the number of links, as well as linking of the number of mobile connections i freedom. Exercise also shows that the minimum functioning of the system. When M N bigger than the sport become redundant s
11、ystem. Figure 1 shows a Crankshaft have freedom of the three micro-mechanical structure. Usually, these systems can be Crankshaft rotary connector of the model. Outlined in Figure 2 of the model Crankshaft. If all Crankshaft have a degree of freedom, then the movement of the system are three degrees
12、 of freedom. However, in the past, based on such assumptions are the result of the failure of this model because of the inaccuracy of Crankshaft. On the other hand, if all are Crankshaft model of the rotary connector and prism of connections, then the campaign structure reached 12 degrees of freedom
13、. Even if the limit of program analysis and theoretical analysis will enable the two degree of freedom model Crankshaft than one degree of freedom model Crankshaft more accurate results, but need 12 to control the operation of three degrees of freedom rather expensive. Therefore, not only the design
14、 of Crankshaft to campaign structure to a minimum, but also to ensure that the structure of precision machinery and sufficient working space. In this paper, we designed two types of Crankshaft. The first type used only a relative degree of freedom to produce thicker neck parts, as shown in Figure 2,
15、 this shows that the thickness of the hinge. The second type is used to produce two-DOF relatively thin neck parts. Therefore, the second Crankshaft is a freedom with the rotary connector and a freedom connected to the prism production model. If the system of each chain are two degrees of freedom by
16、 a hinge and a two degree of freedom of the hinge, then the campaign structure is 6. Therefore, this Crankshaft through six operating structure to operate. 外文资料翻译 3 Papers content in the next there will be further development. The second part describes the structure of the system. Kinematic analysis
17、 and three campaigns campaign structure and six fixed structural system analysis model respectively in the third and fourth part of a demonstration. Part V describes the two comparative freedom and freedom of a Crankshaft precision simulation results, but also embodies the six recommended by the mov
18、ement of the systems benefits. Correct the effectiveness of this model can be reflected through experiments. .the system structure The text of the proposed three-DOF tied in the same mechanical structure is a working platform and composed of three chains, each chain has three Crankshaft, as shown in
19、 Figure 1. This mechanical link in the use of all the Crankshaft, and all are connected through the pressure of the movement and operation factors. February 2 chain of three intervals between 120 . This symmetrical structure reduced due to temperature differences and the impact of temperature imbala
20、nce. Each chain connecting the first and the third are at the bottom with the machines connected to a pressure campaign structure to operate the contrary. All the movement to promote structural connections of each round good sliding surface and rotation. In the example in Figure 2 a type Crankshaft.
21、 This rotational movement Crankshaft equivalent to the displacement of I2 and h () and. In the X direction of the linear motion distance of A (). . three campaign kinematic structure of the system In order to demonstrate a degree of freedom model of the movement of Crankshaft, we will be presented i
22、n Figure 3 of this three movement kinematics model of the system. All the previous model Crankshaft only one degree of freedom, and this system has three campaign structure. Passed the map can clearly understand this kinematic analysis. A first kinematics First kinematics connected to the output rate vector and vector rate independent of the connection. Below, G said Jacobian, the lower left-hand corner of G machinery that tied the hands of the chain of consecutive numbers. G top right hand corner and lower right corner of the symbols that were related or independent
