随着涡旋转子的平移转动，各压缩室内容积不断发生变化，实现对气体的吸人与压缩。
As the rotor of rotation, the translation of the vortex each compression interior volume change constantly, realize the gas sucked and compression.
这样，对应于每一质量有三个自由度(两个平移和一个转动)。
Therefore, there are three degrees of freedom (two translational and one rotational) corresponding to every mass.
此外，设计变量上下限、各平移或转动自由度上的行程要求等也被作为约束考虑。
In addition, the upper and lower bounds of the design variables, the moving ranges in single translation or rotation degrees of freedom are also considered as constraints.
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