这种双稳定性的基础是什么？

What is the basis for this bistability?

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型阀采用双轴承结构，机械稳定性高，启动扭矩小，保证了阀门具有极好的灵敏度和感应速度。

V-valve dual-bearing structure, mechanical stability, high starting torque is small, to ensure the valve sensor with excellent sensitivity and speed.

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双万向轴的优化数学模型必须满足强度、刚度、振动条件、稳定性及边界条件的约束。

The optimal mathematical model of the double universal spindle must satisfy the constraints of strength, rigidity, vibration condition, stability and boundary condition.

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