In the design of linear motor platform, the choice of base is very important, it is not only the support structure of the motor platform, but also directly affects the vibration characteristics of the whole system. As a high quality material, granite is widely used in the manufacture of precision base because of its high stability, high stiffness and excellent chemical resistance. Among them, the natural frequency of granite precision base is one of the key factors affecting the vibration characteristics of linear motor platform.
I. Overview of natural frequency of granite precision base
Natural frequency is the specific frequency of the object in the free vibration, it is the physical property of the object itself, and the shape of the object, material, mass distribution and other factors. In the linear motor platform, the natural frequency of the granite precision base refers to the frequency of its own vibration when the base is stimulated externally. This frequency directly reflects the stiffness and stability of the base.
Second, the influence of natural frequency on vibration characteristics of linear motor platform
1. Control of vibration amplitude: When the linear motor vibrates during operation, if the natural frequency of the granite base is close to or the same as the vibration frequency of the motor, resonance will occur. Resonance will cause the vibration amplitude of the base to increase sharply, which will have a serious impact on the stability and accuracy of the whole system. Therefore, the natural frequency of the base can be improved by selecting the appropriate granite material and optimizing the design of the base, which can effectively avoid the occurrence of resonance phenomenon and control the vibration amplitude.
2. Dispersion of vibration frequency: In the linear motor platform, due to the influence of various factors, the vibration frequency of the motor may change. If the natural frequency of the granite base is single or concentrated in a certain frequency band, it is easy to overlap or approach the vibration frequency of the motor, thereby causing resonance. The granite base with high natural frequency often has a wider frequency dispersion range, which can better adapt to the change of the motor vibration frequency and reduce the occurrence of resonance.
3. Vibration transmission barrier: The high natural frequency of the granite base also means that it has high stiffness and stability. When the motor vibrates, the vibration energy will be rapidly dispersed and blocked when transmitted to the base, thereby reducing the impact on the entire system. This barrier effect is helpful to improve the stability and accuracy of the linear motor platform.
Third, the method of optimizing natural frequency of granite base
In order to improve the natural frequency of granite base, the following measures can be taken: first, choose granite material with higher stiffness and stability; The second is to optimize the design structure of the base, such as increasing the reinforcement and changing the cross-section shape; Third, the use of advanced processing technology and technology to improve the processing accuracy and quality of the base.
In summary, the natural frequency of granite precision base has an important influence on the vibration characteristics of linear motor platform. The vibration characteristics of the whole system can be improved effectively, and the stability and accuracy of the system can be improved by selecting suitable materials, optimizing design and processing technology to increase the natural frequency of the base.
Post time: Jul-25-2024