The relationship between stiffness variation and performance of electromagnetic-air spring vibration isolator

Abstract

In order to isolate the structural vibration in high-frequency range effectively and constrain the peak response value near the natural frequency, an experience method using electromagnetic-air spring vibration isolator was put forward based on the respective advantages of electromagnetic actuator and air spring. In this article, a stiffness expression and a natural frequency of the system was worked out. A dynamic model of the electromagnetic-air spring vibration isolator system and an expression of the force transmission were established. Moreover, the relationship between stiffness variation and performance of the electromagnetic-air spring vibration isolator system was analyzed. The calculation and simulation analysis of the example demonstrated that in the condition of satisfying loading capacity with the increase in magnetic suspension isolator's displacement stiffness and the decrease in air spring's stiffness, the performance of vibration isolation is improved.