CAJ | 학술논문

含减振器的惯性测量组合呈现出典型的非线性特征。建立了含立方刚度非线性的二自由度集中参数系统作为惯组机械传递率测试模型。用龙格库塔法求解出二自由度渐软非线性系统对随机激励的响应。比较了不同形式激励下系统的传递特征。结果表明自由度之间的耦合导致单维激励和多维激励的结果存在可观的差别。设计了惯组模拟件的典型试验，验证了仿真计算的结果。如若使结果偏保守，在同等的激励量级下，应当采用多维随机试验。
함감진기적관성측량조합정현출전형적비선성특정。건립료함립방강도비선성적이자유도집중삼수계통작위관조궤계전체솔측시모형。용룡격고탑법구해출이자유도점연비선성계통대수궤격려적향응。비교료불동형식격려하계통적전체특정。결과표명자유도지간적우합도치단유격려화다유격려적결과존재가관적차별。설계료관조모의건적전형시험，험증료방진계산적결과。여약사결과편보수，재동등적격려량급하，응당채용다유수궤시험。
Inertial measurement unit (IMU) with vibration absorber displays typical nonlinear character. The two degree of freedom system with cubic stiffness non-linearity is employed to obtain IMU machine transmissibility measurement model. The lumped parameter motion differential equation for the random vibration input is solved by Runge-Kutta method. The frequency response characteristic is compared for different types of excitation. It is shown that there is the considerable distinction for single-exciter and multi-exciter due to non-linear coupling effect. The typical test of IMU model pattern is induced to validate simulated program and conclusion. If a more conservative result is required, multi-exciter random vibration test is recommended on the condition of the same vibration level.