惯性稳定平台不平衡扰动建模与仿真分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (8) : 138-142.

论文

惯性稳定平台不平衡扰动建模与仿真分析

李明，李洁，张延顺

作者信息 +

Modeling and simulation of imbalance disturbance for inertially stabilized platform

LI Ming, LI Jie, ZHANG Yanshun

Author information +

文章历史 +

摘要

理想情况下，惯性稳定平台的质心会位于其旋转轴上，但是由于加工技术等条件的限制，惯性稳定平台的质心会偏离旋转轴，并且在基座角运动和摩擦等扰动作用下，惯性稳定平台会产生偏转角，偏转角的变化会引起水平和垂直方向上的不平衡力臂变化，形成不平衡扰动。为了分析不平衡扰动对平台性能的影响，在对惯性稳定平台的动力学模型进行简化的基础上，提出通过分析平台偏转角和不平衡力臂的变化规律建立不平衡扰动模型的思想方法，以所建模型为基础，对不平衡扰动的影响进行了定量分析。仿真结果表明，不平衡扰动会使平台的角度输出稳态值超过其稳定精度要求，严重影响惯性稳定平台的稳定性能。

Abstract

Ideally, the centroid of inertially stabilized platform is located in the axis of rotation, but in fact, the centroid of inertially stabilized platform will deviate the axis of rotation because of the limit of processing technology. What's more, under the function of base angle movement and friction, inertially stabilized platform will produce deflecting angle. And the change of deflecting angle will cause change of the arm of force in the horizontal and vertical direction, in this case, imbalanced disturbance comes into being. In order to analyze the influence of imbalance disturbance, it takes the simplified dynamical model of inertially stabilized platform as basis, and introduces the idea of establishing unbalanced disturbance via analyzing the changing rule of deflecting angle and the arm of force. Based on the unbalanced disturbance, it analyses the effect of unbalanced disturbance towards inertially stabilized platform from quantitative simulation. The results show that the output angle of inertially stabilized platform in stabilized state exceeds the stabilized demand under the function of unbalanced disturbance, and stabilized performance of stabilized platform is affected heavily.

导出引用

李明，李洁，张延顺. 惯性稳定平台不平衡扰动建模与仿真分析[J]. 振动与冲击, 2016, 35(8): 138-142

LI Ming, LI Jie, ZHANG Yanshun. Modeling and simulation of imbalance disturbance for inertially stabilized platform[J]. Journal of Vibration and Shock, 2016, 35(8): 138-142

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