动载体光电平台角振动隔振设计

Design of Angular Vibration Isolation for Optoelectronic Platform on Moving Vehicle

动载光电系统具有机动灵活、实时准确、视场范围广、针对性强等特点,是获得各种图像信息的主要平台。光电系统由于受内部和外部振动的影响,其任务载荷在相对恶劣的环境下工作,为提高任务载荷的成像质量,有必要对光电平台的振动环境加以改善,减少对成像质量影响较大的角振动。通过对动载体平台振动及其对成像质量的影响分析,根据动力学普遍原理建立了两轴四框架光电平台的隔振模型,采用在内外框架之间对称的弹性布局方案,有效地解除了线振动对角振动的耦合影响;合理地选择弹性参数,有效提高了角振动的隔离效果。

The optoelectronic system on moving vehicle is the basic platform to achieve the image informations with such characteristics as good maneuverability, agility, aeeuracy, real-time and pertinence. At bad environment, because of disturbances from outer and inner, and the isolation of the system must be enhanced to improve the quality of image, especially the angular vibration influence must be redueed. Through analyzing the platform vibration and influence on the image quality , the isolation model of platform with two axes and four frames has been built up according to the theory of dynamics. In order to relieve the coupling between the angular vibration and the line vibration, the symmetrical layout of elasticity set-up is adopted. The angular vibration is greatly decreased by choosing the correct elasticity parameters.