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首页> 外文会议>International Astronautical Congress(IAC2006); 20061002-06; Valencia(ES) >LSS VIBRATION DAMPING BY USING ACTIVE CONTROL STRATEGY
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LSS VIBRATION DAMPING BY USING ACTIVE CONTROL STRATEGY

机译：采用主动控制策略的LSS减振

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摘要

This paper presents an active control strategy for a large space structure (LSS) whose dynamics is characterized by rigid and flexible motion interaction in an orbital environment. The main features considered for the space environment are the gravity-gradient torque and the aerodynamics effect. Both of these aspects are consistent with the low Earth orbit and the large solar array assumptions for the LSS model. The LSS attitude control system includes three reaction wheels and jet gas as actuators. The interaction under analysis is the solar array vibration excitations when the actuators are on to maneuver or to control the LSS station attitude close to the nominal specifications. The assumed mode discretization technique is used to model the solar array elastic displacements. This technique requires the choice of space functions that must satisfy at least the geometric boundary conditions associated with the solar array configuration. By the assumed modes technique those functions do not have to necessarily satisfy the differential equation nor the natural boundary conditions. Another modeling aspect of this approach is that the plates are better represented when two functions are chosen to model the elastic displacement. Both functions are associated with free-free and clamped-free beams configurations, respectively. The mathematical model was derived by the Lagrangian formulation for both quasi-coordinates and
机译：本文提出了一种大空间结构（LSS）的主动控制策略，该结构的动力学特征是在轨道环境中发生刚性和柔性运动相互作用。考虑到空间环境的主要特征是重力梯度转矩和空气动力学效应。这两个方面都与LSS模型的低地球轨道和大型太阳阵列假设一致。 LSS姿态控制系统包括三个反作用轮和喷射气体作为执行器。分析中的相互作用是当执行器进行操纵或将LSS站的姿态控制为接近标称规格时，太阳能电池阵列的振动激励。假定的模式离散技术用于对太阳能电池阵列的弹性位移进行建模。该技术要求选择必须至少满足与太阳能电池阵列配置相关的几何边界条件的空间函数。通过假定的模式技术，那些函数不必一定要满足微分方程或自然边界条件。此方法的另一个建模方面是，当选择两个函数对弹性位移进行建模时，可以更好地表示板。两种功能分别与自由-自由梁配置和自由-夹持梁配置相关联。通过拉格朗日公式得出了准坐标和

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