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PERFORMANCE EVALUATION OF TWO NONLINEAR CONTROLLERS ON AN ATTITUDE SYSTEM USING SGCMG

机译:基于SGCMG的姿态系统上两个非线性控制器的性能评估

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This paper deals with the modeling and simulation of an attitude control system composed of three Single Gimbal Control Moment Gyroscopes (SGCMG) in a pyramidal configuration using two nonlinear controllers. The first controller is a first-order sliding mode which is robust to bounded uncertainties such as modeling simplifications, sensor noise and external disturbances, but it causes high frequency input, which can exceed the limit of the power systems. To overcome the drawback of the sliding mode, an I&I adaptive control is proposed. This controller estimates unknown parameters by introducing new states, resulting in smaller input gains and frequencies. At first, the dynamic model of SGCMG and the dynamic model of the attitude system were constructed. Based on this model, the steering laws of the SGCMG 'sfor the two nonlinear controllers were designed. The simulation of the attitude control system is implemented in MATLAB. The simulation results show the effectiveness and the advantages of the proposed controllers.
机译:本文研究了一个姿态控制系统的建模和仿真,该姿态控制系统由三台单锥体控制力矩陀螺仪(SGCMG)构成,并采用两个非线性控制器进行金字塔构造。一阶控制器是一阶滑模,对有限的不确定性(例如建模简化,传感器噪声和外部干扰)具有鲁棒性,但会引起高频输入,这可能会超出电力系统的极限。为了克服滑动模式的缺点,提出了一种I&I自适应控制。该控制器通过引入新状态来估计未知参数,从而获得较小的输入增益和频率。首先,建立了SGCMG的动力学模型和姿态系统的动力学模型。在此模型的基础上,设计了两个非线性控制器的SGCMG的转向规律。姿态控制系统的仿真是在MATLAB中实现的。仿真结果表明了所提出控制器的有效性和优势。

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