无陀螺大挠性多体卫星的自抗扰姿态控制

研究了最近提出的非线性自抗扰控制器在大挠性多体卫星姿态控制中的应用问题。在无陀螺测量情况下 ,提出了一种自抗扰姿态控制器 ,并与使用于某挠性卫星的有陀螺测量的古典PID姿态控制器 ,从鲁棒性、干扰抑制、动静态性能指标和振动抑制等方面进行了比较。在考虑了反作用轮和敏感器的实际非线性和敏感器噪声影响情况下 ,仿真表明 :自抗扰姿态控制器 ,除在振动抑制和控制误差精度方面略差外 ,其它各方面均优于古典PID姿态控制器。该文提出的自抗扰姿态控制器 ,在无陀螺或陀螺故障下 ,实现挠性多体卫星的高精度高稳定度姿态控制 ,具有实际的应用价值

Active Disturbance Rejection Attitude Controller for Large Flexible Multi - body Satellite without Gyroscopes

The recently developed nonlinear Active Disturbance Rejection Controller (ADRC) was applied to the attitude control of large flexible multi-body satellite with reaction wheels. A nonlinear Active Disturbance Rejection Attitude Controller (ADRAC) was proposed for the satellite without the measurements of gyroscopes. For comparison purpose, a classic PID controller which was actually used in certain flexible satellite with gyroscopes was considered. Then a comparison was made with the ADRAC and the PID controller in terms of robustness, disturbance attenuation, dynamical and steady performance specification and vibration suppression. Considering the effects of the realistic nonlinearities in the reaction wheels and sensors and the noises of sensors, the simulations show that the ADRAC significantly outperforms the PID except vibration suppression and control accuracy of errors. The proposed ADRAC is valuable for the attitude control of high accuracy and high stabilization for flexible multi-body satellite without gyroscopes in practical applications.