论文部分内容阅读
针对纵向模态和横航向模态都不稳定的一种通用的高超声速飞行器,建立了三维紊流及紊流梯度下的高超声速飞行器全状态线性化的动力学模型。在考虑三维紊流和紊流梯度干扰和系统测量噪声条件下,提出了一种基于离散卡尔曼滤波的全状态H∞反馈增稳控制器。该方法通过卡尔曼滤波器将状态估计值作为反馈量传递给H∞控制器,能保证存在三维大气紊流干扰,系统测量噪声和飞行条件变化所引起的系统参数矩阵摄动时的鲁棒性。仿真结果表明,不管是针对标称模型还是参数摄动后的模型,基于卡尔曼滤波器的H∞反馈增稳控制器能有效抑制外界干扰和系统自身参数摄动,说明该方法具有较强的鲁棒性。
A generalized hypersonic vehicle with unstable longitudinal and transverse modes is established. The dynamic model of all-state linearization of hypersonic vehicles under three-dimensional turbulence and turbulent gradients is established. Under the conditions of three-dimensional turbulence and turbulent gradient interference and system measurement noise, a state-variable H∞ feedback stabilization controller based on discrete Kalman filter is proposed. This method uses the Kalman filter to pass the state estimation as feedback to the H∞ controller, which can ensure the robustness of the system parameter matrix perturbation caused by three-dimensional atmospheric turbulence interference, system measurement noise and flight conditions changes . The simulation results show that the H∞ feedback stabilization controller based on Kalman filter can effectively suppress the disturbance and the perturbation of the system parameters both for the nominal model and the perturbed model, indicating that this method is robust Robustness.