ID 原文 译文
55417 针对一类含有未知干扰的不确定仿射非线性系统,讨论了一种基于高增益滑模观测器的执行器鲁棒检测方法。 For a class of uncertain affine nonlinear systems containing unknown disturbance, discussed a high-gain sliding mode observer based robust detection method of actuators.
55418 首先采用全局微分同胚变换,将非线性系统变换为一完全能观规范型;然后基于变换后含有Lipschitz项的非线性系统,设计了高增益滑模观测器,给出了观测器增益计算方法,并运用Lyapunov稳定性理论证明了观测器状态偏差的收敛条件,设计了滑模控制项来抑制干扰,并求解证明了滑模运动的收敛条件,以使设计的观测器具有鲁棒性;最后,对某三阶非线性电机模型进行仿真研究,验证了所提方法的有效性。 First USES the differential global homeomorphism transformation, the nonlinear system can transform into a complete view of type specification;Then based on the transformation of nonlinear systems with Lipschitz, designed a high-gain sliding mode observer, observer gain calculation method are given, and the observer is proved with Lyapunov stability theory, the condition of the convergence of the deviation, design the sliding mode control to suppress the interference, and solving proved the convergence condition of the sliding mode motion, to make the design robust observer;Of a third-order nonlinear motor model is carried out in the end, the simulation study, verify the effectiveness of the proposed method.
55419 逆合成孔径雷达(inverse synthetic aperture radar,ISAR)成像中,为了对目标进行方位向定标和距离徙动校正,需要估计雷达与目标的相对总转角。 Inverse synthetic aperture radar (inverse synthetic aperture radar, ISAR) imaging, in order to target azimuth and range migration correction to the calibration, the need to estimate the relative total Angle of radar and the target.
55420 在对Dechirp回波数据分析的基础上,提出了一种基于频谱包络相关的转角估计方法。 On Dechirp echo, on the basis of data analysis, this paper proposes a Angle estimation method based on frequency spectrum envelope.
55421 与相位对消法相比,所提算法无需知道目标大小等先验信息,且具有更好的鲁棒性。 Compared with the phase of elimination, the proposed algorithm does not need to know the target size, and so on a priori information, and has better robustness.
55422 通过对两个不同时刻信号频谱包络的相关,估计出方位向回波信号的二次项系数,并采用加权最小二乘对估计结果进行拟合,完成了对转角快速准确的估计,仿真实验证明了该方法的有效性。 Based on two different time signal envelope spectrum related to estimate the bearing to the quadratic term coefficient of echo signal, and USES the weighted least squares estimate results are fitted, completed the corner fast accurate estimate, simulation results prove the effectiveness of the method.
55423 为了提高再入制导的实时性和鲁棒性,设计一种标准轨迹跟踪制导方法。 In order to improve the reentry guidance of real-time and robustness, design a kind of standard trajectory tracking guidance method.
55424 首先将参考轨迹的跟踪问题转化为轨迹状态调节问题,进一步转化为一个线性时变系统的最优控制问题;然后采用滚动时域控制结合基于间接Legendre伪谱法的最优反馈控制算法设计出一种易于在线实现的制导律。 Will first reference trajectory tracking problem is transformed into trajectory parameter adjustment problems, further converted to a linear optimal control problem of time-varying system;And then USES the rolling of time control based on indirect Legendre pseudo-spectral method, the optimal feedback control algorithm designed a easier to implement online guidance law.
55425 基于上述工作完成了亚轨道飞行器(suborbital reusable launch vehicle,SRLV)返回制导过程的3自由度数值仿真研究工作。 Based on the above work completed the orbiter (suborbital these reusable launch vehicle, SRLV) returns the guidance 3 dof numerical simulation research.
55426 数值算例说明,该制导方法在初始点状态存在较大范围偏差和气动参数存在较大误差的情况下具有良好的鲁棒性。 A numerical example shows that the guidance method in the initial state is put in bigger range bias and the presence of larger error aerodynamic parameters has good robustness.