ID 原文 译文
49036 仿真及实测数据处理结果验证了所提算法的有效性。 Simulation and actual data processing results show the effectiveness of the proposed algorithm.
49037 针对非线性系统模型预测控制中预测模型容易失配且目标函数难以求解的问题,提出了一种基于在线支持向量机建模和遗传算法滚动优化的模型预测控制方法。 Model predictive control of nonlinear system prediction model is easy to mismatch and the objective function is difficult to solve the problem, this paper proposes a rolling based on online support vector machine (SVM) modeling and genetic algorithm optimization model predictive control method.
49038 该方法利用在线支持向量机建立被控对象的非线性模型,在线支持向量机是一种迭代学习的支持向量机训练算法,可以进行在线训练,从而实现模型在线自校正;并且通过遗传算法求解目标函数的最优控制量,完成滚动优化。 The method using the online support vector machine (SVM) to establish the nonlinear model of controlled object, online support vector machine (SVM) is a kind of support vector machine training algorithm of iterative learning, can undertake online training, so as to realize online self-tuning model;And through the genetic algorithm to solve the objective function of optimal control, finish rolling optimization.
49039 对非线性系统的仿真研究结果表明,该方法有效且具有良好的自适性。 Of the nonlinear system simulation research results show that this method is effective and has good adaptive.
49040 在弹载合成孔径雷达(synthetic aperture radar,SAR)下降段成像中,由于弹体存在较大的俯冲下降速度和加速度,回波信号的二维频谱表示式难以有效获得,给后续成像处理带来困难。 In on-board, synthetic aperture radar (synthetic aperture radar, SAR) decline period of imaging, due to the subduction of projectile is falling speed and acceleration, the expressions of the two-dimensional spectrum of the echo signal is difficult to effectively get, for subsequent imaging processing is difficult.
49041 针对该问题,提出了一种基于双曲线性修正斜距模型的弹载SAR成像方法,通过构造双曲函数形式的斜距表示式并引入线性修正因子,对弹载SAR斜距历程进行合理近似;并以修正后的斜距式为基础,利用驻相点原理(principle of stationary phase,POSP)直接求解SAR回波信号的二维频谱;随后根据该频谱表示式设计有效的弹载SAR频域成像算法。 According to the problem, this paper proposes a model based on hyperbolic linear correction slant distance of on-board, SAR imaging method, by constructing the expressions of the slant distance of the hyperbolic function form and introduce linear correction factor, rational approximation of onboard SAR slant distance course;And on the basis of the adjusted slant distance type, using the point in phase principle, principle of stationary phase, POSP) directly to solve the SAR echo signal of two-dimensional spectrum;Then according to the spectrum design effective onboard SAR frequency domain imaging algorithm.
49042 该方法下的频谱推导较为简洁,所获得频谱的数学表达式清晰直观,利于成像分析和后续处理。 Spectrum is derived under the method is relatively simple, the mathematical expressions of the frequency spectrum clearly intuitive and imaging analysis and subsequent processing.
49043 最后的点目标成像仿真验证了该方法的有效性。 The last point target imaging simulation verify the effectiveness of the proposed method.
49044 针对航空发动机关键部件的性能衰退难以定量计算的问题,提出一种部件性能衰退值的计算方法。 Key components for aeroengine performance decline difficult problems to quantitative calculation, puts forward the calculation method of a kind of component performance decline in value.
49045 对表征部件的性能参数进行敏感性分析,筛选出对测量参数最敏感的性能参数定义为部件健康因子。 To characterize the performance parameters of sensitivity analysis, screening on performance parameters of the measurement parameters of the most sensitive health factor is defined as the parts.