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为计算平台惯性角速度,将跟踪微分器应用到导引头半捷联稳定系统中.介绍了跟踪微分器原理,对基于跟踪微分器的导引头半捷联稳定系统进行了数字仿真和半实物仿真,仿真结果表明导引头半捷联稳定系统的稳定性能随弹体扰动频率升高而降低,典型弹体扰动下半捷联稳定系统的稳定性能满足指标要求. 相似文献
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An attitude controller using the second order sliding mode control methodology with a backstepping approach (SOSMCB) is designed and implemented for a spinning missile with two internal moving mass blocks. The system consists of a rigid body and two radial internal moving mass blocks and its mathematical model is established based on Newtonian mechanics. The control scheme integrates a second order sliding mode control algorithm into the last step of the backstepping approach, and its stability is proved by means of a Lyapunov function. The performance of the controller is demonstrated by numerical simulations, the results show that the attitude controller is stable and effective. 相似文献
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Combining the advantages of partial matched filter(PMF) and fast Fourier transform(FFT),an improved fast acquisition method for GPS C/A code is proposed.According to PMF-FFT acquisition architecture,the greater the number of PMF will bring out the more slowly amplitude decreasing of the amplitude-frequency response,the smaller scale of the corresponding PMF,and the larger computation of the FFT.In order to compensate the frequency spectrum attenuation caused by spectrum leakage and fence effect,adding window function to PMF-FFT is presented.Through comparing the influences to the acquisition performance based on rectangular,Hamming,Blackman and Rife-Vincent(Ⅲ) window functions,an improved Rife-Vincent Ⅲ windowing algorithm is recommended for the fast acquisition based on PMF-FFT. 相似文献
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针对MR/GPS制导火箭弹测量的地磁信号较弱、附加干扰噪声大的特点,运用小波分析的方法,设计了小波滤波器.提出对含脉冲干扰多的信号先采用中值滤波,再采用小波强制滤波的方法.仿真结果表明,该方法算法简单、易于实现.用小波变换处理后的地磁测量信号,与用FFT数字滤波器或数据平滑方法相比,不仅滤波效果更为理想,而且滤波后的信号能量损失很小. 相似文献
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