The Study of Three-Dimensional Micro-Motion Feature Extraction of Ballistic Target Based on Netted Radar

2014 ◽  
Vol 530-531 ◽  
pp. 534-539
Author(s):  
Dong Zhang ◽  
Cun Qian Feng ◽  
Ning Ning Tong ◽  
Si San He ◽  
Teng Lei
Keyword(s):  
Feature Extraction ◽  
Three Dimensional ◽  
Motion Feature ◽  
Feature Extraction Method ◽  
Scattering Center ◽  
Motion Features ◽  
Micro Motion ◽  
New Feature ◽  
Motion Characteristics ◽  
Relationship Of

To solve the problem of sliding-type scattering center and the problem of angle limitation of single radar, a kind of method for extracting three-dimensional micro-motion characteristics of ballistic target based on netted radars was proposed. Firstly, A new feature extraction method based on half period delay multiplication was introduced which establishes the relationship of sliding-type scattering center and ideal scattering center, then making use of the expand hough transformation, the parameters of echo signals were extracted. At last, the three-dimensional micro-motion features and the structure features were obtained by solving nonlinear multivariable equation systems which were established by the multi-view of netted radar. Simulation validated the method can get both the high estimating precision and the three-dimensional micro-motion parameters.

scholarly journals Analysis and Research on Radar Gesture Micro-motion Feature Extraction Method

2021 ◽  
Vol 2031 (1) ◽  
pp. 012012
Author(s):  
Yaoyao Dong ◽  
Wei Qu ◽  
Tianhao Gao ◽  
Pengda Wang ◽  
Haohao Jiang
Keyword(s):  
Feature Extraction ◽  
Extraction Method ◽  
Motion Feature ◽  
Feature Extraction Method ◽  
Micro Motion

scholarly journals Micro-Motion Feature Extraction of a Rotating Target Based on Interrupted Transmitting and Receiving Pulse Signal in an Anechoic Chamber

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1028
Author(s):  
Feng Zhao ◽  
Xiaobin Liu ◽  
Zhiming Xu ◽  
Yuan Liu ◽  
Xiaofeng Ai
Keyword(s):  
Feature Extraction ◽  
Coupling Effect ◽  
Pulse Repetition Frequency ◽  
Pulse Signal ◽  
Anechoic Chamber ◽  
Repetition Frequency ◽  
Motion Feature ◽  
Whole Process ◽  
Micro Motion ◽  
Rotating Target

The pulse signal is widely used in micro-motion feature extraction of rapidly rotating targets as its pulse repetition frequency (PRF) can be high. However, when the pulse signal is implemented in a range-limited anechoic chamber for micro-motion feature extraction, the transmitted and reflected pulse signals may be coupled at the receiver. To solve this problem, the interrupted transmitting and receiving (ITR) method is applied to transmit the pulse signal with hundreds of sub-pulses. The target echo can be received when the sub-pulse is not transmitted. Hence, it avoids the coupling effect of transmitted signals and echoes. Then, the whole process of micro-motion feature extraction for rotating target is proposed based on the ITR method. At last, the simulations and experiments verify that the rotating target micro-Doppler can be extracted by the ITR pulse signal.

Optimization Analysis on Gyroscope’s Three Dimensions Complicated Motion and Lash-Force

2014 ◽  
Vol 945-949 ◽  
pp. 581-586
Author(s):  
Wen Li Yang ◽  
Xiang Hui Lu
Keyword(s):  
Nonlinear Differential Equations ◽  
Three Dimensional ◽  
Three Dimensions ◽  
Optimization Analysis ◽  
Motion Equations ◽  
Sliding Motion ◽  
Motion State ◽  
Motion Characteristics ◽  
Force Time ◽  
Relationship Of

The complicated motion of the gyroscope includes the rotation, the precession, the nutation and the sliding motion which are coupled, and it is affected by the lash-force by the whip. Taking the gyroscope which is moving stably as the research subject, according to the motion characteristics of the gyro’s rotation and precession, the gyro is assumed to be the two-force bar, and the coupled relationship of the gyroscope is analyzed quantitatively. The three-dimensional complicated motion in the different categories is analyzed. The nonlinear differential equations in the different categories is derived and linearized by the minor variables method, and then the three-dimensional motion equations on the rotation, precession, nutation and slipping of the gyroscope in the different categories is established. Take the big gym gyroscope as the example, the influence of the force, time and position of the whip on the motion state of the gyroscope is analyzed in detail, and provides the basis for the design of the gyroscope.

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