Through all-round energy analysis for the device of azimuth and pitching, the tracking system of azimuth and pitching is studied and the non-linear relations between pitching kinetic and the angle of pitch biaxial is provided.

Azimuth angle and elevation angle of every scatter center can be gained through imaging of three tube echo of high range resolution mono-pulse radar,projection of scatter center on vertical plane of radar antenna axis is gained combined with distance message,then azimuth-elevation 2-D image is evolved.

Since an amplitude-distorted and phase-distorted acoustic-wave arriving at a single vector-hydrophone can still hold the perfect spatial coherence of wavefront,a new algorithm of azimuth and elevation estimation for amplitude-distorted and phase-distorted acoustic-waves is proposed using a subspace technique of low computational complexity,based on an underwater vector-hydrophone.

The coupling dynamics of the pitching of spacecraft, the sloshing of liquid fuel and the vibration of elastic appendages are investigated.

The coupled dynamics of the pitching of a spacecraft,the sloshing of liquid fuel and the vibration of elastic appendages is investigated.

The effects of fuel position on the attitude of spacecraft with elastic appendages were studied under the condition that the fuel sloshes violently and assuming that the coupling system pitches round the mass center of the whole system.