This paper reduces the non-homogeneous boundary conditions to homogeneous boundary and constructs a Banach space, with the aid of discussing the spectral structure of homogeneous linearized operator, obtains the marginal stability of a spotal balanced solution.

The ACV s course stability was calculated for straig.

To evaluate the relationship between the course stability and the transverse stability of towed ship,the four degree equations of towed ship were used in the towing system dynamics model.

For evaluating the relationship between course stability and transverse stability of the towed ship,the four degree equations of the towed ship is used in the towing system dynamic model.

In order to properly decide transverse grads of runway, this paper researches the directional stability of aircraft that runs on the runway with two transverse slopes.

This paper gives the concept of UAV s static stability and the influences of the relaxed directional static stability on its lateral-directional motion.

In this paper, relaxed directional static stability is studied based on a certain Chinese UAV in order to do some preparative work for high-powered UAV.