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The paper generalizes the research actuality and developing trend of rudder at home and abroad, demonstrates steady state fit-itself technique of ram-air pneumatic rudder under vacuum conditions. Aiming at dynamic characteristic of the vacuum air, the paper establishes the control moment equation, puts forward the improving measure. The paper establishes flight speed equation of the missile, pressure...
In this paper, we propose a fully decoupled Three Degree-of-Freedom (DOF) parallel wrist. The theory for type synthesis of fully decoupled parallel mechanism is concluded by reciprocal screw theory, and some symmetrical and asymmetrical 3-DOF parallel wrist is generated by the method. Since the Jacobian matrix of parallel wrist manipulator derived from the kinematics is constant, the mechanism is...
In order to detect traffic sign effectively and quickly, firstly, this paper firstly discriminates the maximum and minimum values of the color-components R, G and B, and then ignores pixels having little color similarity with traffic sign. Secondly, it regards the points of RGB space as color eigenvector and calculates the cosine value of included angle of vectors to discriminate color similarity...
A family of spherical parallel mechanisms which have fully decoupled motions is presented in this paper. The condition required for synthesizing the fully decoupled parallel mechanism is derived from the screw formulation of Jacobian matrix. According to this condition, several novel decoupled spherical parallel mechanisms are obtained. The decoupled motions are validated by the simulation of the...
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