作者:
JerzyT.Pinderauniv. of waterloo
Dept. of Civil Engng. Solid Mechanics Division Experimental MechanicsWaterloo Ontario Canada N2L 3G1
The paper presents and discusses theoretical bases and methodology of development of two- and three-dimensional analytical and optical isodynes. Atten- tion is given to the theoretical admissibility of the major compo...
详细信息
The paper presents and discusses theoretical bases and methodology of development of two- and three-dimensional analytical and optical isodynes. Atten- tion is given to the theoretical admissibility of the major components of the physical and mathematical models which are taken as the theoretical basis of the isodynes, and of the related analytical and experimental procedures of stress analysis. Efficiency and reliability of the nondestructive isodyne stress analysis are discussed.
<正>This paper describes a dynamic model and cross-coupling control of a mobile robot with four independently steered and driven wheels. The dynamic model incorporates the components of the wheel mechanisms, backlas...
<正>This paper describes a dynamic model and cross-coupling control of a mobile robot with four independently steered and driven wheels. The dynamic model incorporates the components of the wheel mechanisms, backlash effects of the wheel actuators and nonlinear forces produced by the tire-ground interaction. The problem of computationally efficient control of the vehicle is solved using a low-level control loop that cross-couples steering and driving motors and is utilized in conjunction with a kinematics-based trajectory-tracking controller. The results of simulation show significant reduction of the vehicle slip with moderate trajectory-tracking errors.
<正>Charge-density waves(CDW),a coupled modulation of the conduction electron density and crystal lautice,have been reported in a Iarge number of structurally anisotropic compounds.These CDW modulations,which are ...
<正>Charge-density waves(CDW),a coupled modulation of the conduction electron density and crystal lautice,have been reported in a Iarge number of structurally anisotropic compounds.These CDW modulations,which are in general incommensurate with the periodicity of the undistorted lauice,occur in materials encompassing a wide range of chemical and physical properties.However,in spite of lids diversity,
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