By M.F. Hassan, S.M. Megahed
The overseas convention on Mechanical layout and construction has through the years confirmed itself as a good discussion board for the alternate of rules in those tested fields. the 1st of those meetings used to be held in 1979. The 7th, and latest, convention within the sequence was once held in Cairo in the course of February 15-17, 2000. foreign engineers and scientists amassed to switch stories and spotlight the cutting-edge study within the fields of mechanical layout and creation. moreover a heavy emphasis was once put on the difficulty of know-how move. Over a hundred papers have been permitted for presentation on the convention. present Advances in Mechanical layout & construction VII doesn't, even if, try and submit the whole paintings provided yet as a substitute deals a pattern that represents the standard and breadth of either the paintings and the convention. Ten invited papers and fifty four usual papers were chosen for inclusion in those complaints. They hide a number of simple and utilized issues that may be labeled into six major different types: method Dynamics, sturdy Mechanics, fabric technological know-how, production procedures, layout and Tribology, and commercial Engineering and its functions.
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Additional resources for Current Advances in Mechanical Design and Production VII (Cairo University M D P Conference Current Advances in Mechanical Design and Production)
Sample text
The actuating torques are employed for flexible systems and their response is simulated. m 2, modulus of elasticity multiplied by cross sectional area EA -- 1000 N, no damping is considered, and the revolute joints are assumed perfect. Simulation using consistent mass formulation is performed with 4-elements per link. Figs. a-d)showthe system state at different locations while Figs. a,b) show the path of the end point of each link. It can be seen that lower link stiffness results in degraded performance of a controller based on rigid body dynamics, which can still give acceptable performance, if the links are stiff enough.
L0 where the difference between angular orientation of the link tip of the flexible system and the rigid one is plotted against time. This divergence can be understood since lumping is an approximation of mass distribution in the system, it results in a slightly different response, while consistent mass formulation only ignores the inertia change due to deformation, and thus will simulate the gross motion (rigid body mode) very accurately. 5. Example 2: Two-Link Manipulator A two-link manipulator (Fig.
Here, we present a simplified method for this calculation, which does not involve any division; as a consequence it works in any case. We present also an example of a particular, but non academic, manipulator for which we actually obtain sixteen different real configurations corresponding to a particular given end effector location; this result demonstrates that the degree of the previous polynomial equation cannot be reduced. KEYWORDS Inverse Kinematic Model, Configuration, Location, Generalized Coordinates, Operational Coordinates.