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Cam follower mechanisms are versatile mechanisms for obtaining complex motion outputs. Cams are also having vast range of applications due to their flexibility in operations, as they may easily be replaced, are adjustable and changeable for timing or for different motion requirements. The kinematic behavior of follower establishes the basic suitability of cam for the given application. The cam profile curves are mainly responsible, at the core, for proper operation of the cam follower mechanism, as they are the main input of the cam follower system. Synthetic curves, which are generated, parametrically, through a set of known data points with desired number of curve segments, may be proved to be a major improvement over the traditional trigonometric and polynomial cam profile curves. In present work Hermite and Bèzier curves are studied for their effect on the kinematic behavior of follower, when used as cam profile curves. Both the curves are generated by varying their different curve parameters, viz. length and direction of tangent vector for Hermite curves, and number of control points with their different positions for Bèzier curves. The kinematic behavior of follower is simulated for cam profiles using these synthetic curves in MATLAB. The resulting follower displacements, velocities, accelerations and jerks are analyzed and comparative study is performed with the kinematic behavior of cycloidal cam profile. It is observed that the Hermite curve, when used as a cam profile, has caused 28.32% improved (i.e. reduced) maximum acceleration of follower than that obtained for cycloidal curve, while deviating from cycloidal cam profile by a maximum instantaneous difference in displacement of follower by 4.95 %. At the same time Bèzier curve has facilitated continuous jerk of follower, which is not, at all, possible by using a cycloidal curve. Thus, it is finally concluded that the synthetic curves, when used as cam profile, are providing better kinematic behaviour of cam follower mechanism, with lower maximum velocities, lower maximum accelerations, and lower maximum values of other undesirable higher order kinematic characteristic terms with the flexibility of shape control and better support for CAD/CAM applications. This Ebook is a master's dissertation on 'Cam Profile Analysis and Simulation using Synthetic Curves' submitted in September, 2013.
Packed with hundreds of detailed illustrations! THE DEFINITIVE GUIDE TO CAM TECHNOLOGY! The transformation of a simple motion, such as rotation, into linear or other motion is accomplished by means of a cam -- two moving elements mounted on a fixed frame. Cam devices are versatile -- almost any specified motion can be obtained. If you work with industrial applications where precision is essential, the "Cam Design Handbook" is a key resource you'll need handy at all times. You'll find thorough, detailed coverage of cams in industrial machinery, automotive optimization, and gadgets and inventions. Written with tremendous practical insight by engineering experts, the "Cam Design Handbook" gathers the information you need to understand cam manufacture and design. Comprehensive in scope and authoritative in nature, the book delivers a firm grasp of: * The advantages of cams compared to other motion devices * Computer-aided design and manufacturing techniques * Numerical controls for manufacturing * Cam size and profile determination * Dynamics of high-speed systems Get comprehensive coverage of: * Basic curves * Profile geometry * Stresses and accuracy * Camwear life predictions * Cam system dynamics * And more!
This volume contains the Proceedings of the 13th International Conference on Image Analysis and Processing (ICIAP 2005), held in Cagliari, Italy, at the conference centre “Centro della Cultura e dei Congressi”, on September 6–8, 2005. ICIAP 2005 was the thirteenth edition of a series of conferences organized every two years by the Italian group of researchersa?liated to the International Association for Pattern Recognition (GIRPR) with the aim to bring together researchers in image processing and pattern recognition from around the world. As for the previous editions, conference topics concerned the theory of image analysis and processing and its classical and Internet-driven applications. The central theme of ICIAP 2005 was “Pattern Recognition in the Internet and Mobile Communications Era”. The interest for such a theme was con?rmed by the large number of papers dealing with it, the special session devoted to pattern recognition for computer network security, and the emphasis of two invited talks on Internet and mobile communication issues. ICIAP 2005 received 217 paper submissions. Fifteen papers were collected into the two special sessions dealing with Pattern Recognition for Computer Network Security and Computer Vision for Augmented Reality and Augmented Environments.