الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Slider crank mechanisms are widely used in many engineering applications as motion transmission systems to convert rotational motion (input) into linear motion (output) or vice versa. Small scale slider crank mechanisms are used in many precise and sophisticated applications, where the accuracy and precision of the mechanisms are considered as one of their main performance requirements. These mechanisms are implemented in many applications such as micro electromechanical systems, biomimetics, measuring instruments, robotics and biomedical tools. The mechanism design parameters (mainly crank and connecting rod center distance length) are the main parameters affecting its characteristics and hence define its field of application. The input-output relations of the mechanism define its characteristics and hence its capabilities to achieve specific application requirements.
In this study, kinematics models for small scale slider-crank mechanism are introduced. The models define the mechanism input-output relations. The mechanism performance parameters, such as; range, sensitivity, accuracy and precision are concluded.
The effect of mechanism manufacturing and assembly deviations such as; components tolerances, joints clearances and assembly deviations were investigated. The investigations are applied for the inline and offset types mechanisms. The tolerance analysis for the mechanism components is a key element for studying and improving mechanism characteristics and its transmission quality. Kinematics based tolerance analysis of the slider crank mechanism (tolerance sensitivity indices) are introduced to elaborate the sensitivity of each component on the system output. The study elaborates the effect of these tolerances and deviation on the mechanism characteristic, position errors and uncertainty.
Contact approach models based on continuous contact mode are developed to predict the mechanism characteristics relations. The models consider the effects of basic design parameters and the revolute joints clearances on the mechanism performance. The resulting mechanisms errors; hysteresis errors, position uncertainty and dead zones were determined. The results of the proposed contact models are compared with those applying Ting’s Law. The results show a good accordance between the proposed model and Ting’s Law. Moreover, the predicted model detects the resultant mechanisms errors. The study is further condensed to define the most appropriate design parameters and manufacturing tolerance according to the permissible system errors.