Geometric errors directly affect the position of end-effector a Parallel Kinematic Manipulator (PKM), thus reducing its positioning accuracy. However, tasks that are performed by PKMs, such as high-precision machining using kinematic model with nominal values, affected machine not taken into account. Therefore, it is important to make an accurate determination machine’s error factors obtain mod...

Kinematic accuracy reliability is an important performance index in the evaluation of mechanism quality. By using a 3DOF 3-PUU parallel robot manipulator as the research object, the position and orientation error model was derived by mapping the relation between the input and output of the mechanism. Three error sensitivity indexes that evaluate the kinematic accuracy of the parallel robot mani...

This paper presents the results of a comprehensive study on the efficiency of planar parallel mechanisms, considering their kinetostatic performance and also, their workspace. This aim is approached upon proceeding single- and multi-objective optimization procedures. Kinetostatic performances of ten different planar parallel mechanisms are analyzed by resorting to a recent index, kinematic sens...

Models of medusan swimming typically rely on kinematic approximations to observed animal morphology to make such investigations tractable. The effect of these simplifications on the accuracy of predicted dynamics has not been examined in detail. We conduct a case study of the scyphozoan jellyfish Chrysaora fuscescens to isolate and quantify the sensitivity of dynamic models to common kinematic ...