Mechanical pre-design of high performance motion servomechanisms

Abstract High speed and high precision servomechanisms are key elements in the high performance controlled motion systems. Therefore, it is of great importance to consider the limitations of dynamic perfomances during the design of mechanism dedicated to controlled motion axis. An important limitation is due to the interaction between flexible mechanism and feedback controller. This paper aims to include this interaction in the mechanical design. Some design rules are generated with a generic model which includes this interaction. Afterwards, with these new design rules it is possible to determine the bandwidth and the inertial ratio of the mechanism to meet the controlled motion requirements (e.g., speed and precision). With these rules and some other classical rules, an attempt to raise the selection of design solutions has been set within the context of the ball screw drive system for high speed machine tools (e.g., kinematics, components and sensor location choices).

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