Mechanical and Aerospace Engineering


Real-time control strategies for manufacturing based on open-architecture systems and precise CAD geometry

By: Jyothirmai Srinathu

Advisor: Professor Rida Farouki

Three inter-related methodologies are developed to improve the accuracy and efficiency of manufacturing operations by exploiting exact CAD geometry to drive CNC machines through open-architecture controllers. The first is based on a real-time interpolator algorithm for the offset curve trimming and filling operations required to ensure continuous, gouge-free toolpaths in the machining of strongly-curved part shapes. Using the exact part shape to perform real-time tool radius compensation eliminates the need to rely on voluminous G code part programs that must be regenerated to accommodate a change of tool radius. The second project develops a feedrate modulation strategy to ensure accurate traversal of tangent discontinuities in trimmed offset paths, and to balance the competing effects of chip load variations and tool acceleration rates. Finally, the possibility of suppressing chip load variations by real-time modulation of spindle speeds at a constant tool feedrate is investigated, and the DC motor regulation required to achieve this spindle speed modulation is analyzed.

Date(s) - 06/25/2018
10:00 am - 11:15 am

2130 Bainer - MAE Conference Room

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