| Machine tooling is one of the key elements in industry. Since most manufactured products are made with machine tools or machines, improving the performance of machine tools produces an amplifying effect on the overall industry. The performance can be improved by increasing the productivity and accuracy of machine tools.; Intelligent/Adaptive control systems were designed and implemented for compensating both the quasi-static inaccuracy and the chatter in turning processes. For the quasi-static inaccuracy, an adaptive control algorithm and a Workpiece-Profile-Tracking System (WPTS) were developed. This WPTS directly measures the deviations from the desired profile of workpieces in process regardless of workpiece geometry. For controlling the chatter, a novel intelligent control system with an adaptive critic algorithm was built. This system was adaptive to the time-varying tool-workpiece dynamics.; Extensive experiments have shown the feasibility of this research in machining inaccuracy control. The quasi-static inaccuracy control can reduce machining time for increasing material removal rate. In addition, the chatter control can reduce avoidable downtime for repairing possible damages on either machines or cutting tools when the chatter fully develops. |
