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In this paper, a cloud manufacturing platform, called AMC (Advanced Manufacturing Cloud), is introduced. The AMC provides several manufacturing-related cloud services to facilitate the users to conduct supporting activities for machine tools and offers intelligent devices which can be plugged in various prediction models for performing predictive applications on machine tools. We first describe the...
This paper attempts to detect and predict the preload loss and life time of the ball screw demands in the machine tool industry. Loss of preload leads to a lower natural frequency and the onset of the nonlinear spring characteristics of the ball screw. Such problems result in rapid downtime in the manufacturing process and gradually undetermined positioning errors. In this paper the preload features...
This paper presents the application of an Improved Particle Swarm Optimization (IPSO) technique for adjusting the gains of a PID controller. Two system plants with heavily oscillatory and moderate oscillatory associated with time delay are simulated numerically. A cycloid signal for mimicking the real industrial motion profile is applied. PID control parameters tuned by IPSO and MATLAB toolbox are...
This paper presents a control strategy consisting of a fuzzy cross-coupled linear quadratic regulator (FCCLQR) and a feedforward (FF) compensator to improve the contour accuracy of bi-axis machine tools. The linear quadratic penalty function applied in the proposed controller includes the contour error, the tracking error and the control effort over a finite future time window. The time-varying feedback...
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