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To enhance the performance for high-speed tracking control of a piezoelectric tube actuator (PTA), an improved direct inverse rate-dependent PI model is obtained in this paper, and then adopted to design a practical feedforward controller achieving high-speed tracking control for a high-frequency trajectory with strong robustness. Specifically, based on the Prandtl-Ishlinskii (PI) model, an improved...
For nearly all atomic force microscopies (AFMs) utilized now, only the signals in forward scanning process are employed to reconstruct the sample surface topography, while the retraced scanning process is just for adjustment. In this paper, a forward and retraced scanning combined imaging method for AFM is proposed to increase surface reconstruction accuracy. Specifically, two reconstructed topography...
New product promoted in the market is under many risks, and negative word-of-mouth affects the risk seriously. The enterprises often neglect the consumerspsila negative word-of-mouth, and as a result it leads to shrinkage in market. In order to study the negative impact on market risk in new product diffusion, in this paper, the multi-agent and system dynamics models have been established to simulate...
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