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[IEEE 2018 15th International Conference on Control, Automation, Robotics and Vision (ICARCV) - Singapore, Singapore (2018.11.18-2018.11.21)] 2018 15th International Conference on Control, Automation, Robotics and Vision (ICARCV) - Detection and Compensation of Motion Error for Nanomanipulation Platform in Scanning Electron Microscope
摘要： Nanomanipulation system based on scanning electron microscope(SEM) with good real-time visual feedback and nanoscale observation resolution had high operability in a vacuum working environment. Different nanomanipulation tasks of carbon nanotubes (CNTs) are carried out through the nanomanipulation system in SEM. Nanomanipulation platform existed inherent manufacture errors, installation errors and other errors, and imprecise nanomanipulation system were also time-consuming and laborious for operators. This paper presentes a method of combining the visual feedback and feedforward control to detect and compensate the motion error of the multi-dimensional SmarAct nanomanipulation platform in the nanomanipulation system in SEM. This method reduces the motion error in the X-Y direction and achieved higher operating accuracy. At the different step speed, the motion error in the X direction and Y direction is 135.7nm and 112.9nm respectively. After the feedforward compensation, the motion error in the X direction and Y direction reduces to 61.3nm and 54.1nm respectively.
关键词： feedforward control,Scanning Electron Microscope (SEM),visual feedback,nanomanipulation
更新于2025-09-23 15:23:52
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A Voltage-Balancer-Based Cascaded DCa??DC Converter With a Novel Power Feedforward Control for the Medium-Voltage DC Grid Interface of Photovoltaic Systems
摘要： DC–DC converters with output-series cascaded submodules (SMs) are required for the medium-voltage direct current (MVDC) grid interface of photovoltaic (PV) systems. However, the mis-matched power of PV arrays can cause an imbalance among the output voltages of SMs. In order to address this problem, in this paper, a multi-port cascaded DC–DC converter is established on the basis of a voltage balancer (VB) with a novel power feedforward voltage-balancing control strategy. The converter has multiple input terminals for the PV arrays and an output terminal connected to the MVDC grid. The differential power is regulated from one SM to another through the VB, ensuring that the SM output voltages are equalized. Simulation and experimental results suggest that the proposed converter has an excellent voltage-balancing capacity and dynamic performance.
关键词： Photovoltaic,voltage balancing,power mismatch,MVDC,power feedforward control
更新于2025-09-19 17:13:59