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Magnetic shape memory alloys (MSMAs), which are a class of innovative functional materials, are used as the actuators to be applied widely in high-precision positioning. However, the hysteresis nonlinearity in the MSMA seriously affects the precision positioning of the MSMA-based actuator. In this paper, to study the hysteresis nonlinearity in the MSMA, the Krasnosel’skii–Pokrovskii (KP) model is...
Piezoelectric ceramic micro-positioning platform has been widely used in micro-positioning, vibration control, and manufacturing applications as a core component of precision manufacturing equipment. However, the main drawback of the piezoelectric ceramic micro-positioning platform is the inherent hysteresis nonlinearity, which affects the positioning accuracy because of its non-memoryless as well...
A rate-dependent modeling method and a real-time tracking control scheme are designed to eliminate the hysteresis nonlinearity of the piezoelectric micro positioning (PMP) platform. First, we use Duhem model cascaded a transfer function to structure the rate-dependent hysteresis nonlinearity of the PMP platform. Then, based on the established Duhem inverse model and phase compensation for transfer...
In order to describe the inherent hysteresis nonlinearity of the piezo-actuated stages, a Krasnosel'skii-Pokrovskii (KP) model is presented in the paper. The parameters of the KP model are identified by a modified bat optimization algorithm based on Levy fights trajectory. The modified bat optimization algorithm uses the Levy fights trajectory to improve the global searching ability and break away...
Rough dense sol-gel-derived titanium dioxide (TiO2) electron-transport layers (ETLs) and smooth organolead halide perovskite (PVK) films for pseudo-planar heterojunction perovskite solar cells (P-PH PVKSCs) were fabricated by a facile one-step dip-coating method. The highly compact TiO2 ETLs and uniform PVK films endow the device a high power conversion efficiency (PCE) of over 11%, which was nearly...
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