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Guan Jiansheng,Kong Xiansong 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.4
Control performance is critical to a control system. To improve the performance of the steam generator level control system, the control system parameters need to be optimized. Traditional parameters tuning methods, such as trial and error and Design of Experiments etc., are usually experience-based, cumbersome and time-consuming. To address the above inefficiencies, in this paper, the simplex-search based Model-Free Optimization (MFO) has been proposed to search for the optimal control system parameters. The optimized parameters will be gained to maximize the system’s control performance. Rather than traditional controller parameter tuning method, this method optimizes the control system by directly using measurements of control performance. An example of the PID parameters tuning for the steam generator level control was illustrated. The efficiency and the effectiveness of the Simplex-search based Model-Free Optimization – based control parameters tuning methodology has been verified through simulation experiments.
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Min Mo,Rouyi Liu,Jiansheng Tang,Youyi Xun,Hongru Guan 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.126 No.-
Herein, active, low-cost, stable, and sustainable amorphous alloy Co-B-P nanobelts (NBs) are synthesizedfor the selective hydrogenation of furfural (FFR) to furfuryl alcohol (FFA) in H2O. The Co-B-P NBs areflower-like bundles of ultrathin nanosheets obtained by reducing Co ions in a layered liquid crystal usingdouble-reducing agents at room temperature. The specific surface area, hydrogen adsorption capacity,surface states, and FFR selective hydrogenation performance of the Co-B-P NB catalyst can be modifiedvia low-temperature plasma treatment. The treatment does not change the amorphous structure ofCo-B-P NBs. In H2O, Co-B-P NBs treated with plasma at an appropriate power and time exhibit 100%FFR conversion and 95.8% FFA selectivity within 80 min at 80 C and 1.2 MPa H2 pressure. Moreover,plasma treatment can be used to regenerate Co-B-P NB catalysts. The catalytic activity of Co-B-P NB catalystscan be restored using plasma treatment when it decreases because of their oxidation after severalhydrogenation cycles.
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