Metals, Free Full-Text
Por um escritor misterioso
Descrição
Keeping the level of steel in the mold of the continuous casting process constant is fundamental for the quality of the steel produced and, consequently, its commercial value. It is challenging, considering the several disturbances that cause undesired variations in the mold level. The aim of this paper is to apply a repetitive structure composed of two controllers, a generalized predictive controller (GPC) and a repetitive GPC (R-GPC) with constraints to mitigate the bulging and clogging/unclogging disturbances and the casting speed variation in the mold level of the process. The R-GPC controller has the same characteristics as the GPC, such as performance, robustness to disturbances, and insertion of constraints, and its advantage is the elimination of periodic disturbances. The repetitive structure will be implemented with a robustness filter and tuned by a genetic algorithm (GA). The controller tests are performed by simulations of a nonlinear mathematical model of the mold level, validated using real data from the steel industry. The proposed controller reduces the bulging disturbance amplitude by 98.5% and at 25% of the frequency of reversions in the valve. Consequently, the proposed controller allows an increase in the valve life span, a reduction in maintenance costs, and quality improvement in the steel slab.
G Tec Ddv 3810 Drivers - Colaboratory
Raw Green Amethyst Necklace by Buddha Blossom Jewels
Nonmetal - Wikipedia
Metals and Mining
Metals, Free Full-Text
Regulation of an in vivo metal-exchangeable superoxide dismutase from Propionibacterium shermanii exhibiting activity with different metal cofactors. - Abstract - Europe PMC
SOLUTION: Free electron theory of metals - Studypool
Solved 4. Free energies for the following metals were
Metals, Free Full-Text
RING RESIZING - Gold, Platinum, Silver and most precious metals (FREE refinishing, scratch and ding removal to near new condition)
Sample of OCR Chapter 5 SoW- Metal Lesson
