Robust high bandwidth oscillation-free digital feedforward compensator for micromachined actuators

Micro & nano letters

article

Shengbo Qi¹  Xinning Wang²  Chong Li³  Robert N. Dean⁵ 

[1]Ocean University of China

[2]Computer Science and Software Engineering, Auburn University

[3]Electrical Engineering, Georgia Institute of Technology

[4]Mechanical Engineering, Auburn University

[5]Electrical and Computer Engineering Department, Auburn University

关键词: digital circuits;    micromachining;    feedforward;    microactuators;    compensation;    robust control;    pipeline digital circuit architecture;    micromachined actuators;    microelectro-mechanical systems applications;    high-quality factors;    phase margin;    feedforward compensator approach;    stability margins;    robust high bandwidth oscillation-free digital feedforward compensator;    oscillation poles;   

DOI  :  10.1049/mnl.2018.5413

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Cholelithiasis is one of the commonest surgical problems and one of the most common gastrointestinal diseases throughout the world but its pathogenesis remains unclear. Many theories have been proposed forward to explain the mechanism of stone formation. It is not fully clear if symptomatic gallstone disease is associated with a specific pattern of some biochemical abnormalities, as lipid profile and fasting blood sugar in serum of patients. This study was designed to estimate lipid profile and fasting blood sugar in the sera of patients with cholelithiasis in comparison with normal individuals (control). In this study, 104(male=16, female=88) were symptomatic gallstone patients (aged 42.79± 12.18 years), and 38(male=6 and female=32) were apparently healthy controls (aged 40.03± 7.47 years). Blood samples were collected from symptomatic gallstones patients before their cholecystectomy operation. Over night fasting, blood samples were collected from all subjects to evaluate serum lipid profile: Total cholesterol (TC), triglyceride (TG), high density lipoprotein-cholesterol (HDL-c), low density lipoprotein-cholesterol (LDL-c), very low density lipoprotein-cholesterol (VLDL-c) and fasting serum glucose (FSG). There was a significant increase (P<0.05) in serum: TC, TG, LDL-c, VLDL-c and FSG of patients with cholelithiasis compared to the apparently healthy controls. The study also showed  that there was a significant decrease (P<0.05) in serum HDL-c in gallstone patients compared to control. In conclusion, cholelithiasis was associated with lipid profile and fasting serum glucose abnormality that be the cause or the effect of gallstone formation. These findings should be taken into consideration while treating gallstone patients.

【 授权许可】

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