Linear and impulse control systems for plasma unstable vertical position in elongated tokamak

2012 ◽  
Author(s):  
Yuri V. Mitrishkin ◽  
Semyon M. Zenckov ◽  
Nikolai M. Kartsev ◽  
Alexander A. Efremov ◽  
Vladimir N. Dokuka ◽  
...  
Keyword(s):  
Control Systems ◽  
Impulse Control ◽  
Vertical Position

scholarly journals Assessment of Hygienic Practices in Beef Cattle Slaughterhouses and Retail Shops in Bishoftu, Ethiopia: Implications for Public Health

2021 ◽  
Vol 18 (5) ◽  
pp. 2729
Author(s):  
Fanta D. Gutema ◽  
Getahun E. Agga ◽  
Reta D. Abdi ◽  
Alemnesh Jufare ◽  
Luc Duchateau ◽  
...  
Keyword(s):  
Control Systems ◽  
Hot Water ◽  
Cold Chain ◽  
Vertical Position ◽  
Good Practices ◽  
Face To Face ◽  
The Public ◽  
Plastic Bags ◽  
Cleaning Equipment ◽  
Trained Staff

Understanding the potential drivers of microbial meat contamination along the entire meat supply chain is needed to identify targets for interventions to reduce the number of meatborne bacterial outbreaks. We assessed the hygienic practices in cattle slaughterhouses (28 employees) and retail shops (127 employees) through face-to-face interviews and direct personal observations. At the slaughterhouses, stunning, de-hiding and evisceration in vertical position, carcass washing and separate storage of offal were the identified good practices. Lack of hot water baths, absence of a chilling room, infrequent hand washing, insufficiently trained staff and irregular medical check-up were practices that lead to unhygienic handling of carcasses. At the retail shops, cleaning equipment using soap and hot water (81%), storing unsold meat in refrigerators (92%), concrete floors and white painted walls and ceilings were good practices. Adjacently displaying offal and meat (39%), lack of a cold chain, wrapping meat with plastic bags and newspapers, using a plastic or wooden cutting board (57%), infrequent washing of equipment and floors, and inadequately trained employees were practices that could result in unhygienic handling of beef. Our study identified unhygienic practices both at the slaughterhouses and retail shops that can predispose the public to meatborne infections, which could be improved through training and implementation of quality control systems.

scholarly journals Stabilization on Periodic Impulse Control Systems

2021 ◽  
Vol 59 (2) ◽  
pp. 1136-1160
Author(s):  
Shulin Qin ◽  
Gengsheng Wang ◽  
Huaiqiang Yu
Keyword(s):  
Control Systems ◽  
Impulse Control ◽  
Periodic Impulse

scholarly journals Analysis of propulsion units dedicated to test stands for aviation systems

2021 ◽  
Author(s):  
Ksenia Siadkowska ◽  
Błażej Czajka ◽  
Karol Ścisłowski ◽  
Mirosław Wendeker
Keyword(s):  
Power Systems ◽  
Control Systems ◽  
Power Supply ◽  
Exhaust System ◽  
Unmanned Aircraft ◽  
Unmanned Aircraft Systems ◽  
Vertical Position ◽  
Aircraft Systems ◽  
Stationary Test ◽  
And Control

This paper presents an analysis of selected propulsion units dedicated to test stands for unmanned aircraft systems. It focuses on engines suitable for aircraft with a maximum take-off mass up to 150 kg. The study includes an analysis of propulsion units that can be used to power systems on stationary test stands dedicated to advanced research and measurement of prototype aerospace technologies intended for use in rotorcraft. The analysis of propulsion units shows that electric units are a better choice for powering UAV rotorcraft test stands. Their main advantages include the possibility to simplify the construction of the device by eliminating gears and to mount the motor in a vertical position, simpler power supply, cooling and control systems and the lack of an exhaust system. Additional advantages are undoubtedly lower vibration generation, cheaper and easier operation as well as better comfort.

scholarly journals POSITIONAL IMPULSE AND DISCONTINUOUS CONTROLS FOR DIFFERENTIAL INCLUSION

2020 ◽  
Vol 6 (2) ◽  
pp. 68
Author(s):  
Ivan A. Finogenko ◽  
Alexander N. Sesekin
Keyword(s):  
Control Systems ◽  
Differential Inclusion ◽  
Impulse Control ◽  
Discontinuous System ◽  
Control Actions ◽  
Combined Use ◽  
Equivalent Control ◽  
Jump Function ◽  
Sliding Regimes ◽  
The Ideal

Nonlinear control systems presented in the form of differential inclusions with impulse or discontinuous positional controls are investigated. The formalization of the impulse-sliding regime is carried out. In terms of the jump function of the impulse control, the differential inclusion is written for the ideal impulse-sliding regime. The method of equivalent control for differential inclusion with discontinuous positional controls is used to solve the question of the existence of a discontinuous system for which the ideal impulse-sliding regime is the usual sliding regime. The possibility of the combined use of the impulse-sliding and sliding regimes as control actions in those situations when there are not enough control resources for the latter is discussed.

Continuous, saturation, and discontinuous tokamak plasma vertical position control systems

2016 ◽  
Vol 108 ◽  
pp. 35-47 ◽  
Author(s):  
Yuri V. Mitrishkin ◽  
Evgeniia A. Pavlova ◽  
Evgenii A. Kuznetsov ◽  
Kirill I. Gaydamaka
Keyword(s):  
Control Systems ◽  
Position Control ◽  
Tokamak Plasma ◽  
Vertical Position
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