Using graphs to construct a math model of a microcontroller-based system for preset rate control of a flywheel motor to be used in high-dynamics spacecraft

2020 ◽  
pp. 126-134
Author(s):  
Vladimir V. NEKRASOV
Keyword(s):  
Real Time ◽  
Rotation Rate ◽  
Control Function ◽  
Real Time Control ◽  
Math Model ◽  
The Real ◽  
Time Control ◽  
Power Matrix ◽  
High Dynamics ◽  
Stated Problem

Developing a microcontroller-based system for controlling the flywheel motor of high-dynamics spacecraft using Russian-made parts and components made it possible to make statement of the problem of searching control function for a preset rotation rate of the flywheel rotor. This paper discusses one of the possible options for mathematical study of the stated problem, namely, application of structural analysis based on graph theory. Within the framework of the stated problem a graph was constructed for generating the new required rate, while in order to consider the stochastic case option the incidence and adjacency matrices were constructed. The stated problem was solved using a power matrix which transforms a set of contiguous matrices of the graph of admissible solution edge sequences, the real-time control function was found. Based on the results of this work, operational trials were run for the developed control function of the flywheel motor rotor rotation rate, a math model was constructed for the real-time control function, and conclusions were drawn about the feasibility of implementing the results of this study. Key words: Control function, graph, incidence matrix, adjacency matrix, power matrix, microcontroller control of the flywheel motor, highly dynamic spacecraft.

PID and PLC units for the real-time control of sewer systems

2002 ◽  
Vol 45 (7) ◽  
pp. 95-104 ◽  
Author(s):  
A. Campisano ◽  
C. Modica
Keyword(s):  
Real Time ◽  
Control Function ◽  
Pid Controllers ◽  
Flow Conditions ◽  
Real Time Control ◽  
The Real ◽  
Time Control ◽  
Plc Control ◽  
Sewer Systems ◽  
Local Water

Moveable gates for the real-time control (RTC) of sewer systems storage capacities are usually operated by controllers which, on the basis of local water level or flow velocity measurements, calculate the regulation errors of the monitored variables, determining the necessary regulator movements to lead the flow conditions to the desired set point. In this paper the results of an investigation on the influence of proportional-integral-derivative (PID) controllers and programmable logic controllers (PLC) for the RTC of moveable sluice gates positioned into sewer systems are presented. The analysis of response time, damping and regulation errors provided information on the PID parameter calibration values and on the PLC control function performances. A comparison between the two kind of controllers has also been carried out.

A new strategy based on feature filtering technique for improving the real-time control performance of myoelectric prostheses

2021 ◽  
Vol 70 ◽  
pp. 102969
Author(s):  
Xiangxin Li ◽  
Lan Tian ◽  
Yue Zheng ◽  
Oluwarotimi Williams Samuel ◽  
Peng Fang ◽  
...  
Keyword(s):  
Real Time ◽  
Control Performance ◽  
Real Time Control ◽  
The Real ◽  
Myoelectric Prostheses ◽  
Time Control ◽  
New Strategy ◽  
Feature Filtering ◽  
Filtering Technique

Feasibility Study on the Real-time Control System of the Pumps for the Reduction of Combined Sewer Overflows

2002 ◽  
Vol 2002 (17) ◽  
pp. 447-463
Author(s):  
T. Sugita ◽  
M. Kurozumi ◽  
H. Ohashi ◽  
H. Mizushima
Keyword(s):  
Control System ◽  
Real Time ◽  
Feasibility Study ◽  
Real Time Control ◽  
Combined Sewer Overflows ◽  
The Real ◽  
Time Control ◽  
Combined Sewer ◽  
Sewer Overflows

New signal processing methods and information technologies for the real time control of JET reactor relevant plasmas

2011 ◽  
Vol 86 (6-8) ◽  
pp. 544-547 ◽  
Author(s):  
A. Murari ◽  
J. Vega ◽  
D. Mazon ◽  
G.A. Rattá ◽  
M.Gelfusa ◽  
...  
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Information Technologies ◽  
Real Time Control ◽  
Processing Methods ◽  
The Real ◽  
Time Control ◽  
Signal Processing Methods

Optimization of the real-time control strategy in petroleum-refining catalyst production wastewater treatment with shortcut nitrification

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86490-86496 ◽  
Author(s):  
Tianqi Ma ◽  
Shaohui Guo ◽  
Zhihui Guo ◽  
Qiushi Zhu ◽  
Jinfu Chen
Keyword(s):  
Wastewater Treatment ◽  
Real Time ◽  
Control Strategy ◽  
Control Parameter ◽  
Petroleum Refining ◽  
Real Time Control ◽  
High Ph ◽  
The Real ◽  
Time Control ◽  
Catalyst Production

Indicated high pH benefits the accuracy of real-time control strategy, explained why DO as a control parameter is unreliable.

The Real-time Control Framework for a Modular Snake Robot

2019 ◽  
Author(s):  
Yunhu Zhou ◽  
Zhiqi Li ◽  
Yuanfei Zhang ◽  
Fenglei Ni ◽  
Yongjun Sun ◽  
...  
Keyword(s):  
Real Time ◽  
Real Time Control ◽  
Snake Robot ◽  
The Real ◽  
Time Control ◽  
Control Framework

Real-Time Pseudodielectric Function of Low-Temperature-Grown GaAs

2000 ◽  
Vol 618 ◽  
Author(s):  
D.A. Gajewski ◽  
J.E. Guyer ◽  
J.J. Kopanski ◽  
J.G. Pellegrino
Keyword(s):  
Low Temperature ◽  
Real Time ◽  
Diffuse Reflectance Spectroscopy ◽  
High Energy ◽  
Real Time Control ◽  
The Real ◽  
Time Control ◽  
Active Feedback ◽  
Low Temperature Grown Gaas ◽  
Lt Gaas

ABSTRACTWe present the real-time pseudodielectric function <ε(E)> of low-temperature-grown GaAs (LT-GaAs) thin films during the growth as a function of growth temperature Tg and thickness. We obtained accurate measurements of the real-time <εc(E)> by using in situspectroscopic ellipsometry (SE) in conjunction with active feedback control of the substrate temperature using diffuse reflectance spectroscopy. We show that for epitaxial LT-GaAs layers, the peak in the imaginary pseudodielectric function <ε2(E)> decreases in amplitude and sharpness systematically with decreasing Tg. We also revealed an abrupt change in <εc(E)> near the critical epitaxial thickness hepi, the value of which decreases with decreasing Tg. Above hepi, the LT-GaAs grows polycrystalline (amorphous) above (below) Tg ∼ 190°C. We also simultaneously monitored the surface roughness and crystallinity by using real-time reflection high-energy electron diffraction (RHEED). These results represent progress in obtaining real-time control over the composition and morphology of LT-GaAs

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