scholarly journals THE QUALITY INDICATORS AND OPTIMALITY CRITERION AT THE STRUCTURAL-PARAMETRIC SYNTHESIS OF AUTOMATED ELECTRIC DRIVES

2019 ◽  
Vol 11 (2) ◽  
pp. 380-395
Author(s):  
Alexander V. Saushev ◽  
◽  
Elena V. Bova ◽  
Keyword(s):  
Quality Indicators ◽  
Optimality Criterion ◽  
Parametric Synthesis ◽  
Electric Drives

scholarly journals Development and research of selectively invariant electromechanical systems with elastic kinematic units based on the separation of the harmonic disturbance model

Vestnik IGEU ◽  
2021 ◽  
pp. 49-59
Author(s):  
I.A. Tikhomirova ◽  
S.V. Tararykin
Keyword(s):  
Distributed Model ◽  
Synthesis Process ◽  
Parametric Synthesis ◽  
Electromechanical Systems ◽  
Special Effects ◽  
Electric Drives ◽  
Mechanical Part ◽  
Pros And Cons ◽  
Disturbance Model ◽  
Mechanical Elements

Currently there is a big variety of structure solutions of the selective invariant electromechanical systems with different layout schemes of disturbance internal model for electric drives with robust kinematic units. However, methods of structural parametric synthesis for controllers with combined triggering model only were developed selective invariant systems with “robust” kinematic of mechanical part. Consequently, further improvement of the structure variety of systems for special effects of elastic kinematic units of mechanical part is of current interest. It can be performed by including the distributed model of harmonic disturbance into the synthesis process. Structural parametric synthesis is based on the methods of modal control theory, regulators reduction, selective invariant principals, velocity separation in local sub-systems, regulation by coordinates of state and by output, cascade and slaved coordinates regulation, splitting of disturbance model to separate elements in managing contours. Investigation was performed by specified computing experiments with synthesized electromechanical system models. Now, new structure solutions of selective invariant electromechanical systems with elastic mechanical elements are developed. They are created by using the additional separation principle for disturbance model into separate parts and moving them in to the contours of “fast” and “slow” sub-systems. Acquired models of synthesized systems were compared upon the complex of main quality indicators, the comparison was based on the performed computing experiments. The acquired results of complex performance of set requirements demonstrate main pros and cons for each variant of selective invariant electromechanical systems with elastic elements, determine areas of their preferred usage and allow the developers to simplify the solution of structure optimization based on selected schema of compromises.

scholarly journals PROBLEMS OF ANALOG DEVICES CIRCUIT DESIGN BASED ON THE FUNCTIONAL-PARAMETRIC APPROACH

2021 ◽  
pp. 75-88
Author(s):  
G.B. Digo ◽  
◽  
N.B. Digo ◽  
Keyword(s):  
Circuit Design ◽  
Optimality Criterion ◽  
Random Processes ◽  
External Factors ◽  
Parametric Approach ◽  
Parametric Synthesis ◽  
Lack Of Information ◽  
Search Optimization ◽  
Probabilistic Nature ◽  
Computational Processes

The paper focuses on the problem of circuit design of analog technical devices and systems with due account of random processes of changing their parameters and reliability requirements. A functional-parametric approach is used, based on the computer modeling of the systems functioning and changes in their parameters; methods of optimal parametric synthesis under reliability criteria are used to solve it. The paper also discusses the problems caused by the lack of information about the patterns of ran-dom processes of parameter changes, the absence or lack information about disturbing influences, the effect of external factors on the processes within them. The possibility of applying search optimization algorithms that allow parallelization of computational processes, as well as the possibility of using evolutionary calculations with the probabilistic nature of the optimality criterion, the nonlinearity of the objective function and its restrictions are analyzed.

scholarly journals STRUCTURAL-PARAMETRIC SYNTHESIS OF ROLLING MILLS MULTI-MOTOR ELECTRIC DRIVES

2020 ◽  
Vol 0 (5) ◽  
pp. 25-30
Author(s):  
B. I. Kuznetsov ◽  
T. B. Nikitina ◽  
I. V. Bovdui
Keyword(s):  
Parametric Synthesis ◽  
Rolling Mills ◽  
Electric Drives

Sedation and gender differences in screening colonoscopy - Impact on quality indicators

2011 ◽  
Vol 49 (05) ◽  
Author(s):  
C Bannert ◽  
K Reinhart ◽  
D Dunkler ◽  
M Trauner ◽  
W Weiss ◽  
...  
Keyword(s):  
Gender Differences ◽  
Quality Indicators ◽  
Screening Colonoscopy ◽  
And Gender

MONITORING OF COLONOSCOPY QUALITY INDICATORS REVEALS ADHERENCE TO ESGE GUIDELINE IN AN ACADEMIC ENDOSCOPY FACILITY

2018 ◽  
Author(s):  
K Triantafyllou ◽  
S Karamaroudis ◽  
S Hariklia Vorri ◽  
P Gkolfakis ◽  
V Papadopoulos ◽  
...  
Keyword(s):  
Quality Indicators ◽  
Colonoscopy Quality

Criteria for evaluation of the coordinate measurements quality of parts geometric parameters at pilot-experimental production

2019 ◽  
pp. 3-8
Author(s):  
N.Yu. Bobrovskaya ◽  
M.F. Danilov
Keyword(s):  
Quality Indicators ◽  
Quality Management System ◽  
Technical Specification ◽  
Experimental Production ◽  
Technological Heredity ◽  
Coordinate Measurements ◽  
Reasonable Choice ◽  
The Stability ◽  
Geometric Elements

The criteria of the coordinate measurements quality at pilot-experimental production based on contemporary methods of quality management system and traditional methods of the measurements quality in Metrology are considered. As an additional criterion for quality of measurements, their duration is proposed. Analyzing the problem of assessing the quality of measurements, the authors pay particular attention to the role of technological heredity in the analysis of the sources of uncertainty of coordinate measurements, including not only the process of manufacturing the part, but all stages of the development of design and technological documentation. Along with such criteria as the degree of confidence in the results of measurements; the accuracy, convergence, reproducibility and speed of the results must take into account the correctness of technical specification, and such characteristics of the shape of the geometric elements to be controlled, such as flatness, roundness, cylindrical. It is noted that one of the main methods to reduce the uncertainty of coordinate measurements is to reduce the uncertainty in the initial data and measurement conditions, as well as to increase the stability of the tasks due to the reasonable choice of the basic geometric elements (measuring bases) of the part. A prerequisite for obtaining reliable quality indicators is a quantitative assessment of the conditions and organization of the measurement process. To plan and normalize the time of measurements, the authors propose to use analytical formulas, on the basis of which it is possible to perform quantitative analysis and optimization of quality indicators, including the speed of measurements.

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