EXTERNAL ENVIRONMENT MODEL IN PROCESS OF MONITORING TECHNICAL CONDITION OF COMPLEX OBJECTS

2021 ◽  
Vol 3 (10) ◽  
pp. 135-140
Author(s):  
A. B. Zhernakov ◽  
Keyword(s):  
Dynamic Model ◽  
Influencing Factors ◽  
External Environment ◽  
Technical Condition ◽  
Complex Objects ◽  
Unlimited Number ◽  
Environment Model

The article proposes a dynamic model of the external environment for an unlimited number of influencing factors based on the interpolation of a table function. The results of simulation of the process of movement of the observed object under the influence of factors dependent on its coordinates and time of observation are considered.

Investigation of the interaction of car wheels with the stand rollers during braking

2021 ◽  
Vol 13 (1) ◽  
pp. 68-77
Author(s):  
Igor Мarmut ◽  
◽  
Andriy Kashkanov ◽  
Vitaliy Kashkanov ◽  
◽  
...  
Keyword(s):  
Traffic Safety ◽  
Technical Condition ◽  
The Body ◽  
Power Model ◽  
Equilibrium Equations ◽  
Design Features ◽  
Complex Objects ◽  
Passenger Cars ◽  
Wheel Drive ◽  
Four Wheel Drive

The article discusses the issues of modeling conditions for obtaining diagnostic information about complex objects. As an example, the study of the braking qualities of four-wheel drive cars on an inertial roller stand is considered. Diagnosing the technical condition of cars from the point of view of traffic safety is one of the most important problems. This is especially important for systems whose technical condition affects traffic safety: especially braking systems. Foreign and domestic experience testifies to the effectiveness of instrumental control. The diagnostic equipment includes roller stands, on which you can check the braking properties of cars. As shown by many studies, in particular, carried out at the Department of Technical Operation and Service of Automobiles, KhNADU (HADI), inertial stands provide more reliable information about the technical condition of the car. Such stands allow you to reproduce the real speed and thermal modes of the brakes (especially those equipped with ABS). To improve the accuracy of diagnosing a car on a roller stand, it is necessary to have an idea of the nature of the interaction of the car wheels with the rollers. The studies of wheel rolling on the stand rollers have been carried out by many authors since the 80s of the last century. However, all these studies were carried out on uniaxial stands and for mono-drive vehicles. Nowadays, a large number of passenger cars have four-wheel drive. Rolling of the wheels of such cars on rollers and their interaction has practically not been studied. Therefore, a return to the study of this issue is relevant. A power model of the system of interaction between the car and the stand has been developed, taking into account the design features of the stand and the design features of the car's suspension. The power model of the system under consideration contains the equilibrium equations of the body and two bridges and the equations of motion of the rollers and wheels of the car. Based on the results of the analysis of the acting forces in the "car-stand" system, the braking moments on the wheels M and the coefficients of the use of the load q during the braking tests of a 4x4 vehicle were determined. The obtained research results allowed to improve the theory of interaction of a car wheel with the rollers of an inertial diagnostic stand.

scholarly journals Research on the influencing factors of family firm innovation

2021 ◽  
Vol 235 ◽  
pp. 02017
Author(s):  
Yingrui Liu
Keyword(s):  
Influencing Factors ◽  
Family Involvement ◽  
Family Business ◽  
External Environment ◽  
Family Firm ◽  
Economic Activities ◽  
Firm Innovation ◽  
Strategic Focus ◽  
The Stability ◽  
Innovation Behavior

Family business plays an important role in the world’s economic activities, and has made great contributions to the stability and development of the economy of various countries. Innovation is an important but inexplicable part of the strategic focus of family business. Based on the existing literature, this paper discusses the factors that influence the innovation behavior of enterprises from the perspective of family involvement and external environment.

scholarly journals Vibration analysis of multi-body dynamic model of combat vehicle gearbox

2019 ◽  
Vol 287 ◽  
pp. 03005
Author(s):  
Jan Furch ◽  
Cao Vu Tran
Keyword(s):  
Dynamic Model ◽  
Vibration Signal ◽  
Technical Condition ◽  
Proposed Model ◽  
Combat Vehicle ◽  
Failure Conditions ◽  
The Individual ◽  
Multi Body ◽  
Material Wear ◽  
Body Dynamic

The combat vehicle gearbox, during the operation, generates vibration signals being related to the technical condition of gearbox. The analysis of the vibration signal could be used to determine accurately the behaviour of gearbox. Along with the development of the computer technology, the multi-body dynamic solution has been used widely to simulate, analyse, and determine the technical condition of gearbox. The purpose of this paper is to introduce the dynamic model of combat vehicle gearbox, and the simulation process based on the multi-body dynamic software, namely MSC.ADAMS. This proposed model allows the detection of failure conditions of individual gears and bearings in the gearbox. In this way, the fault conditions of the individual transmission components are identified. In the future, we would like to include a material wear module in the model, and we would like to model the life of the gearbox. We assume that we would also carry out accelerated tests of the gearbox to verify validity.

Study and Realization of a Prototype Octocopter System with PID Controller

2018 ◽  
Vol 10 (4) ◽  
Author(s):  
Saidi Hemza ◽  
Djebri Boualem
Keyword(s):  
Dynamic Model ◽  
Pid Controller ◽  
External Environment ◽  
Lagrangian Model ◽  
System Dynamic Model ◽  
Proportional Integral Derivative ◽  
Proportional Integral Derivative Controller ◽  
Proportional Integral ◽  
Euler Model ◽  
Electrical Components

In this work, the mechanical and electrical components are designed and realised for an octocopter. The designed system dynamic model is supported with Euler-Lagrangian model and Newton-Euler model respectively for the rotational and transnational movements of the drone. The prototype octocopter is also equipped with a proportional integral derivative controller to feedback both location and respond to the external environment.

Toothed Gear Dynamic Model as a Tool for Assist Diagnosis its Technical Condition

2015 ◽  
Vol 236 ◽  
pp. 228-235
Author(s):  
Grzegorz Peruń
Keyword(s):  
Dynamic Model ◽  
Signal Analysis ◽  
Technical Condition ◽  
Test Stand ◽  
Early Stages ◽  
Dynamic Phenomena

This article presents the results obtained with use of author's dynamic model of gears working on power circulating test stand. It was assumed, that properly defined and next identified model can be used to analyze dynamic phenomena in meshing and bearings of gears.The article includes results of simulations of gear with chipped tooth and with partial crack of the pinion. Results of analysis shown, that the occurrence of meshing deviations, makes the detection of damages in the early stages of their growth difficult and the detection may be not possible without using methods of advanced signal analysis.

Formalization of the External Environment Uncertainty in the Power Equipment Operating

2019 ◽  
Vol 20 (7) ◽  
pp. 405-411
Author(s):  
I. A. Shcherbatov
Keyword(s):  
External Environment ◽  
Technical Condition ◽  
The State ◽  
Operating Conditions ◽  
Design Stage ◽  
Economic Damage ◽  
Mathematical Tool ◽  
Power Equipment ◽  
Different Types ◽  
State Of The Environment

Operating conditions of the power facilities equipment have an impact on its technical condition. These conditions are determined by the state of the external (environment) environment. Deviations of environmental parameters from the required (normative) values can accelerate negative trends leading to failures, accidents and, accordingly, economic damage from downtime and restoration of the proper technical condition of power equipment. Therefore, taking into account the state of the environment is an important aspect of solving the problems of monitoring, diagnosis and forecasting of technical condition, as well as solving the problems of management and decision support in the operation of energy facilities. The external environment is characterized by different types of uncertainty. The different uncertainties of the external environment determine the need to choose or correct the way to achieve the goal of management or decision-making. Therefore, the paper proposes a formalized description of the environment state, which has uncertainties of different types. Synthesized operations to obtain states different from the" typical " obtained, for example, at the design stage of the diagnostic system or control of power equipment. On the basis of this implemented a method of rapid assessment of the external environment without a survey of experts based on the synthesis of the accelerated procedure. The choice of fuzzy set theory is justified as a mathematical tool for formalizing uncertainties of different types and subjectivism inherent in the opinions of domain experts. The concept of the environment state is formalized and typical operations for determining its typical states are proposed. To take into account the different types of uncertainty in the description of the current state of the environment, a modifier mechanism is proposed. Modifiers can significantly simplify calculations in the formalization of environmental conditions for use in diagnostic systems and control of power equipment. The considered computational examples show the main features of the proposed approach. The results of the application of the developed approach suggest the feasibility of its application to solve the problem of formalization of the environment in the operation of power equipment under uncertainty.

A STUDY ON THE FACTORS THAT INFLUENCE THE FITNESS BETWEEN TECHNOLOGY STRATEGY AND CORPORATE STRATEGY

2008 ◽  
Vol 05 (01) ◽  
pp. 81-103 ◽  
Author(s):  
JIN CHEN ◽  
YU-BING HE ◽  
XIN JIN
Keyword(s):  
Financial Performance ◽  
Competitive Advantage ◽  
Empirical Research ◽  
Influencing Factors ◽  
Product Innovation ◽  
Corporate Strategy ◽  
External Environment ◽  
Technology Strategy ◽  
Future Expectations

Facilitating the company's competitive advantage building as well as enhancing its financial performance, the fitness between one company's technology strategy and its corporate strategy plays a significant role of ensuring the deployment of the company's technological capability and technological resources. In order to analyze the factors which influence the fitness between a company's technological capabilities and its corporate strategy, this study introduces four factors based on the former relevant studies. They are the external environment, top management, firm's technological resources and the organizational convergence ability. Moreover, this study has creatively utilized technology attitude, product innovation and process innovation as three indicators to measure the studying object: the fitness between a company's technology strategy and corporate strategy. After empirical research, a model is constructed, with all the detailed influencing factors and their functional mechanism included. Finally, the limitations and future expectations are discussed.

A Dynamic Model of Employees’ Transition to Entrepreneur: A Cognitive Mapping Approach

2021 ◽  
pp. 153448432110002
Author(s):  
Jin Lee
Keyword(s):  
Dynamic Model ◽  
Influencing Factors ◽  
Cognitive Mapping ◽  
Driving Forces ◽  
Empirical Studies ◽  
Pull Factors ◽  
Factors Affecting ◽  
Push And Pull Factors ◽  
Mapping Approach ◽  
Push And Pull

Employees’ transition to an entrepreneurial career has been explained by two major driving forces: push and pull factors. The push-pull dichotomy, however, has been the center of debate on whether the classification is incomplete and ambiguous. Until this debate is resolved, the dynamic and fluid nature of the influencing factors and their relationships remains unclear. The purpose of this research is to discuss the legitimacy of the push-pull dichotomy in explaining the motivations and processes of employees’ transition to an entrepreneurial career. To achieve this, a cognitive mapping approach to synthesize the factors from the extant empirical studies was employed. Analysis of 26 articles revealed that categories of push and pull factors in prior research are neither mutually exclusive nor clearly separate. Our dynamic model of employees’ transition to an entrepreneurial career illustrates the reciprocal, compounding, and counter-effective influence of factors. This research sheds light on the dynamic interrelationship among factors affecting employees’ transition to an entrepreneurial career.

scholarly journals Effect of bearing thermally induced preload on the efficiency of automotive manual transmission under RDE

2019 ◽  
Vol 233 (21-22) ◽  
pp. 7423-7441 ◽  
Author(s):  
A Laderou ◽  
M Mohammadpour ◽  
S Theodossiades ◽  
A Wilson ◽  
R Daubney
Keyword(s):  
Dynamic Model ◽  
Influencing Factors ◽  
Relevant Literature ◽  
Transmission Efficiency ◽  
Operating Conditions ◽  
Manual Transmission ◽  
Effect Of Temperature ◽  
System Perspective ◽  
Total Transmission ◽  
Frictional Losses

In order to calculate the efficiency of an automotive manual transmission, taking into consideration the effect of its most power consuming components – gears and bearings – as well as the interactions between them is of high importance. In this paper, a dynamic model has been developed which can predict the frictional losses of a complete gearbox as a system and, thus, its efficiency. The effect of temperature on bearing preload is also considered and taken into account from a system perspective identifying its effect on the bearings frictional losses (as well as the overall efficiency). The operating conditions used are snapshots of the Real Driving Emissions driving cycle, which is a standard metric for automotive manufacturers. Results show that doubling the temperature can lead to 120% increase of the bearing losses and up to 140% increase of the total transmission losses. The effect of the variation of operating conditions (velocity and torque) is also taken into account. The novelty of this paper lays in the development of a dynamic model which takes into account the performance of a complete gearbox under transient operating conditions, as well as the interaction among its main components and the ability to make changes on the influencing factors of transmission efficiency so that their effect on the complete gearbox efficiency can be tracked. This has not been yet reported in the relevant literature which mainly focuses on the influencing factors of transmission power loss and efficiency experimental measurements under various operating conditions for gear pairs instead of complete gearboxes.

Innovation ability of industry-university-research cooperation and innovation considering split-combined quadratic big data dynamic model construction

2020 ◽  
pp. 002072092092965
Author(s):  
Yan Qing ◽  
Wang Qi
Keyword(s):  
Dynamic Model ◽  
Influencing Factors ◽  
Innovation Process ◽  
University Research ◽  
Three Dimensions ◽  
Research Knowledge ◽  
Core Competitiveness ◽  
Research Cooperation ◽  
Innovation Ability ◽  
The Difference

The innovation of industry, university and research cooperation innovation ability can increase the core competitiveness of enterprises, promote the further implementation, promote the cooperation and innovation ability of university enterprises, and enhance the comprehensive strength of the country. This study analyzes the knowledge transformation law revealed by the three exploratory cases from the three dimensions of knowledge coding, abstraction and diffusion, and proposes the knowledge space (K space) analysis framework of industry-university-research cooperation, and based on knowledge in K the difference in spatial position divides the knowledge form. The ability to acquire knowledge in four stages of industry-university-research cooperation innovation process positively influences the production, study and research knowledge to create performance, and helps propensity score matching method, build Industry-university-research cooperation innovation ability, enhances split-merger quadratic dynamic model, analyzes the influencing factors of knowledge innovation ability enhancement in industry-university-research cooperation, and supports the dynamic scalability of industry-university-research cooperation topology and the underlying transmission mechanism for industry-university-research cooperation innovation data. The dynamic mapping strategy between the operation node and the operation node was designed and improved. The key influencing factors of the knowledge digestion process, the key influencing factors of the knowledge sharing process and the key influencing factors of the knowledge proliferation process were verified based on the dynamic model. Industry, university and research cooperation innovation ability provides countermeasures.

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