An Inter-Disciplinary Approach to the Development of a Low-Consumption Prototype for the European Shell Eco-Marathon

2014 ◽  
Vol 875-877 ◽  
pp. 977-982
Author(s):  
Teresa Donateo ◽  
Fabio Ingrosso ◽  
Angelo Nicolì ◽  
Andrea Taurino
Keyword(s):  
High Efficiency ◽  
Test Phase ◽  
Power Train ◽  
Vehicle Shape ◽  
Definition Of ◽  
And Control ◽  
Low Consumption

The paper describes the design, the test and the optimization of a prototype for the European Shell Eco-Marathon (SEM) competition. The design step includes the definition of vehicle shape, materials, structure, tires, power-train and control with an inter-disciplinary approach. The test phase was performed both numerically and experimentally. The vehicle, named Carla 2012 has been build at the DII (Department of Innovation Engineering) at Università Del Salento and tested on the facilities available at the Nardò Technical Center and was able to satisfy all the specifics of SEM regulation in 2012 edition. The optimization step is aimed at defining an innovative powertrain and an high-efficiency race strategy in order to achieve 3000 km with the equivalent of 1 liter of gasoline.

scholarly journals ECONOMIC ESSENCE AND SIGNS OF MARKETING MANAGEMENT

2021 ◽  
pp. 56-63
Author(s):  
Nataliia Stebliuk ◽  
Yuri Gubsky
Keyword(s):  
High Efficiency ◽  
Economic Transformation ◽  
Marketing Management ◽  
Practical Implementation ◽  
Management Concepts ◽  
Modern Business ◽  
Business Conditions ◽  
Definition Of ◽  
And Control ◽  
Conceptual Foundations

The article is devoted to theoretical aspects of marketing management of enterprise as a scientific category through comprehensive study of marketing management conceptual foundations, adapted to modern business conditions. The features of theoretical and practical principles of formation and development of marketing concepts are given due to scientific and technological progress and informatization of society. Theoretical aspects of concepts of marketing management and its application in the activities of enterprises and organizations are highlighted. The development of marketing management concepts will allow forming a set of interrelated methodological approaches to practical implementation of specific provisions, in accordance with modern conditions and trends in the development of economic entities during economic transformation. It is proved that the question of definition and terminology is very important for any theory, because definitions, terms, provisions at the heart of any reasoning and logical constructions can affect their final result. Generalization of scientific provisions allowed providing a definition of "marketing management". Marketing management is a type of activity that involves enterprise analysis, planning, implementation and control carried out by all its units in the interaction and coordination of interests on the basis and principles of marketing to achieve high efficiency, development and consolidation in a competitive environment that allow to achieve set goals. These goals are to increase profits, meet the needs of the target audience, increase market share, etc. It is emphasized that the introduction and use of marketing mechanisms in integration with management allow to make decisions based on the comparison of real opportunities with market demands, desired values and aspirations of existing and potential consumers. Marketing management as a purposeful activity to regulate company's position in the market through planning, organization, motivation and control, taking into account specific conditions, aims to achieve the company with a clear focus on the consumer. The obtained results make it possible to identify the main trends in the development of marketing management with the use of specific technologies in management system of enterprises and organizations.

scholarly journals Selection of the optimal flow path and control program for the turbo drive of remotely operated underwater vehicle

2021 ◽  
pp. 90-97
Author(s):  
Р.Р. Симашов ◽  
С.В. Чехранов
Keyword(s):  
High Efficiency ◽  
Initial Temperature ◽  
Control Program ◽  
Underwater Vehicle ◽  
Flow Path ◽  
Control Programs ◽  
Load Schedule ◽  
And Control ◽  
Multi Mode ◽  
Low Consumption

Обеспечение высокой экономичности не только на режимах номинальной мощности, но и на частичных режимах при изменении внешних параметров приводит к необходимости оптимизации проточной части турбины с объективным учетом ее характеристик на переменных режимах. Приводятся результаты многорежимной оптимизации МРТ в составе ЭУ АНПА на базе подхода разработанного авторами. Представлены основные результаты сравнительного анализа многорежимной оптимизации МРТ с оптимизацией на i-тый режим и работающей на остальных режимах как переменных для различных программ регулирования мощности. Выявлено сильное влияние на результаты многорежимной оптимизации основного ограничения в виде равенства мощности турбины мощности задаваемой графиком нагрузки, а также программ регулирования. Возможность применения соплового регулирования приводит к ослаблению степени воздействия основного ограничения. Установлено, что оптимальные геометрические характеристики стремятся к режиму с большей работой. Представлены результаты многорежимной оптимизации МРТ для различных программ регулирования и графиков нагрузок по отношению к результатам многорежимной оптимизации с программой реализующей сопловое регулирование в сочетании с изменением начальных параметров перед турбиной. Многорежимная оптимизация для программы, реализующей сопловое регулирование в сочетании с изменением только начальной температуры перед турбиной, выявила узкую регулировочную способность начальной температуры, и невозможность в некоторых случаях удовлетворения основным ограничениям по равенству мощностей для всех исследуемых графиков нагрузки в пределах заданных ограничений на режимные параметры. Результаты численного эксперимента свидетельствуют, что разработанный автором подход к многорежимной оптимизации МРТ позволяет снизить расход топлива при условии обеспечения заданного графика нагрузок по сравнению с традиционными методами проектирования на номинальный режим. Ensuring high efficiency not only at nominal power modes, but also at partial modes when changing external parameters leads to the need to optimize the flow path of the turbine with objective consideration of its characteristics at variable modes. The results of multi-mode optimization of a low-consumption turbine as part of a power unit of remotely operated underwater vehicle based on the approach developed by the authors are presented. The main results of a comparative analysis of multi-mode optimization of a low-consumption turbine with optimization for the i-mode and operating in other modes as variables for various power control programs are presented. A strong influence on the results of multi-mode optimization of the main limitation in the form of equality of the turbine power to the power set by the load schedule, as well as control programs is revealed. The possibility of using nozzle regulation leads to a weakening of the degree of influence of the main restriction. It was found that the optimal geometric characteristics tend to the regime with more work. The results of multi-mode optimization of a low-consumption turbine for various control programs and load schedules are presented in relation to the results of multi-mode optimization with a program that implements nozzle control in combination with a change in the initial parameters in front of the turbine. Multimode optimization for a program that implements nozzle regulation in combination with changing only the initial temperature in front of the turbine revealed a narrow adjusting ability of the initial temperature and the impossibility, in some cases, of satisfying the basic constraints on the equality of powers for all the studied load curves within the specified constraints on operating parameters. The results of the numerical experiment indicate that the approach developed by the author to the multi-mode optimization of a low-consumption turbine makes it possible to reduce fuel consumption, provided that a given load schedule is provided in comparison with traditional design methods for the nominal mode.

scholarly journals Organizational and technological risks during the formation of clusters in megapolis

2021 ◽  
Vol 258 ◽  
pp. 09061
Author(s):  
Mikhail Semenenko ◽  
Stepan Dral
Keyword(s):  
Urban Development ◽  
High Efficiency ◽  
Cluster Formation ◽  
Theoretical Data ◽  
Development Model ◽  
Definition Of ◽  
And Control

The paper presents the characteristics of the risks in the formation of residential clusters in a megalopolis. The main goal of the model of clusters of integrated urban development is the high efficiency of its functioning and implementation. Such a development model allows simultaneously realizing many goals: economic, social, technological, and also allows monitoring various construction parameters and controlling them at all stages of construction production. The paper gives a definition of risks in construction, a classification of the risks of cluster formation, and also provides methods for their assessment and control. In addition to theoretical data, the paper provides examples of situations both in Russia and abroad.

Suppressed, but Not Forgotten

2011 ◽  
Vol 70 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Beat Meier ◽  
Anja König ◽  
Samuel Parak ◽  
Katharina Henke
Keyword(s):  
Memory Trace ◽  
Thought Suppression ◽  
Test Phase ◽  
Indirect Test ◽  
Final Test ◽  
Test Experiment ◽  
And Control ◽  
Cue Words ◽  
The Impact

This study investigates the impact of thought suppression over a 1-week interval. In two experiments with 80 university students each, we used the think/no-think paradigm in which participants initially learn a list of word pairs (cue-target associations). Then they were presented with some of the cue words again and should either respond with the target word or avoid thinking about it. In the final test phase, their memory for the initially learned cue-target pairs was tested. In Experiment 1, type of memory test was manipulated (i.e., direct vs. indirect). In Experiment 2, type of no-think instructions was manipulated (i.e., suppress vs. substitute). Overall, our results showed poorer memory for no-think and control items compared to think items across all experiments and conditions. Critically, however, more no-think than control items were remembered after the 1-week interval in the direct, but not in the indirect test (Experiment 1) and with thought suppression, but not thought substitution instructions (Experiment 2). We suggest that during thought suppression a brief reactivation of the learned association may lead to reconsolidation of the memory trace and hence to better retrieval of suppressed than control items in the long term.

administrasi ketatausahaan sekolah

2020 ◽  
Author(s):  
Isra Revenia
Keyword(s):  
Information Needs ◽  
Control Functions ◽  
Definition Of ◽  
The Right ◽  
And Control

This article is made to know the destinantion and the administrasi functions of the school in order to assist the leader of an organazation in making decisions and doing the right thing, recording of such statements in addition to the information needs also pertains to the function of accountabilitty and control functions. Administrative administration is the activity of recording for everything that happens in the organization to be used as information for leaders. While the definition of administration is all processing activities that start from collecting (receiving), recording, processing, duplicating, minimizing and storing all the information of correspondence needed by the organization. Administration is as an activity to determine everything that happens in the organization, to be used as material for information by the leadership, which includes all activities ranging from manufacturing, managing, structuring to all the preparation of information needed by the organization.

A STRATEGY FOR MONITORING THE IMPACTS OF COMBINED SEWER OVERFLOWS ON THE OHIO RIVER

1994 ◽  
Vol 30 (1) ◽  
pp. 167-175
Author(s):  
Alan H. Vicory ◽  
Peter A. Tennant
Keyword(s):  
National Policy ◽  
The United States ◽  
Ohio River ◽  
Combined Sewer Overflows ◽  
Treatment Technology ◽  
Design Storm ◽  
Combined Sewer ◽  
Sewer Overflows ◽  
Definition Of ◽  
And Control

With the attainment of secondary treatment by virtually all municipal discharges in the United States, control of water pollution from combined sewer overflows (CSOs) has assumed a high priority. Accordingly, a national strategy was issued in 1989 which, in 1993, was expanded into a national policy on CSO control. The national policy establishes as an objective the attainment of receiving water quality standards, rather than a design storm/treatment technology based approach. A significant percentage of the CSOs in the U.S. are located along the Ohio River. The states along the Ohio have decided to coordinate their CSO control efforts through the Ohio River Valley Water Sanitation Commission (ORSANCO). With the Commission assigned the responsibility of developing a monitoring approach which would allow the definition of CSO impacts on the Ohio, research by the Commission found that very little information existed on the monitoring and assessment of large rivers for the determination of CSO impacts. It was therefore necessary to develop a strategy for coordinated efforts by the states, the CSO dischargers, and ORSANCO to identify and apply appropriate monitoring approaches. A workshop was held in June 1993 to receive input from a variety of experts. Taking into account this input, a strategy has been developed which sets forth certain approaches and concepts to be considered in assessing CSO impacts. In addition, the strategy calls for frequent sharing of findings in order that the data collection efforts by the several agencies can be mutually supportive and lead to technically sound answers regarding CSO impacts and control needs.

An LQ Approach to Active Control of Vibrations in Helicopters

1996 ◽  
Vol 118 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Sergio Bittanti ◽  
Fabrizio Lorito ◽  
Silvia Strada
Keyword(s):  
Optimal Control ◽  
Active Control ◽  
Linear Quadratic ◽  
Control Effort ◽  
Vibration Effect ◽  
Suitable Definition ◽  
Lq Optimal Control ◽  
The One ◽  
Definition Of ◽  
And Control

In this paper, Linear Quadratic (LQ) optimal control concepts are applied for the active control of vibrations in helicopters. The study is based on an identified dynamic model of the rotor. The vibration effect is captured by suitably augmenting the state vector of the rotor model. Then, Kalman filtering concepts can be used to obtain a real-time estimate of the vibration, which is then fed back to form a suitable compensation signal. This design rationale is derived here starting from a rigorous problem position in an optimal control context. Among other things, this calls for a suitable definition of the performance index, of nonstandard type. The application of these ideas to a test helicopter, by means of computer simulations, shows good performances both in terms of disturbance rejection effectiveness and control effort limitation. The performance of the obtained controller is compared with the one achievable by the so called Higher Harmonic Control (HHC) approach, well known within the helicopter community.

scholarly journals Method for designing multi-input system identification signals using a compact time-frequency representation

2021 ◽  
Author(s):  
Mathias Stefan Roeser ◽  
Nicolas Fezans
Keyword(s):  
System Identification ◽  
Design Method ◽  
Flight Test ◽  
Compact Representation ◽  
Time Frequency ◽  
Stability And Control ◽  
Frequency Representation ◽  
Aerodynamic Parameters ◽  
Definition Of ◽  
And Control

AbstractA flight test campaign for system identification is a costly and time-consuming task. Models derived from wind tunnel experiments and CFD calculations must be validated and/or updated with flight data to match the real aircraft stability and control characteristics. Classical maneuvers for system identification are mostly one-surface-at-a-time inputs and need to be performed several times at each flight condition. Various methods for defining very rich multi-axis maneuvers, for instance based on multisine/sum of sines signals, already exist. A new design method based on the wavelet transform allowing the definition of multi-axis inputs in the time-frequency domain has been developed. The compact representation chosen allows the user to define fairly complex maneuvers with very few parameters. This method is demonstrated using simulated flight test data from a high-quality Airbus A320 dynamic model. System identification is then performed with this data, and the results show that aerodynamic parameters can still be accurately estimated from these fairly simple multi-axis maneuvers.

Stirling Engine Technology for Parabolic Dish-Stirling System Based on Concentrating Solar Power (CSP)

2015 ◽  
Vol 785 ◽  
pp. 576-580 ◽  
Author(s):  
Liaw Geok Pheng ◽  
Rosnani Affandi ◽  
Mohd Ruddin Ab Ghani ◽  
Chin Kim Gan ◽  
Jano Zanariah
Keyword(s):  
High Efficiency ◽  
Combustion Engine ◽  
Renewable Energy Sources ◽  
Stirling Engine ◽  
Energy Sources ◽  
Heat Engines ◽  
Stirling Engines ◽  
Parabolic Dish ◽  
Mechanical Devices ◽  
And Control

Solar energy is one of the more attractive renewable energy sources that can be used as an input energy source for heat engines. In fact, any heat energy sources can be used with the Stirling engine. Stirling engines are mechanical devices working theoretically on the Stirling cycle, or its modifications, in which compressible fluids, such as air, hydrogen, helium, nitrogen or even vapors, are used as working fluids. When comparing with the internal combustion engine, the Stirling engine offers possibility for having high efficiency engine with less exhaust emissions. However, this paper analyzes the basic background of Stirling engine and reviews its existing literature pertaining to dynamic model and control system for parabolic dish-stirling (PD) system.

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