scholarly journals VIBRATION ADJUSTMENT OF ROTATING CONVERTERS WITH TECHNOLOGICAL DEFECTS LIMITING THE BALANCING QUALITY

2017 ◽  
pp. 87-94
Author(s):  
Dmitry Nikolaevich Semenov
Keyword(s):  
Technical State ◽  
Electrical Machine ◽  
Band Frequency ◽  
Vibration Diagnostics ◽  
Target Values ◽  
Technological Defects ◽  
Vibration Adjustment ◽  
Rotor Equipment ◽  
The Cost ◽  
Vibration Measuring

The present-day production and repair of vessels imply saving costs and retaining output quality. One of the cost items is maintenance of processing equipment of manufacturing plants with minimal expense. It can be implemented using up-to-date engineering diagnostics. Suggested tool equipment of vibration diagnostics and vibration adjustment allow not only controlling true technical state of electrical machine, but bring vibration level to target values. The set of methods, including RMS level vibration measuring, narrow-band frequency analysis and spectrum of envelope of vibration, provide insight into complete idea of true technical state of rotor equipment. Vibration adjustment methods, such as alignment, frame flatness setting-out, frame hardening, allow successfully to perform the balancing procedures. The article presents the symptoms of the most widespread defects of rotary converters, which are affected to perform mechanism balancing. Methods of successive elimination of revealed defects are described in detail by the example of converter vibration adjustment. According to the analysis results, application of methods and facilities of vibration diagnostics and vibration adjustment allow to significantly increase repair intervals and, as a consequence, to decrease costs of motor-operated mechanism repair.

Homeostasis and drinking

1979 ◽  
Vol 2 (1) ◽  
pp. 95-102 ◽  
Author(s):  
F. M. Toates
Keyword(s):  
Body Fluid ◽  
Fluid Intake ◽  
Realistic Model ◽  
Fluid Ingestion ◽  
Water Infusion ◽  
Target Values ◽  
Acute Changes ◽  
The Cost ◽  
Fluid Levels ◽  
Equivalent Reduction

AbstractDrinking and thirst-motivated behaviour have traditionally been explained in terms of the rather simple concept of homeostasis. A homeostatic mechanism readily accounts for responses to acute changes in body-fluid levels. However, there are other factors regulating intake, for example, cues associated with eating, which interact with the time elapsed since last drinking and the availability of water. Future dehydration is avoided by behavioural hysteresis; a sudden reduction in fluid needs is not matched by an equivalent reduction in fluid intake. Another factor not explicable by traditional homeostasis is that, in general, drinking cannot be suppressed by water infusion. Nor are there rigid target values for body-fluid levels independent of the cost of obtaining water; when water is hard to get, a relatively low body fluid level is maintained, thus minimizing loss. On the basis of the results conflicting with traditional homeostatic theory, this paper tentatively suggests certain modifications toward a more realistic model of fluid ingestion.

Technical efficiency analysis of the Indian drug and pharmaceutical industry

2014 ◽  
Vol 21 (5) ◽  
pp. 734-755 ◽  
Author(s):  
Varun Mahajan ◽  
D.K. Nauriyal ◽  
S.P. Singh
Keyword(s):  
Pharmaceutical Industry ◽  
Efficient Frontier ◽  
Raw Material ◽  
Managerial Performance ◽  
Content Type ◽  
Pharmaceutical Firms ◽  
Target Values ◽  
Usage Cost ◽  
Input Variables ◽  
The Cost

Purpose – The purpose of this paper is to measure technical efficiencies, slacks and input/output targets for 50 large Indian pharmaceutical firms. Design/methodology/approach – The data are collected from Prowess of Centre for Monitoring of Indian Economy for the financial year 2010-2011. This study uses data envelopment analysis approach, taking raw material, salaries and wages, advertisement and marketing and capital usage cost as input variables and net sales revenue as output variable. Findings – The paper finds that out of 50 firms, nine firms were overall technical efficient while 19 firms pure technical efficient and thus defined the efficient frontier. The BCC model identified that the inefficiency is either due to inefficient managerial performance or scale utilization. Further, firms are classified as high, low and middle robust firms on the basis of peer count. The study also analysed the slacks which were found to be significant in regard of some inputs, especially advertisement and marketing. The targets setting results have shown that all the inputs have significant scope for reduction. Practical implications – The empirical results are useful in assessing the relative efficiency of the large Indian drug and pharmaceutical industry (ID&P) firms. The managers and owners can take corrective actions to reduce the cost of operations by optimizing advertising and marketing cost, capital usage cost and salary and wages so as to improve their efficiency. Originality/value – Unlike the previous studies on the efficiency of the ID&P industry, the paper have shown the significance of improvement in managerial performance and scale utilization. In addition to this, excess inputs used in the production process and also possible target values of inputs and outputs are shown in the study. The robustness and stability of efficiency scores is also checked.

scholarly journals ITDS: An Intelligent Tissue Dispenser System

2019 ◽  
Vol 8 (3) ◽  
pp. 2613-2619
Keyword(s):  
Internet Of Things ◽  
Ultrasonic Wave ◽  
The Internet ◽  
Band Frequency ◽  
Main Contributor ◽  
Iot Applications ◽  
The Status ◽  
Main Components ◽  
The Cost ◽  
The Internet Of Things

The Internet of Things (IoT) technology is the main contributor in numerous smart applications. The reason is because it offers for 24/7 hours of control and maintenance geographically apart, thus reduces labor or manpower cost significantly. The 3 main components for any IoT applications are the source of power (energy), the microcontroller and the sensor (s) involved. Previous issues mainly related to how long the source of power could last for the applications to continue its operation. This paper presents IoT technology for hygiene application to address the utilization of toilet tissue named as Intelligent Tissue Dispenser System (iTDS). The iTDS device relies on the microcontroller and sensor in order to operate the intended task. The microcontroller used is an IoT based device called ESP8266 which is a WiFi-embedded microcontroller that utilized standard everyday WiFi band frequency which is at 2.4 GHz. For the sensor, an ultrasonic distance measurement device is used. The ultrasonic sensor transmit an ultrasonic wave that hit the object to be measured. Upon hitting the surface of the object to be measured, the wave is then reflected to the receiver of the sensor and the time difference between transmitted wave and received wave is calculated to get the actual distance of the object from the sensor. The main contribution of iTDS is to monitor and track for the toilet tissue to be refilled. The implementation shows the iTDS ables to update for the status of each tissue which reducing the cost of manually human checking for tissue refill.

scholarly journals Behind the Five-Year Plan: the Timber Processing Complex of the USSR in Annual Plans for 1935–1937

2021 ◽  
Vol 17 (2) ◽  
pp. 161-177
Author(s):  
Ivan V. Zykin
Keyword(s):  
Soviet Union ◽  
Timber Harvesting ◽  
High Rate ◽  
Forced Labor ◽  
Forest Industry ◽  
Capital Investments ◽  
New Economic Policy ◽  
The Soviet Union ◽  
Target Values ◽  
The Cost

Introduction. The timber processing complex became an important component of the project of “socialist industrialization” of the late 1920s – early 1940s in the Soviet Union. The first five-year plan was not implemented by the industry, despite a significant increase in indicators compared to the period of the “new economic policy”. The development of the forest industry in the second five-year plan should have become more balanced and not lose dynamism. During this period, the economic structure of the industry was relatively homogeneous. An analysis of the indicators of annual national economic plans in the context of the second five-year plan becomes relevant. Historiography of the period of “socialist industrialization” and, in particular, 1933–1937 consists mainly of studies of foreign and domestic scientists on the Soviet economy and works on the history of the forest industry of certain regions. Materials and Methods. The theoretical and methodological basis of the study is the concept of modernization. Based on the information of the second five-year plan and annual plans, series of data on the development of the timber processing complex of the Soviet Union were formed. Results. At the beginning of the second five-year plan, the industry experienced stagnation of production and financial indicators, failure to fulfill annual plans. Then, as capital investments increased, the construction of enterprises was completed, capacities were developed, new forms of socialist competition developed, the timber processing complex demonstrated a significant improvement in the results of activities. Labor productivity increased at a relatively high rate in the fields of machining and deep processing of wood, but slowly grew in the field of timber harvesting. Unsatisfactory tasks were performed to reduce the cost of production. Conclusions. The main volumes of work in the timber processing complex were carried out by the Narkomles (People’s Committee of Forest Industry) of the USSR. In 1935–1936 it became possible to approach the target values of the second five-year plan, which, however, was not fully implemented due to the beginning of mass repressions and the transfer of part of the enterprises to forced labor camps. Summing up the planned and actual results of the timber processing complex for 1933–1937 showed that the industry fulfilled the five-year plan by 80–90 %, and in some areas surpassed it.

scholarly journals Digital transformation of machining workshop’s manufacturing system

2021 ◽  
Vol 2131 (3) ◽  
pp. 032099
Author(s):  
E Reshetnikova ◽  
P Bochkarev ◽  
G Gumarov
Keyword(s):  
Technological Process ◽  
Manufacturing System ◽  
Design Stage ◽  
Suggested Approach ◽  
Relevant Today ◽  
Cost Of Time ◽  
Technological Defects ◽  
Automation Technology ◽  
The Cost ◽  
Production Errors

Abstract The article proposes the method of intellectualization workshop’s manufacturing system. The digital technology is widely developed today so intellectualization of manufacturing system is relevant today. The use of AMT-supported manufacturing process in manufacturing system contributes to obtaining advantages in material and financial terms and reducing the cost of time resources.The use of automation technology in workshop process assumes cutbacks to its funding and ensures its digitalization. The digitalization is aimed at eliminating production errors and shortcomings already at the design stage of the production process. In consequence of this technological defects of products are reduced and the technological process is well organized. The use of an innovative approach to the development of the technological process of manufacturing products allows reducing time resources and increasing technical efficiency. Actualization of the suggested approach provided with system of computer-aided planning multiproduct technologic process. This system is developed by the authors and aimed at planning the intelligent product campaign. The presented algorithmic and software support for the formation of a rational set of control-and-measuring tools provides the development of a rational technological process for manufacturing a product and automation of the production’s technological preparation.

scholarly journals Non-linear Impact of the Short Circuit Impedance Selection on the Cost Optimized Power Transformer Design

2020 ◽  
Vol 64 (3) ◽  
pp. 221-228
Author(s):  
Tamás Orosz ◽  
Zoltán Ádám Tamus
Keyword(s):  
Design Process ◽  
Power Transformer ◽  
Short Circuit ◽  
Design Rule ◽  
Design Parameters ◽  
Electrical Machine ◽  
Preliminary Design ◽  
Large Power ◽  
Final Design ◽  
The Cost

Since the electrical machine design is a complex task it can be divided into sub-problems, e.g. preliminary and final design processes and checking of the final design. This paper deals with the preliminary design process, which provides the key-design parameters of the electrical machine. Traditionally, these electrical machine models in preliminary design phase neglect or use oversimplified insulation system models and the tap changing selection is not involved during the calculation of key-design parameters. The aim of this study is to assess the effect of the insulation distance minimization and tap-changing on the key design parameters of a cost-optimized large power transformer. For this purpose, the paper shows some examples, where the cost optimal design — in contrast to the classical insulation design rule — contains larger insulation distances than the possible minimum values. The effect of tap-changing methods are also investigated. These cost optimization made by a verified, metaheuristic method-based transformer optimization algorithm. The results show involving the insulation design and tap-changing selection into the preliminary design process can provide more economical designs.

Investigation of Turbine Coolers Vibration Parameters

2003 ◽  
Author(s):  
Vladimir L. Simonov
Keyword(s):  
Air Conditioning ◽  
Technical State ◽  
Measuring System ◽  
Air Conditioning System ◽  
Vibration Parameters ◽  
Vibration Measuring ◽  
Angular Oscillations

Aviation turbine coolers (TC) are the main units in airplane air conditioning system. In this paper described are investigations aiming to estimate turbine coolers’ technical state using analysis of vibration parameters. In order to do this, an optoelectronic vibration-measuring system was designed. This system was intended for measurements of linear and / or angular oscillations of various points on housing and rotor of the turbine cooler. Appropriate software for vibration specters procession was created. Experiments were conducted in laboratory and plant conditions.

Selecting System Concept by Minimizing Cost of Part Requirement Tolerances

2006 ◽  
Author(s):  
Shun Takai
Keyword(s):  
The Other ◽  
Know How ◽  
System Concept ◽  
Conceptual Design Phase ◽  
Target Values ◽  
Small Set ◽  
The Cost ◽  
The Relationship ◽  
Final System ◽  
Control Part

At the end of a conceptual design phase, engineers choose a single (or a small set of) system concept from a large number of concept variants. In most cases, there is not enough design information to quantitatively evaluate how a final system developed from each concept would perform and cost. Thus engineers need to first perceptually evaluate and select a concept, and then design a system. On the other hand, if engineers know analytical relationships between system and part requirements, they can specify target values of part requirements such that a system achieves its target requirements. Furthermore, if engineers know how much it will cost to control part requirements within tolerances, they can minimize the cost of a system by optimizing tolerances of part requirements. This paper proposes and illustrates an approach to select a system concept when engineers know the relationship between system and part requirements, and how much it will cost to control part requirements within tolerances. Engineers choose a concept that minimizes cost.

scholarly journals An experimental study of the effect adding locally manufactured shear studs on raising the punching of the flat slabs: دراسة تجريبية لأثر إضافة عناصر قص مصنعة محليا في رفع كفاءة البلاطات المسطحة على الثقب

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Alaa Ali Saadat, Abd Alhamed Kikhea
Keyword(s):  
Laboratory Experiments ◽  
Concrete Slabs ◽  
Ideal Solution ◽  
Structural Elements ◽  
Flat Slabs ◽  
Reinforced Concrete Slabs ◽  
Breakdown Mechanism ◽  
Working Principle ◽  
Technological Defects ◽  
The Cost

The slabs are one of the important structural elements in the buildings and constitute approximately 60% of the concrete size used. The flat slabs are an ideal solution that guarantees the speed and ease of implementation, especially in multi-storey buildings. The phenomenon of punching is a fundamental defect in these slabs, and the Syrian code addressed it to treat it in traditional ways such as making crowns for columns or falls of beams, which creates architectural and technological defects. The research includes conducting laboratory experiments on reinforced concrete slabs and analyzing the results with the aim of strengthening the flat slabs punching within the same thickness of the approved slab by linking the lower and upper reinforcement steel which provides a working principle similar to the trusses. The strength was made using shear studs (distribution case, matrix or diagonal), which in turn raised the efficiency of flat concrete slabs on the punching in terms of durability, deformations, and the breakdown mechanism in this case. The importance of the research lies in the use of locally manufactured elements within the workshop without the need for ready-made shear studs, which reflects positively on the cost and time of implementation.

Sign in / Sign up

Export Citation Format

Share Document