The Design Concept Application on RMS for Tail Drive System of Civil Helicopter

2011 ◽  
Vol 86 ◽  
pp. 120-124
Author(s):  
Wei Zhen Liu ◽  
Wen Qiang Ding ◽  
Yong Hong Wang
Keyword(s):  
Market Competition ◽  
Test Methods ◽  
Transmission System ◽  
Drive System ◽  
Design Concept ◽  
Maintenance Cost ◽  
Design Phase ◽  
Product Model ◽  
Detail Design ◽  
Concept Application

To raise the market competition ability of the civil helicopter, it is required to have high technical content in RMS including reliability, maintainability, safety, supportability and testability for the new generation civil helicopter. To meet the requirements of the civil helicopter, it is decided to follow strictly the maintenance matrix from the preliminary design phase of the transmission system. To decrease the maintenance cost, the structure will be optimized during the detail design phase and checked by DMU (Digital Mockup) in VPM (Virtual Product Model) system. And to get the high safety and reliability, some advanced design technical are applied and substantiated by some new test methods. This paper explains design concept application on RMS for tail drive system of the civil helicopter by showing some practice for an example. It can provide the method and reference for the development of civil helicopter transmission system.

Primary Application of the ILS Technology in the Tail Rotor Drive System of the Certain-Type Helicopter

2011 ◽  
Vol 86 ◽  
pp. 133-138
Author(s):  
Cheng Duan ◽  
Jie Gao ◽  
Yong Hong Wang ◽  
Yong Lin
Keyword(s):  
Transmission System ◽  
Drive System ◽  
Maintenance Cost ◽  
Work Efficiency ◽  
Work Content ◽  
Main Work ◽  
Rotor Drive ◽  
Development Experience ◽  
Logistic Support

This paper summarizes the connotation, the work objective and the main work content of the ILS (Integrated Logistic Support) technology which belongs to the transmission system by using a template for the development experience of tail rotor drive system of the certain-type helicopter. It introduces a primary way which is about how to improve the work efficiency and reduce the maintenance cost of tail rotor drive system of the certain-type helicopter by using the technology. It expounds the relation between the ILS technology and the reliability, the safety, the maintainability, the supportability and the testability, the ideology of the technology.

The development of a Single-Well Oil Production System

1982 ◽  
Vol 307 (1499) ◽  
pp. 279-287
Keyword(s):  
Conceptual Design ◽  
Production System ◽  
Oil Production ◽  
Design Phase ◽  
New Approach ◽  
Detail Design ◽  
Single Well ◽  
Operational Criteria

Since early 1980, BP has been developing the conceptual design of a Single-Well Oil Production System or SWOPS. This paper outlines the concept and discusses the design and the operational criteria that have been applied in this early work. It further examines some of the innovative areas of technology that have been included in this new approach and outlines the work of the detail design phase, which has just started.

scholarly journals Noise source identification of three pulleys and one belt drive system based on sound array technology

2020 ◽  
pp. 002029402094497
Author(s):  
Shi Yaochen ◽  
Zhao Tianxiang ◽  
Chen Guoping ◽  
Li Zhanguo ◽  
Tang Wusheng
Keyword(s):  
Characteristic Curve ◽  
Transmission System ◽  
Drive System ◽  
Belt Drive ◽  
Experimental Conditions ◽  
Array Technology ◽  
Noise Test ◽  
Array Measurement ◽  
Comparison Of The Results ◽  
Belt Transmission

This paper analyzed the noise distribution of three pulleys and one belt system theoretically and experimentally. Aiming at the influence of the tensioner on the transmission noise of the synchronous belt, on the premise of theoretical analysis of the influence of the tensioner on the transmission noise of the synchronous belt, the noise test of the synchronous belt transmission system with and without the tensioner was carried out under the same experimental conditions. Based on the principle of acoustic array measurement, a three-pulley and one belt noise test device was designed. The noise pressure distribution nephogram and amplitude–frequency characteristic curve were obtained by noise tests at different speeds. Through the comparison of the results of two groups of tests, the influence rule of the tensioner on the transmission noise of the synchronous belt was obtained. The results show that the tensioner can effectively avoid the resonance of the synchronous belt, and the noise amplitude of the three-pulley and one belt drive system is 3 dB higher after the tensioner is installed. It provides a basis for vibration and noise reduction of the engine timing transmission system.

Dynamic Simulation Analysis of Asymmetric Involute Gear Drive System

2012 ◽  
Vol 215-216 ◽  
pp. 974-977 ◽  
Author(s):  
Li Ming Lian ◽  
Gui Min Liu
Keyword(s):  
Dynamic Simulation ◽  
Dynamic Characteristics ◽  
Simulation Analysis ◽  
Dynamic Performance ◽  
Transmission System ◽  
Drive System ◽  
Gear Transmission ◽  
Gear Drive ◽  
Involute Gear ◽  
Gear Transmission System

The dynamic performance of asymmetric involute gear transmission system is analyzed by the MSC.ADAMS software during the paper. By comparative analyzed with the traditional dynamic characteristics of symmetrical involute straight gear transmission, it can be summarized that the asymmetric involute gear transmission system has better vibration characteristics in the course of transmission.

scholarly journals Practical Energy Retrofit of Heat Exchanger Network Not Containing Utility Path

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2711 ◽  
Author(s):  
Zdeněk Jegla ◽  
Vít Freisleben
Keyword(s):  
Heat Exchanger ◽  
Energy Savings ◽  
Cost Minimization ◽  
Design Stage ◽  
Maintenance Cost ◽  
Operational Parameters ◽  
Heat Exchanger Network ◽  
Energy Retrofit ◽  
Detail Design ◽  
Minimal Modification

The paper presents a method developed for the energy retrofit of specific Heat Exchanger Networks not containing Utility Paths. This useful and highly practically oriented method involves a systematic approach to obtaining the most efficient minimal modification topology of a Heat Exchanger Network, which brings the greatest benefits in terms of energy savings of the modified process. In principle, it is focused on finding the most suitable location for a new heat exchanger insertion to create the most efficient Utility Path. The next step of the developed retrofit method is the detailed design of the newly integrated heat exchanger using commercial software in combination with several heuristic rules regarding the cost-free investment and maintenance cost minimization of a new heat exchanger and considering heat transfer enhancement within the available exchanger type, space, and fluids pressure drop constraints. The detail design stage of the method also includes observation and reassessment of the performance and operational parameters of the existing heat exchangers. Then, the developed method is applied to the case of the Heat Exchanger Network retrofit in the process of the hydrogenation of oil.

Assessment of factors affecting maintenance cost of public school facilities

2019 ◽  
Vol 37 (5) ◽  
pp. 528-546
Author(s):  
Mohammad A. Hassanain ◽  
Mohammad Al-Zahrani ◽  
Abdullatif Abdallah ◽  
Ahmed M.Z. Sayed
Keyword(s):  
Public School ◽  
Cost Effective ◽  
School Facilities ◽  
Maintenance Cost ◽  
Design Phase ◽  
Effective School ◽  
Content Type ◽  
Factors Affecting ◽  
Importance Index ◽  
Operations And Maintenance

Purpose The purpose of this paper is to identify and assess the significance of various factors affecting maintenance costs of public school facilities. Design/methodology/approach Detailed literature review resulted in identifying 54 factors that were categorized under nine groups. This was followed by a questionnaire survey completed by 60 experienced professionals. The relative importance index was used to determine the in-group ranking, as well as the overall ranking of these factors. Findings The study established that the five most significant factors affecting the maintenance cost of public school facilities were “not providing operations and maintenance manuals to maintenance group” in the “construction phase” category, “ignoring maintainability studies in design” in the “design phase” category, “specification of low-quality materials” in the “design phase” category, “selection criteria of contractors” in the “regulations and contracting” category, and “lack of quality control during work execution” in the “construction phase” category. Originality/value The present research represents the first research covering the maintenance cost of public school facilities in Saudi Arabia. The study also presents the unique landscape of facility maintenance in the Saudi Arabian context. The outcome of this research has the potential to significantly cut down unnecessary costs rooted in expensive maintenance of public school facilities, enhancing the quality of these facilities. The findings also underscore the necessity of collaboration and coordination of the various key disciplines toward the realization of cost-effective school facilities.

Structural Deformation and Stress Analysis of Aircraft Wing by Finite Element Method

2014 ◽  
Vol 906 ◽  
pp. 318-322 ◽  
Author(s):  
M. Fazlay Rabbey ◽  
Anik Mahmood Rumi ◽  
Farhan Hasan Nuri ◽  
Hafez M. Monerujjaman ◽  
M. Mehedi Hassan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Structural Properties ◽  
Structural Deformation ◽  
Design Parameters ◽  
Design Phase ◽  
Aircraft Wing ◽  
Detail Design ◽  
The Cost ◽  
Element Method

Wing of an aircraft is lift producing component. It makes aircraft airborne by generating lift>weight. The wing must take the full aircraft weight during flying. So, it is very sophisticated task for designing a wing by keeping consideration of every design parameters simultaneously. This paper contains analysis of structural properties of wing by using finite element method. For well-organized design all the variables must be considered from the beginning of the design phase. The design phases for aircraft are: conceptual, preliminary and detail design. Until the preliminary design phase the aircraft structure is not considered. During these phases the material of the wing should be selected in such a way so that it can perform efficiently with less unexpected phenomena (drag) for which responsible properties are displacement, stress etc. Currently the most focusing area for the aero-elastic investigation is to design wing with good aerodynamic shape which will associated with less dragging structural behavior. It helps to reduce SFC (Specific Fuel Consumption) and so the cost. The analysis on that has done through Computational means as well as simulation technique to develop knowledge about the variation of aircraft wing structural properties.

Transmission System Improvements in Actuating a Desktop Haptic Strip for Exploration of Virtual Objects

2011 ◽  
Author(s):  
Mario Covarrubias ◽  
Monica Bordegoni ◽  
Umberto Cugini ◽  
Michele Antolini
Keyword(s):  
Triangular Mesh ◽  
Transmission System ◽  
Design Concept ◽  
Real Surface ◽  
Aesthetic Value ◽  
Virtual Objects ◽  
Industrial Designers ◽  
And Control ◽  
Hand Contact

This paper describes the servo actuated transmission system required to drive a desktop haptic strip interface. The haptic strip is a mechatronic device which is used for exploration of virtual surfaces with aesthetic value. The simulation of tasks, such as the exploration of aesthetic real surfaces made by industrial designers in order to check the quality of prototypes, require full hand contact with the shape on a one-to-one scaled representation of the object. Our mechatronic device allows a continuous, free hand contact on a developable real plastic tape actuated by a servo-controlled mechanism in which is used the tessellation approach. In fact, the triangular mesh simplifies the conformation of the developable real surface as the virtual one. This paper discusses the design concept, novel kinematics and mechanics, improvements of the transmission system and control for the Desktop Strip.

Explicit Evaluation of Design Readiness for Student Refinement of Conceptual Design

2019 ◽  
Author(s):  
Kenji Iino ◽  
Masayuki Nakao
Keyword(s):  
Conceptual Design ◽  
Mechanical Engineering ◽  
Design Concept ◽  
Graduate Schools ◽  
Design Concepts ◽  
Detail Design ◽  
Explicit Evaluation ◽  
The University ◽  
The Way

Abstract Students at three graduate schools of mechanical engineering and adult groups in Japan have been taking conceptual design courses the authors teach. Among the three graduate schools, the 24 hour course, at the University of Tokyo, spread over 13 classes during 4 months, takes the students all the way from identifying their design goals, generating ideas, refining their designs, to building prototypes. The adult course students also spend long hours of building prototypes. Despite strong encouragement by the instructors for detail design, the students often leave their design concepts at rough stages without refining their ideas to the detail level needed for prototype building. Building a prototype from a design concept that is not fully expanded often results in efforts that lead to failure and retrial. Such back and forth between concepts and physical trial is unavoidable in design, however, if possible they better be kept at the minimum. The instructors, in their efforts to better motivate students to refine the designs, developed a metric “Level of Readiness (LOR) index” for evaluating how refined a design is. Students are better motivated to reach higher scores and this index that evaluate the quality of their designs, in terms of how detail they are, in numbers serves as a better incentive for the students than words from the instructors.

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