Electromechanical Products Research Articles

Optimal Timing and Recycling Operation Mode for Electro-Mechanical Products Active Remanufacturing

Optimal Timing and Recycling Operation Mode for Electro-Mechanical Products Active Remanufacturing

A Prognostics and Health Management Based Method for Refurbishment Decision Making for Electromechanical Systems

Refurbishing end of life electromechanical products is a value-added operation that provides both economic and environmental benefits. To maximize the benefits from refurbishing, decision making is critical, where the optimized time and the right component for manufacturing are determined. However, there has not been any satisfactory refurbishing decision-making strategy developed. In this paper, a prognostics and health management-based method is developed for refurbishment decision making. First, components are selected for in-situ monitoring using failure modes, mechanisms and effects analysis, then the remaining useful life for the system is estimated by analyzing the in-situ monitoring data so that the optimized refurbishing time can be determined. Finally, near the end of the system life, certain degraded components are selected via diagnosis, and refurbishment is carried out. The procedure of the method is evaluated by an analysis of the refurbishment of instruments in industrial process control. Using this method, the remaining useful life of electromechanical products can be optimally used, and the cost of refurbishment can be minimized.

Research on Green Manufacturing Technology for Electromechanical Products

At present, the human society is undertaking the sustainable development strategy of globalization. In the process of development of electromechanical products, manufacturing mode is undergoing profound changes with the progress of human society Green manufacturing is essentially an embodiment sustainable development strategy of human society in modern manufacturing industry. Green manufacturing mode is widely accepted by governments and various circles of society, it is showing the trend of internationalization and legislation. Electromechanical products green manufacturing is a modern manufacturing mode which is comprehensive consideration of environmental impact and resource efficiency. It is the goal of product design, manufacturing, packaging, transportation, use and disposal of the product life cycle, minimum impact on the environment, resource use efficiency highest, and makes the enterprise economic benefit and social benefit coordination optimization. Electromechanical products green manufacturing as the mode of sustainable development has become an inevitable choice for enterprise product upgrades.

Research on Green Design Overall Technology of Electromechanical Products

With the development of global industrial, electromechanical products enterprises create wealth for the mankind at the same time, but also consume a lot of resources, and cause serious environmental pollution. In the design stage, enterprises must consider to prevent environmental pollution, to save resources and energy. The whole life cycle of electromechanical product refers to design, manufacturing, transportation, sales, use, and recycling etc. Protection resources and environment is the whole life cycles core. Green design is from cradle to cradle. The technologies of green design are different from the traditional design which is only pay attention to function. It is not only to meet the needs of the people and solve the problem for the traditional starting point for the design, but also must to consider the use of natural resources, reduces types and quantities of pollutants, effective reuse, and reasonable cost of materials.

A Research of Electromechanical Products Green Design Based on Voice of Customer

The customer is the starting point for green design of electromechanical product demand, also the bridge of connecting to the market and the mechanical and electrical product development process. Enterprises effectively obtain and understand customer needs, and accurately define the demand information of mechanical and electrical products in the design process, which is the necessary precondition for the successful design of mechanical and electrical products in the global market environment. The designer obtains accurately and effectively information of demand of mechanical and electrical products, which is an important link of product design process. It will also directly affect the subsequent steps in the process of product development. Therefore, all aspects of mechanical and electrical products manufacturing enterprises work should depend on customer demand. To meet the design idea of customer demand should be fully integrated into every link in the development of mechanical and electrical products. Enterprise can not only shorten the time of mechanical and electrical products, but also have a significant impact on the design of mechanical and electrical products quality.

Research on Green Electromechanical Product Design Based on Disassembly

Green electromechanical product is the core which protects the environment and resources. Design for disassembly is the main content of green electromechanical product design. Traditional electromechanical product design is chief considerations the effective use of assembly and material. It is not consideration the waste processing, and is an open-loop system. When it creates wealth for the mankind, electromechanical product produce a lot of wastes, and Cause a large number of resources waste. At present, the waste disposal costs are more increasing. Mechanical manufacturing enterprises have pay attention to effectively implement the recycling and reuse of materials. Green m electromechanical product disassembly is an important content of green design. In the product design stage, enterprise must put disassembly as design objective, considers product future reuse, efforts to improve the mechanical parts of the disassembly rate, form a mechanical product life cycle in closed-loop system. In this way, enterprises not only can save materials and energy, but also can reduce the pollution of environment.

Reliability evaluation method and algorithm for electromechanical product

The reliability of electromechanical product is usually determined by the fault number and working time traditionally. The shortcoming of this method is that the product must be in service. To design and enhance the reliability of the electromechanical product, the reliability evaluation method must be feasible and correct. Reliability evaluation method and algorithm were proposed. The reliability of product can be calculated by the reliability of subsystems which can be gained by experiment or historical data. The reliability of the machining center was evaluated by the method and algorithm as one example. The calculation result shows that the solution accuracy of mean time between failures is 97.4% calculated by the method proposed in this article compared by the traditional method. The method and algorithm can be used to evaluate the reliability of electromechanical product before it is in service.

Comprehensive Optimization Based on Entropy Weight of Electromechanical Product Reliability Evaluation Model

The failure data of the electromechanical product satisfies a certain law that a batch of failure data usually meet a variety of distributions at the same time. As to this phenomenon, an optimization method of evaluation model of reliability which is combined with the concept of entropy was put forward in this work. In the optimization process, several empirical models and multiple evaluation indexes were proposed for selecting a best model of reliability evaluation model, and entropy weight was defined to show the importance of evaluation indexes.

Configuration Modeling and Experimental Verification with 3D Laser Scanning Technology for a Constrained Elastica Cable

For large complex electromechanical products, cable digital design has a problem of low accuracy because of its large deformable characteristics. To solve the problem, an efficacious method is proposed to do cable geometry physical modeling, simulation and test for two-end constrained spatial flexible cables. Euler angles are used as generalized parametric variables to describe cable configuration on the base of Kirchhoff elastic rod theory. Via establishment of a cylindrical coordinate system according to Saint-Venant principle using end constraint, Euler angles’ Analytical solutions of the Kirchhoff equations are gained. Based on an open source geometry kernel system and using numerical integration ideas, a cable configuration simulation platform is developed in C++ environments. Then, a cable geometry measurement bench is founded with the use of 3D laser scan technology. Finally, a cable configuration simulation and experimental example is given to verify the accuracy of the proposed model and relative algorithm, through 3D positional deviation analysis.

Improving Product Appearance Based on Industry Design

In this paper, the characteristics of industrial design for mechanical and electrical products conducted in-depth study and exploration of based on related design theory and design methods, and based on the analysis of the functional characteristics, mechanical and electrical products, morphological characteristics and user characteristics, systematically summarizes electromechanical products of industrial design target, industrial design method and process of industrial design, industrial design show characteristics of the product to a certain extent.

An Evaluation Model for the Interactive Interface of ElectroMechanical Products Based on Feature Analysis

An Evaluation Model for the Interactive Interface of ElectroMechanical Products Based on Feature Analysis

Overall life cycle comprehensive assessment of pneumatic and electric actuator

Pneumatic actuators and electric actuators have almost been applied to all manufacturing industries. The two kinds of actuators can replace each other in most fields, such as the point to point transmission occasion and some rotating occasions. However, there are very few research results about the advantages and disadvantages of two kinds of actuators under the same working conditions so far. In this paper, a novel comprehensive assessment method, named as overall life cycle comprehensive assessment (OLCCA), is proposed for comparison and assessment of pneumatic and electric actuators. OLCCA contains mechanical properties evaluation (MPE), life cycle cost analysis based on users (LCCABOU) and life cycle environmental impact analysis (LCEIA) algorithm in order to solve three difficult problems: mechanical properties assessment, cost analysis and environmental impact assessment about actuators. The mechanical properties evaluation of actuators is a multi-objective optimization problem. The fuzzy data quantification and information entropy methods are combined to establish MPE algorithm of actuators. Two kinds of pneumatic actuators and electric actuators with similar bearing capacity and similar work stroke were taken for example to verify the correctness of MPE algorithm. The case study of MPE algorithm for actuators verified its correctness. LCCABOU for actuators is also set up. Considering cost complex structure of pneumatic actuators, public device cost even method (PDCEM) is firstly presented to solve cost division of public devices such as compressors, aftercooler, receivers, etc. LCCABOU method is also effective and verified by the three groups of pneumatic actuators and electric actuators. Finally, LCEIA model of actuators is established for the environmental impact assessment of actuators. LCEIA data collection method and model establishment procedure for actuators are also put forward. With Simapro 7, LCEIA comparison results of six actuators can be obtained: Fossil fuels are the major environmental factor of pneumatic and electric actuators; Environmental impact of electric actuator is large than one of pneumatic actuator under the similar mechanical properties and working conditions of pneumatic and electric actuators. The results are correct and correspond with the actual mechanical properties of actuators. This paper proposes a comprehensive evaluation method of the actuators, which can solve the critical problem that similar electromechanical products are very difficult to be compared with each other from the angle of performance, cost and environment impact.

Interactive operation of physically-based slender flexible parts in an augmented reality environment

In order to deal with the problems of laying and assembly planning of slender flexible parts in electromechanical products, a novel approach to operate the physically-based slender flexible parts in an augmented reality environment is presented in this paper. A discrete dynamic method is used to efficiently build the physical model of slender flexible parts, which is very well suited for interactive operation in the augmented reality environment. In this model, bending penalty force can be calculated by the bending energy function to improve dynamic bending behavior, and a penalty method is used to simplify the calculation of geometric torsion. With a reasonable construction of augmented reality environment, a real-time interactive algorithm based on the operating panel is proposed to enable users to interact with the virtual slender flexible parts in the mixed reality-based scene. A case study in the augmented reality environment shows that the proposed approach is efficient and feasible.

Research on Conceptual Design of Green Electromechanical Products

The concept design of green products is according to the various phases of the product life cycle, product function to create and functional decomposition, to meet the principle of solving functional requirements and Realization of the idea and the system design principle of vector scheme of function structure. The conceptual design process is a process of divergent thinking and innovative design, the optimal process plan. Therefore, the conceptual design stage is a very innovative design stage, is also the green design is the most important stage.

Monotone Constraint Model Applied to the Reliability Growth Evaluation of Electromechanical Products

Reliability growth assessment is an important part of the reliability growth management. According to the characteristic that the lifetime of electromechanical product obeys the Weibull distribution, the thesis provides a monotonous constraint model of reliability growth of Weibull distribution, including complete Samples and censored samples. The method proposed in this paper has been verified by actual data, and has good adaptability. The comprehensive evaluation results of MTBF are higher than those got through only utilizing the test data of the last stage.Background Information

Green design assessment of electromechanical products based on group weighted-AHP

Manufacturing industry is the backbone of a country’s economy while environmental pollution is a serious problem that human beings must face today. The green design of electromechanical products based on enterprise information systems is an important method to solve the environmental problem. The question on how to design green products must be answered by excellent designers via both advanced design methods and effective assessment methods of electromechanical products. Making an objective and precise assessment of green design is one of the problems that must be solved when green design is conducted. An assessment method of green design on electromechanical products based on Group Weighted-AHP (Analytic Hierarchy Process) is proposed in this paper, together with the characteristics of green products. The assessment steps of green design are also established. The results are illustrated via the assessment of a refrigerator design.

Disassembly sequence planning for electro-mechanical products under a partial destructive mode

Purpose – To improve the efficiency and economy of electro-mechanical product's recycle process, this paper aims to propose a disassembly sequence planning (DSP) method to reduce additional efforts of removing extra parts in selectable disassembly. Design/methodology/approach – The methodology has three parts, which includes a disassembly hybrid graphic model to describe the product disassembly information, an object inverse-directed method to optimize the disassembly design and a model reconstruction method to achieve a better DSP. Findings – According to the disassembly cost criteria and the parameters of disassembly tools, the disassembly efficiency increases and the disassembly cost decreases due to the use of partial destructive mode compared with non-destructive mode. The proposed partial destructive DSP is more efficient and economical. Research limitations/implications – Partial destructive disassembly mode cannot be used for the flammable or explosive component in the procedure of the DSP optimization algorithm. Practical implications – DSP of an electric corkscrew is analyzed to investigate the accuracy and efficiency of the proposed method. Originality/value – This paper proposes a partial destructive disassembly based DSP method for product disassembly, which provides a new approach for the disposal of end-of-life products.

Research on the Reliability of the Electromechanical Products Based on the Fuzzy Theory

Mechanical and electrical products are more and more widely used in all the fields of the society. With the increase in the degree of automation and miniaturization, the structure of many mechanical and electrical products is becoming more and more complex, and the conditions of the use are also increasingly harsh, and therefore more and more product reliability issues are arising, and the reliability technology is being paid more and more attention to. In this paper, aiming at the mechanical and electrical products, from the three aspects of reliability management, reliability design and analysis, and reliability test and evaluation, the reliability research is preliminary studied.

Assembly Process Planning Method for Complex Electromechanical Products

Currently, neither the efficiency nor the effectiveness is sufficient in the area of the assemble optimization that commonly involves the genetic algorithm. A novel method to solve the cumbersome problem in the optimization of assembly sequences was proposed. On the basis of the assembly constraint matrix, the optimized assembly sequence is obtained with the proposed evaluating factors of the process requirement. That is the evolution of the original genetic algorithm to a certain extent. The effectiveness of the proposed method was proved by the comparison with the ant colony algorithm.

Agent-based station for on-line diagnostics by self-adaptive laser Doppler vibrometry

A self-adaptive diagnostic system based on laser vibrometry is proposed for quality control of mechanical defects by vibration testing; it is developed for appliances at the end of an assembly line, but its characteristics are generally suited for testing most types of electromechanical products. It consists of a laser Doppler vibrometer, equipped with scanning mirrors and a camera, which implements self-adaptive bahaviour for optimizing the measurement. The system is conceived as a Quality Control Agent (QCA) and it is part of a Multi Agent System that supervises all the production line. The QCA behaviour is defined so to minimize measurement uncertainty during the on-line tests and to compensate target mis-positioning under guidance of a vision system. Best measurement conditions are reached by maximizing the amplitude of the optical Doppler beat signal (signal quality) and consequently minimize uncertainty. In this paper, the optimization strategy for measurement enhancement achieved by the down-hill algorithm (Nelder-Mead algorithm) and its effect on signal quality improvement is discussed. Tests on a washing machine in controlled operating conditions allow to evaluate the efficacy of the method; significant reduction of noise on vibration velocity spectra is observed. Results from on-line tests are presented, which demonstrate the potential of the system for industrial quality control.