Nonlinear Dynamic Characteristics Analysis of Planar Mechanism Multibody System Considering Lubrication Clearances

Xiulong Chen,Peng Pan,Tao Wang 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.24 No.11

Due to various factors, there will inevitably be clearance in the mechanism. The clearance can reduce the accuracy and stability of mechanism, while lubrication effectively improves this situation. Previous researches mainly centered on mechanism with dry friction clearance, but less on complex mechanism with lubrication clearance. Moreover, previous researches mainly centered on dynamic response of mechanism, while less on nonlinear characteristics of mechanism. To research the impact of lubrication clearances of mechanism, nonlinear dynamic characteristics of nine-bar mechanism multi-body system are studied. Lubrication force model is established by modified Pinkus–Sternlicht model. Dynamic model of mechanism with lubrication clearances is established by Lagrange multiplier method. The experimental platform of the mechanism is built, and correctness of theoretical model is verified by experiments. This paper analyzes the influence of dry friction clearances and lubrication clearances on output response of mechanism. The influence of clearance value, lubrication viscosity and driving speed on dynamic response are analyzed. The influence of clearance value and driving speed on nonlinear characteristics of mechanism are analyzed by means of Poincare mapping, phase and bifurcation diagram. The research provides theoretical references for prediction and control of dynamic performance for mechanism with clearance.

비공식 및 공식 관계적 지배장치가 공급사슬 파트너십에 미치는 영향에 관한 연구

민순홍(Soonhong Min),남현정(Hyunjeong Nam),임수빈(Subin Im) 한국생산관리학회 2013 韓國生産管理學會誌 Vol.24 No.3

Relational governance mechanism, unlike contractual governance mechanism, plays an important role in safeguarding interfirm partnerships in supply chain management. Extant literature considers trust as the single most important form of relational governance mechanism. However, it may be problematic to regard trust as the most effective relational governance mechanism due to (1) the mixed findings about the nature of trust: the locus of trust (within a firm vs. within a bilateral relationship), the effectiveness of trust on predicting and controlling future opportunistic behaviors, and the role of trust (antecedent vs. outcome of the partnership), and (2) the potential, boomerang effect of a high level of trust against the partnership. The purpose of this study is to propose two relational governance mechanisms (i.e., informal and formal relational governance mechanisms) as complements to trust that may not be effective at a certain point during the process of developing, maintaining, and enhancing partnership, and empirically test the effect of these two mechanisms on supply chain partnership. In particular, the main focus of this study lies on testing the mediating effect of formal relational governance mechanism on the relationship between informal relational governance mechanism and supply chain partnership. The empirical results from statistical tests confirmed that (1) informal relational governance mechanism is a second-order construct that consists of two first-order constructs, top management’s relational orientation and relational norms, (2) formal relational governance mechanism is a second-order construct that comprises two first-order constructs, shared vision/goals and shared leadership, (3) informal relational governance mechanism has a positive effect on formal mechanism, which in turn has a positive effect on supply chain partnership, and (4) formal relational governance mechanism fully mediates the relationship between informal relational governance mechanism and supply chain partnership. 기업 간 관계적 지배장치(relational governance mechanism)는 계약적 지배장치(contractual governance mechanism)와 다르게 비공식적이고 관계지향적인 지배양식이 기업 간 거래의 안전장치 역할을 하는 것으로써, 특히 신뢰가 대표적인 관계적 지배장치로 간주되어 왔다. 그러나 (1)신뢰의 소재지(한 기업 혹은 상호 관계), 기회주의적 행동에 대한 예측 정확도 및 통제의 효과성, 신뢰의 성격(파트너십의 선행 혹은 후행 변수)에 대한 다양한 견해가 존재하고, (2)높은 수준의 신뢰가 가져오는 순효과와 함께 역효과가 보고되고 있는 점을 고려하면 신뢰를 공급사슬 파트너십 전(全)과정을 관리하는 데 항상 효과적인 관계적 지배장치로 간주하는 것은 논란의 여지가 있다. 이러한 신뢰의 효과성에 대한 합리적 의심을 바탕으로 본 연구는 신뢰를 보완할 수 있는 비공식 관계적 지배장치(informal relational governance mechanism)와 공식 관계적 지배장치(formal relational governance mechanism)를 제안하고, 그 두 장치들이 공급사슬 파트너십에 미치는 역할을 실증하였다. 특히 공식 관계적 지배장치가 비공식 관계적 지배장치와 공급사슬 파트너십의 관계를 매개할 것인가에 연구의 중점을 두었다. 본 연구 분석 결과에 따르면 첫째, 비공식 관계적 지배장치는 개별 기업 최고경영진의 관계지향성과 관계협력규범이라는 두 개의 1차 요인으로 구성된 2차 요인이며, 공식 관계적 지배장치는 기업 간 합의된 비전/목표, 합의된 리더십이라는 두 개의 1차 요인으로 구성된 2차 요인임을 확인하였다. 둘째, 비공식 관계적 지배장치, 공식 관계적 지배장치, 파트너십 간 관계를 규명함에 있어서, 비공식 관계적 지배장치는 공식 관계적 지배장치에 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 공식 관계적 지배장치는 공급사슬 파트너십에 정(+)의 영향을 미치는 것으로 나타났다. 넷째, 비공식 관계적 지배장치는 공식 관계적 지배장치를 통해서만 간접적으로 공급사슬 파트너십에 영향을 미치는, 공식 관계적 지배장치의 완전매개 효과를 확인하였다.

자아방어기제와 전치적 강박소비행동에 관한 연구

한성희 한국소비문화학회 2020 소비문화연구 Vol.23 No.2

This study aims to analyze the influential relationship between the ego defense mechanism and the displacive compulsive consumption behavior. Displacement refers to the act of transferring and expressing the emotions felt toward a certain subject to a less important and less threatening alternative subject. On the other hand, displacive compulsive consumption behavior refers to the transfer seen in displacement and the attachment toward the substitute subject, which is continuously and repetitively emerging in the form of compulsive consumption. The activation of the ego function and its mechanism forms the intrinsic ego of an individual, and if change and enhancement on the intrinsic ego are necessary, greater attention should be placed on the mechanism of the ego function and habituated mechanism. Given this, the study attempts to identify the influence that the ego defense mechanism has on the displacive compulsive consumption behavior and seeks a desirable ego defense mechanism that improves the compulsive consumption behavior. The subjects of this study include a group of consumers in their 20s–50s residing in Seoul and other metropolitan areas, of which a total of 378 were chosen to undergo the analysis. For the method, descriptive statistics, factor analysis, variance analysis, and regression analysis were used. The analysis result and its implications are as follows. First, two factors of the displacive compulsive consumption behavior were identified through the factor analysis (Varimax method). Factor 1 is “anger transfer type compulsive behavior,” which is expressing one’s negative emotions in the form of compulsive consumption behavior. On the other hand, Factor 2 is “substitute subject attachment type compulsive behavior,” which is transferring affection toward a certain subject to a substitute subject or object. Second, the ego defense mechanism consists of neurotic, narcissistic, immature, and mature defense mechanisms. Neurotic defense mechanism was classified into reaction-formation, controlling, rationalization, and dissociation factors; narcissistic defense mechanism was categorized into projection and denial factors; immature defense mechanism was classified into passive- aggression, somatization, acting out, regression, evasion, and identification factors; and mature defense mechanism was categorized into suppression, anticipation, sublimation, altruism, and humor factors. Each defense mechanism showed significant differences by consumer groups in accordance with sociodemographic factors. Third, regression analysis was conducted to analyze the relative influence of the factors that impact the displacive compulsive consumption behavior. Differences were found in the factors influencing the anger transfer type compulsive behavior and substitute subject attachment type compulsive behavior. The factor with the strongest influence on “anger transfer type” was “regression,” followed by “sublimation” and “reaction-formation,” which had a significant influence. As for the “substitute subject attachment type,” the “identification” factor had the biggest influence, followed by regression, evasion, reaction-formation, humor, and rationalization. Such study results suggest that focus should be placed on the ego function to further understand and manage the displacive compulsive consumption behavior. Therefore, the study proved to be helpful in analyzing the ego function influencing compulsive consumption behaviors by each ego defense mechanism and, in turn, supplied basic data necessary to ease compulsive consumption. Future studies could focus on the analysis of the process of controlling the ego defense mechanism to handle anger transfer type and substitute subject attachment type compulsive consumptions. 본 연구는 전치적 강박소비행동과 자아방어기제간의 영향관계를 분석하기 위해 실시되었다. 전치적 강박소비행동은 전치에서 볼 수 있는 전이와 대리대상에 대한 애착이 지속적이고 강박적인 소비행태로 나타나는 것이다. 조사대상은 서울과 수도권 지역에 거주하는 20-50대 소비자로, 최종 378명이 분석대상이 되었다. 연구방법은 기술통계, 요인분석, 위계적 회귀분석이 사용되었다. 분석결과 및 시사점은 다음과 같다. 첫째, 전치적 강박소비행동은 요인분석(Varimax방식)을 통해 2개의 요인으로 분류되었다. 요인 1은 ‘분노전이형 강박소비’, 요인 2는 ‘대리대상 애착형 강박소비’이다. ‘분노전이형’강박소비는 자신의 부정적인 감정을 강박적인 소비행동으로 표현하는 것이다. ‘대리대상애착형’강박소비는 원래의 대상으로 향하는 애정을 대리대상이나사물에게 전이시키는 것이다. 둘째, 자아방어기제는 신경증, 자기애, 미성숙, 성숙의 방어기제로 4가지 요인으로 분류되었다. 신경증적 자아방어기제는 반동형성, 통제, 합리화, 해리, 자기애적 방어기제는 투사와 부정 요인으로 분류되었다. 미성숙한 방어기제는 수동공격, 신체화, 행동화, 퇴행, 회피, 동일시 요인, 성숙한 방어기제는 억제, 예견, 승화, 이타주의, 유머 요인으로 분류되었다. 셋째, 전치적 강박소비행동에 미치는 요인의 상대적 영향력을 분석한 결과, 분노전이형과 대리대상애착형 강박소비행동에 영향을 미치는 요인에는 차이가 있었다. ‘분노전이형’에 가장 큰 영향력을 보인 요인은 ‘퇴행’이었고, ‘대리대상 애착형’에는 ‘동일시’요인이 가장 큰 영향력을 보였다. 이와 같은 연구결과로써, 전치적 강박소비행동을 적정화하기 위해서 자아기능에 주목하고 통찰할 수 있어야 할필요성이 시사되었다. 본 연구는 강박소비행동을 비합리적인 소비행동으로 지적하는 관점에서 벗어나 새롭게 유형을 구분하고 자아방어기제의 영향력을 규명하여 소비행동모델을 정교화하여 해석의 패러다임을 전환하였다는점에서 의의가 있다.

실버세대의 외식상품 지속사용결정요인에 관한 연구

윤영일 ( Yeoun Gil Yoon ),박은아 ( Eun A Park ) 관광경영학회 2014 관광경영연구 Vol.62 No.-

This study is to examine the mechanism in the comprehensive frame of theoretical basis how the silver customers with great purchasing power in the food service industry can use the food services continuously without leaving it. In this study, silver generation`s continuous intention to use food products has received great attention and antecedents of silver generations` continuous intention to use have focused two crucial factors: dediction-based mechanism and constraint-based mechanism. Although both dediction-based mechanism and constraint-based mechanism induced continuous intention to use food products, the mechanism of these two factors are severely different. Dediction-based mechanism represents that silver generations are pleased with consumption related fulfillment and therefore willing to use food products continuously, while constraint-based mechanism makes silvers to use food products continuously even though they do not want to use it. In other words, satisfaction and expectation confirmation represent dediction-based mechanism, while switching costs and alternative attactiveness represent constraint-based mechanism. Dediction-based mechanism and constraint-based mechanism have been identified in the food marketplace. However, there has not been and integrated framework to explain these two mechanisms in the food marketplace. In addition, it is not enough to simply explain silver generations` continuous to use with dediction-based mechanism and constraint-based mechanism.

소비욕망의 구매로의 전환기제 연구

이준영,김난도 한국소비자정책교육학회 2011 소비자정책교육연구 Vol.7 No.4

본 연구는 먼저 심리적인 소비욕망이 실제의 구매로 전환되는 심리적 과정을 이론적으로 모델화하여 살펴보았 다. 이를 위해 기존의 소비욕망에 대한 여러 이론과 모델들을 분석하여 소비욕망-구매 전환모델을 도출하였다. 소비욕망-구매 전환모델은 소비욕망에 관한 기존 이론과 모델들에서 나타나는 갈등성과 역동성의 측면에 초점을 맞추어서 인지부조화이론과 인지균형이론의 논리적 결합과 적용을 통하여 도출하였다. 소비욕망과 소비제어의 갈 등상태는 인지부조화이론을 적용하여 설명하였고, 소비욕망과 소비제어의 인지부조화적 갈등상태가 역동적 과정 을 통해 조화․균형 상태로 변동되는 과정과 기제는 Heider의 인지균형이론을 통해 설명하였다. 구체적으로 이러한 변동 과정은 구매로의 촉진기제와 비구매로의 촉진기제로 나뉘어진다. 구매로의 촉진기제에 는 소비욕망 강화와 소비제어 약화의 기제가 있고, 비구매로의 촉진기제에는 소비욕망 약화와 소비제어 강화의 기제가 있다. 전자는 소비욕망을 합리화, 정당화시키거나 소비제어를 중화, 해제시킴으로써 구매로 연결되는 반 면, 후자는 소비제어를 강조, 환기하거나 소비욕망 자체를 축소, 감소시킴으로써 비구매로 연결된다. 이러한 이론적 모델화를 토대로 구체적인 실증 조사를 하였다. 도출된 결과에 대해 구체적으로 살펴보면, 구매 로의 촉진 기제로서 소비욕망 강화의 기제에는 이익-비용 프레이밍, 필요강조, 자격부여, 의례 강조, 비구매 후회 등이 있었고, 소비제어 약화의 기제에는 이타성 강조, 검약성 강조, 가격 할인, 기존 소비물 처분 등이 있었다. 비구매로의 촉진 기제로서 소비제어 강화의 기제에는 죄책감 형성, 구매 후회, 타인에 의한 통제, 소비목록 충돌, 저축 강조, 지출 모니터링 등이 있었고, 소비욕망 약화의 기제에는 자극회피, 실용성 강조, 대체품 구매, 관심 전 환 등이 있었다. 연결망 분석을 통해 구매전환기제의 연결 구조를 분석한 결과, 구매로의 촉진 기제의 연결망은 비교적 단순한 단선적 구조로 되어 있는 반면 비구매로의 촉진 기제의 연결망은 비교적 복잡한 거미줄망의 구조로 되어 있었다. 구매로의 촉진기제에서 가장 두드러지게 나타난 것은 필요강조의 기제였고, 비구매로의 촉진기제에서 가장 강도 가 강하게 나타난 것은 죄책감형성의 기제였다. This study analyzed the psychological process from consumption desire into purchase. For this purpose, I analyzed several theories and models on consumption desire and drew a model of transition from consumption desire to purchase. The desire-purchase model was structured by logical combination and application of cognitive dissonance theory and cognitive balance theory, after reflecting on the conflicts and dynamics in the existing theories concerning consumption desire. Cognitive dissonance could explain the conflict of consumption desire and consumption control. Heider's cognitive balance theory could explain the process and mechanism of how the conflict of cognitive dissonance status turns into well harmonized and balanced status through dynamic process. Specifically, this process of transition can be divided into two mechanism: purchasing facilitation and non-purchasing facilitation. Purchasing facilitation mechanism consists of the mechanism of strengthening consumption desire and the mechanism of weakening consumption control. Non-purchasing facilitationmechanism, on the other hand, consists of the mechanismof strengthening consumption control and the mechanism of weakening consumption desire. On the one hand, the former leads to purchasing by rationalizing and justifying consumption desire, and neutralizing and dissolving consumption control. While, the latter ends up with non-purchasing by emphasizing and awakening consumption control, and reducing consumption desire. The detailed results of the investigation show that the mechanism of strengthening consumption desire as a purchasing facilitator contains benefit-cost framing, necessity emphasis, entitlement, emphasis of ritual, and non-purchasing regret. The mechanism of weakening consumption control includes an emphasis on altruism, an emphasis on economy, price discount, and the disposal of existing consumption objects. The mechanism of strengthening consumption desire as a non-purchasing facilitation mechanism includes guilty feeling, purchasing regrets, control by others, conflict of purchasing list, emphasis on saving money, and monitoring of expenses. The mechanism of weakening consumption desire includes avoidance of stimulation, emphasis on practicality, purchasing of substitution, and distraction. The result of network analysis on network structure of purchasing transition mechanism showed that the network of purchasing facilitation mechanism simply had a single line structure while non-purchasing facilitation mechanism had relatively complicated spider web structure. This indicates that consumers can turn their consumption desires into purchase with one or two simple rationalization or justification, while the control of consumption desire requires various strategies at a time. This study has its significance in analyzing the essential causes that drive consumption and decision making process, starting from some fundamental and philosophical questions on consumer as a human being, by adopting the concept of consumption desire and applying into consumer studies. This study explained the fundamentals of desire toward consumption behavior and dynamic psychological process toward purchasing based on its in-depth investigation and research on human desire. In particular, this study adopted various consumer research techniques that can investigate depth psychology, so that it provides the basis for future researches on the motivations of consumption in depth. The Desire-purchase model that this study introduced is a consumer decision making model that considers both consumption desire and consumption control. This model provides logical reasoning on psychological complication and dynamic psychological process between consumption desire and consumption control based on the process where internal consumption desire turns into actual purchasing. Finally, this study will contribute to researches on consumer studies to find out consumption motivations and to widen research methods and subjects of consumer study as it tried to conceptualize and analyze the abstract concept of consumption desire objectively

Organizational-Economic Mechanism of Providing Sustainability of the Region's Development Based on the Impact of the Potential-Forming Space in the Conditions of the Creative Economy Formation

Khanin, Semen,Derhaliuk, Marta,Arefieva, Olena,Murashko, Mykola,Nusinova, Olena International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.2

The article is devoted to substantiation of theoretical and methodical bases of formation of the organizational-economic mechanism of maintenance of stability of development of region on the bases of influence of potential-forming space in the conditions of formation of creative economy. It was found that the organizational-economic mechanism due to its multifaceted nature does not have a single generally accepted definition, and its acceptable scale and complexity is reflected in the structure, which is very dependent on the scope and conditions of its application, can be very different and contain different elements. In view of this, in order to highlight the characteristics that are inherent in the organizational-economic mechanism of sustainable development of the region on the basis of potential-forming space in the formation of creative economy, the article examines the properties and characteristics of direct organizational and economic mechanism. The necessity of basing the process of formation of any organizational-economic mechanism, including the organizational-economic mechanism of ensuring the sustainability of the region on the basis of the potential-forming space in the conditions of creative economy on the system of principles. In this context, the author's vision is proposed and a set of principles for the formation of organizational-economic mechanism for sustainable development of the region on the basis of the potential of the potential-forming space in the creative economy, as well as revealed the essence of each. According to the structural aspect, the organizational-economic mechanism of ensuring the sustainability of the region's development on the basis of the potential-forming space is proposed to be presented as a set of seven stages, which are implemented in a certain sequence. Within the limits of this research the sequence of realization of the stages making process of formation of the organizational-economic mechanism of maintenance of stability of development of region on the basis of influence of potential-forming space in the conditions of formation of creative economy is defined and their maintenance and essence is presented.

Thermal-mechanical coupling analysis and experimental study on CNC machine tool feed mechanism

Shihao Liu,Mao Lin 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.20 No.6

As the CNC machine tool feed mechanism is affected by joint action of heat and load during the working process, thermal–mechanical coupling analysis and experimental research on CNC machine tool feed mechanism are conducted. On the basis of exploring the thermal–mechanical coupling effect of CNC machine tool feed mechanism, a thermal–mechanical coupling dynamic analysis method is proposed through combining multi-step finite element simulation with temperature field experiment.According to the proposed method, the transient and steady-state simulation analysis on CNC machine tool feed mechanism are conducted and conclusions obtained are as follows, before the whole feed mechanism reaches thermal balance state, the thermal–mechanical coupling effect makes the deformation of the feed mechanism increase with the temperature rising. The correctness of the proposed thermal–mechanical coupling dynamic analysis method was verified by the contrastive analysis of the experiments. Therefore, in the process of CNC machine tool feed mechanism’s analysis and design, the influence of thermal–mechanical coupling effect on dynamic performance should be considered.

On the Design of the Latch Mechanism for Wafer Containers in a SMIF Environment

Jyh-Jone Lee,Dar-Zen Chen,Wei-Ming Pai,Tzong-Ming Wu 대한기계학회 2006 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.20 No.12

This paper presents the design of a latch mechanism for wafer containers in a standard mechanical interface environment. For an integrated circuits fabrication factory, the standard mechanical interfaced wafer container is an effective tool to prevent wafers from particle contamination during wafer storage, transporting or transferring. The latch mechanism inside the container door is used to latch and further seal the wafer container for safety and air quality. Kinematic characteristics of the mechanism are established by analyzing the required functions of the mechanisms. Based on these characteristics, a methodology for enumerating feasible latch mechanisms is developed. New mechanisms with one degree-of-freedom and up to five links are generated. An optimum design is also identified with respect to the criteria pertinent to the application. The computer-aided simulation is also built to verify the design.

SPIRA: Screw Wheel-Based Mobile Robot for Switching Primitives

ChangKook Seo,DongHan Son,KyungUk Lee,KyoungMin Ko,JongMyeong Lee,TaeWon Seo 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.25 No.2

In this study, we propose a novel movement mechanism for a mobile robot that combines screw-based and general wheel-based mechanisms via switching. As mobile robots developed, their areas of activity gradually expanded to environments including rough terrain such as granular surfaces. Accordingly, the need for a suitable movement mechanism in an environment in which a general rigid surface and a granular surface are combined has increased. To address the limitations of existing movement mechanisms, we develop a switching mechanism that combines a screw-based wheel mechanism that is optimized for rough terrain with general rigid-surface-based mechanisms that exhibit good driving performance. The two individual mechanisms are configured to be used according to the external environment using a switching mechanism. The validity of the proposed mechanism is verified through experiments conducted in a realistic setting using mobile robots. Experimental results show that granular surfaces that cannot be traversed using conventional wheels can be overcome through screw-based wheels through switching mechanisms. In summary, a switching mechanism combining screw-based wheels and normal wheels is presented as a movement mechanism capable of multi-locomotion not only on rough terrain but also on flat land.

Organizational-Economic Mechanism of the Development of the Agro-Industrial Complex in Modern Conditions

Ivanko, Anatolii,Vasylenko, Nataliia,Bushovska, Lesia,Makedon, Halyna,Dvornyk, Inna International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.2

The main purpose of this study is to substantiate the theoretical and methodological foundations of the organizational and economic mechanism of development of the agro-industrial complex in modern conditions. Organizational and economic mechanism is presented as a complex organizational structure of the system type, which is aimed at performing specific functions, the characteristic feature of which is the constant support of process changes without which the organizational and economic mechanism can not exist. There are four components of the agro-industrial complex, represented by agriculture and the national economy, which ensure its operation, including industry, processing of agricultural products, its storage and transportation, sale and repair and maintenance of agricultural machinery and more. It is proved that the organizational and economic mechanism of development of agro-industrial complex in modern conditions it is expedient to consider: from the point of view of system and process approaches; as a set of economic levers and organizational measures to influence the agro-industrial complex; constituent components of organizational influence on the development of the complex; a set of components, elements that are integrated into the system of economic relations of the subjects of the agro-industrial complex; a set of purposeful stimulators of agro-industrial complex development. The functions of the organizational component of the mechanism of agro-industrial complex include: redistributive, planning, interaction, control, integration and regulatory functions, the functions of the economic component include consumer, investment and innovation, social, incentive, monitoring functions of the mechanism. The symbiosis of the functions of organizational and economic components ensure the effectiveness of the organizational and economic mechanism of the organizational and economic mechanism through its functionalities as a whole.