• Title, Summary, Keyword: Attitude

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Influence analysis of the guidance commands on attitude stability of a launch vehicle (회전운동을 고려하지 않고 유도된 유도지령이 발사체의 자세안정성에 미치는 영향분석)

  • 최재원;이장규
    • 제어로봇시스템학회:학술대회논문집
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    • pp.469-473
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    • 1992
  • The conventional closed-loop guidance commands are generated from a simplified point mass model for real time operations. In real situations, the generated guidance commands are applied to the original rigid body. This can cause attitude instability of the vehicle. In this paper, in order to solve the attitude instability problem in the guidance system sense, the influence of the guidance commands on a launch vehicle attitude is derived quantitatively. The checking method of the attitude stability conditions that uses Liapunov theorem is proposed, and the attitude stabilizing method is also proposed. The attitude stability is accomplished by subtracting the influence of the guidance commands that destabilize the vehicle attitude. The closed-loop guidance commands generated from the simplified point mass model may destabilize the vehicle attitude, which is verified through simulations. In this case, the vehicle attitude can be always stabilized with the proposed attitude stabilizing method without additive fuel consumption.

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The Impact of Website Advertisement on Department Stores (백화점 쇼핑몰의 웹사이트 광고에 대한 영향 연구)

  • Chun, Tae-Yoo;Park, No-Hyun
    • Journal of the Korean Society of Costume
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    • v.57 no.4
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    • pp.95-109
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    • 2007
  • After defining the determining factor of an attitude on clothing web-site as cognitive responses and affective responses, this study was to investigate how it affects against web-site attitude, brand attitude and purchase intention. To accomplish research subject, this study had an analysis on web-site attitude, brand attitude and purchase intention after selecting 3 department stores having mega fashion malls which run web-sites. Aad(Attitude toward an advertisement) was defined as cognitive responses and affective responses. This research analyzed it by multiple regression analysis after collecting a date from 265 customers who use 3 department stores selected The findings are as follows. First, Aad had a significance impact on web-site attitude across the department stores. Second, Aad had a significance impact on brand attitude across the department stores. Third, Aad had a significance impact on purchase intentions across the department stores. At the end of this paper, discussion, managerial implications, limitations, and future research directions were suggested.

Effect of Attitude towards Parent Brand on Extended Fashion Product in Fashion Brand Extension (패션브랜드 확장시 모브랜드에 대한 태도가 확장패션제품에 미치는 영향에 관한 연구)

  • Rhee, Young-Ju
    • Fashion & Textile Research Journal
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    • v.10 no.4
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    • pp.506-514
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    • 2008
  • The purpose of this study was to investigate the effect of attitude towards parent brand on extended fashion products in case of fashion brand extension. The subjects of this study were 386 college students and data were collected using survey questionnaire. For data analysis, factor analysis and path analysis were applied. The results showed that there were four factors (e.g., familiarity attitude, emotional attitude, value-expressive attitude, utility information attitude) in attitude towards parent brand and six factors (e.g., economical risk, utilitarian risk, social risk, psychological risk, time/advantage loss risk, risk for losing opportunity) under perceived risk in extended product. The results showed that attitude towards parent brand had a negative effect on perceived risk in extended products and had a positive effect on attitude towards extended products. Perceived risk in extended products then had a negative effect on purchase intention of extended products whereas attitude towards extended products had a positive effect on purchase intention of extended products.

Development of Quad-rotor with Anti-Windup Based PI controller and Hovering Attitude Control Flight Test (적분누적 방지기법 기반 자세제어기를 이용한 쿼드로터 개발과 호버링 자세 제어 비행 실험)

  • Park, Daejin;Park, Cheongeon;Lee, Sangchul
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.26 no.3
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    • pp.48-54
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    • 2018
  • This paper deals with a development of a quad-rotor for a hovering attitude control. First, a rotational dynamics are derived to design an attitude controller. The attitude controller is based on PI (Proportional-Integral) controller. For a stable attitude control, an anti-windup method applies to the PI attitude controller. Additionally, a complementary filter is used to obtain more reliable attitude. Gain values of the attitude controllers based on the anti-windup method are obtained through tests. Finally, the quad-rotor with the anti-windup based PI attitude controller is developed and a hovering attitude control flight tests are performed. As a result, the developed quad-rotor is capable of stable hovering.

A Study on Parenting Attitude of Juvenile Delinquent Parents (비행 청소년 부모의 양육태도 연구)

  • Kang, Young-Ja;Kim, Yun-Hee
    • Korean Journal of Human Ecology
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    • v.8 no.2
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    • pp.245-254
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    • 1999
  • The purpose of this study was to investigate parenting attitude of juvenile delinquent parents. The subjects ware 95 boys and 60 girls. According to the parenting attitude of juvenile delinquent on the ground of sex, fathers' parenting attitude showed connective relation with permissive and democratic attitude. Also in term of home environment, mothers' age, place of growth and fathers' job had the connection of overcaring. Though correlative with parenting attitude of juvenile delinquent, consistent parenting attitude was showed.

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Nonlinear Filtering Approaches to In-flight Alignment of SDINS with Large Initial Attitude Error (큰 초기 자세 오차를 가진 관성항법장치의 운항중 정렬을 위한 비선형 필터 연구)

  • Yu, Haesung;Choi, Sang Wook;Lee, Sang Jeong
    • Journal of Institute of Control, Robotics and Systems
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    • v.20 no.4
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    • pp.468-473
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    • 2014
  • This paper describes the in-flight alignment of SDINS (Strapdown Inertial Navigation Systems) using an EKF (Extended Kalman Filter) and a UKF (Unscented Kalam Filter), which allow large initial attitude error uncertainty. Regardless of the inertial sensors, there are nonlinear error dynamics of SDINS in cases of large initial attitude errors. A UKF that is one of the nonlinear filtering approaches for IFA (In-Flight Alignment) are used to estimate the attitude errors. Even though the EKF linearized model makes velocity errors when predicting incorrectly in case of large attitude errors, a UKF can represent correctly the velocity errors variations of attitude errors with nonlinear attitude error components. Simulation results and analyses show that a UKF works well to handle large initial attitude errors of SDINS and the alignment error attitude estimation performance are quite improved.

Derivation of Attitude Error Differential Equations by Platform Torque Commands (플랫폼 토크 명령에 의한 자세오차 미분방정식 유도)

  • 김갑진;송기원
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.7
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    • pp.556-562
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    • 2003
  • This paper presents new attitude error differential equations to define attitude errors as the rotation vector for inertial navigation systems. Attitude errors are defined with the rotation vector between the reference coordinate frame and the platform coordinate frame, and Platform dynamics to the reference coordinate frame due to platform torque command errors are defined. Using these concepts for attitude error definition and platform dynamics, we have derived attitude error differential equations expressed in original nonlinear form for GINS and SDINS and showed that these are equivalent to attitude error differential equations expressed in known linear form. The relation between attitude errors defined by the rotation vector and attitude errors defined by quaternion is clearly presented as well.

A Study on Information Attitude, Brand Attitude, Usage Satisfaction, Brand Image and Brand Loyalty of YouTube Sports Contents Viewer

  • Byun, Kyung-Won
    • International Journal of Internet, Broadcasting and Communication
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    • v.12 no.3
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    • pp.206-212
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    • 2020
  • The purpose of this study is to analyze the structural relationship among information attitude, brand attitude, usage satisfaction, brand image and brand loyalty of YouTube sports Contents. The survey subjects to achieve the purpose of this study were selected the 490 YouTube sports contents Viewer in the metropolitan area. Data processing was done with SPSS 23 for frequency analysis, Cronbach's α analysis. Also, AMOS 21 was used for confirmatory factor analysis and structural equation model analysis. The results of the analysis are as follows: First, it is more effective to increase the attitude toward the brand itself rather than information attitude to use satisfaction Second, both information attitude and brand attitude were found to have a positive effect on enhancing brand image. In relation to attitude and image, it was possible to achieve research accumulation for YouTube users. Third, it was found that both the use satisfaction and the brand image presented in the previous study had a positive effect on brand loyalty.

Adolescent Children및s Acceptance of Parents및 Attitude and Performance in Home Education (부모의 가정교육 태도 및 수행도와 청소년기 자녀의 가정교육 수용도)

  • 하상희;지금수
    • Korean Family Resource Management Association
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    • v.3 no.1
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    • pp.17-33
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    • 1999
  • The purpose of this study is to investigate the relationship between parents’attitude and their actual performance in home education and adolescent children’s acceptance, and to inquire the difference in relation to social-demographic variables with the subject of family with teenagers. The main results were as follows: 1) There were significant difference between father’s attitude and mothers in home education. And there were significant difference between father’s attitude and mothers according to variables in each area. 2) There were significant differences between father’s performance and mother’s in home education. 3) Adolescent children’s acceptance level was 3.26 (standard 5) and was average. there were significant differences in adolescent children’s acceptance level in accordance with parents’school careers, father’s job, child’s sex and school record. 4) There were relationships between parents’attitude and performance in home education when father’s attitude was confident attitude and situational attitude in education method, and when mother’s attitude was confident attitude. 5) There were relationships only when father’s attitude was confident attitude, and there were no relationships in other case. 6) There were relationships between parents’performance and adolescent children’s acceptance.

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Model analysis of slogan attitude, brand attitude, and brand recall of retail brands (유통 브랜드의 슬로건 태도, 브랜드 태도, 브랜드 회상 모형 분석)

  • Yoh, Eunah
    • The Research Journal of the Costume Culture
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    • v.21 no.3
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    • pp.338-347
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    • 2013
  • In this study, it was explored a research model consisting of slogan attitude, brand familiarity, brand attitude, brand recall, and product category recall of retailers. Experimental research was conducted with 3,028 males and females in their 20's to 40's using stimuli of 10 slogan-brand sets from various types of retailers. In results, the research model developed based on the literature was confirmed and supported by data. In the model test, all hypotheses were supported. The effects of slogan attitude and brand familiarity on brand attitude were confirmed. Also, brand familiarity affected brand recall. Category recall was predicted by brand attitude and brand recall. As consumers have better attitude toward slogans, they tend to have better attitude toward the brand. As consumers are more familiar with the brand, they are likely to better recall brands when they are exposed to the slogan. As consumers have better attitude toward brand and better recall the brand, they tend to better recall the business category when they see the slogan. Study findings may help marketers to develop better strategies for slogan use by considering diverse variables related to consumer responses toward slogan attitudes.