• Korean Institute of Interior Design Journal
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• v.16 no.6
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• pp.77-85
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• 2007

The space where one's body lives is not only a space as the simple environment that is built with the physical factors, but also a space experienced by a movement accompanied by the concept of body perception including mental activities. In this study, the importance of the body is recognized and the meaning of the space of body perception including mental activities is understood. In this manner, the spatial unfolding phase and expression features are to be investigated through a standard of "What do they change?" by grasping those as a flexible space that changes spatial recognition. The following results have been drawn in this study; First, the application of the flexible concept in the space can give rise to the activities of an experiencing person in terms of being the object of spatial experience and appreciation. Also, the application changes a slightly static concept into a relative and dynamic space by introducing the movement. Second, the establishment of a space by a human's movement is accompanied by all perceptions and enables to perceive the space shape, the space itself and mutual communication between the spaces. Third, the expression of the human's movement in the fixed form of space lies in the extension of the fused spacial area with an observer beyond the physical spatial limitation. As human body intervenes in space, the meaning of the space has become more abundant and diverse and the space will be presented as the arena for sensitive and flexible communication as a responsive space that corresponds.

• Korean Institute of Interior Design Journal
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• v.20 no.3
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• pp.119-126
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• 2011

Recently, in the fields of fashion, advertisement, film, literature, philosophy, etc., the word, 'Nomad', is being used frequently across the overall society. The contemporary society is actively incorporating "nomadic thinking" as a new social phenomenon across the boundaries of conventional fields. This is not an exception in the field of space design. This study, via the contemporary nomadic thinking, examined the relationship between space design's application possibility as a new trend and flexible space; then categorized the characteristics of flexible space into flexibility, temporariness, changeability, and correlation; and then analyzed expression characteristics of flexible space. As for unrestricted expression of scene, it was recognized that separation of scene and space leads space to meet the needs of surrounding environment and users; formation of changeable space enables uses of space from various perspectives; and combining external factors (energy, media technologies) with space leads space to self-evolution. Space is perceived as an living organism that is flexibly corresponding, via realistic movement and virtual movement, to the indefinite, diversified thinking of the contemporary society. Therefore, this study illuminates that nomadic thinking has significance as basic thinking to predict development and characteristics of design thinking through understanding the contemporary society with the basic thinking system that has been inherent without restrictions of being fixed to the present, past, and future.

• 제어로봇시스템학회:학술대회논문집
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• 1994.10a
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• pp.117-122
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• 1994

In this paper, we discuss the modeling of flexible manipulators. In the modeling of flexible manipulators, there are two approaches: one is based on the distributed-parameter modeling and the other on the lumped-parameter modeling. The former has been applied to control and analysis of simple manipulator requiring precision, while the latter has been applied to multi-link spatial manipulator, because of the model's simplicity. We have already proposed the lumped-parameter modeling method for simple manipulator, and investigate that model of how much degree of precision we can get. The experiments and simulations are performed, comparing these results, the approximate performance of our modeling method is discussed.

• Korean Institute of Interior Design Journal
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• no.37
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• pp.21-28
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• 2003

Transformation of complexity and diverse life style of contemporary men have call for increase in demand of single's and couple's living space of one-room apartment. Feasibility for intensive use of one-room apartment, regardless of it's openness and flexible character, multiple function in a single concentrated room without privacy and lack of confrontation of the changes in diverse living pattern enhance uniformity which reflects as an essential problem. Therefore, this study is to present a direction of one-room apartment interior space planning to differentiate from the existing system of uniformity and it's problems. Within the concept of flexibility, establishment of the flexibility factors for the application of hinged system with a movable furniture to compose a flexible space. In conclusion, the applications of hinged system concept of sliding, folding, over-hangings, are applied in existing one-room apartment plan to enhance flexible space planning which to drive in motivation and adaptation of the dweller's life cycle.

• Korean Institute of Interior Design Journal
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• no.25
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• pp.11-17
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• 2000

The purpose of this study is to suggest a new system and standards of system furniture for promoting the efficiency of a l living space in order to cope with any possible change of a resident’s lifestyle. For this purpose, the study premises that the i idea of "flexibility" can provide a solution to problems with the resident’s current living space, and furthermore, it can fulfill the r resident’ s needs of a flexible living space. T To decide the needs of the flexibility of a living space, this paper examined and analyzed sever머 studies on the necessity of t the flexibility of a living space according to changes of one's lifestyle, characteristics and problems of each type of existing f furniture, and applications of each type of system furniture and it's flexibility. The results of this study is as follows: First, a new furniture system is necessary so that a resident can adjust one’s living space. Second, a plan for flexible interior s space can meet a current resident's demand of a flexible living space, not to mention an initial resident's .. Third, a systematic plan is needed to install system furniture in a living space to cope with changes of a resident’s lifestyle.s lifestyle.

• Journal of Institute of Control, Robotics and Systems
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• v.4 no.5
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• pp.644-650
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• 1998

In this paper , a state space model for flexible beam is presented using the assumed-modes approach. The state space equation is derived for a flexible beam in which one end is connected to a motor and is driven by a torque equation and the other end is free. Many of the transfer function proposed thus far use the torque to the flexible beam as the input and the tip deflection of the flexible beam as the output. The Technique for the analysis and synthesis of the dual-input describing function(DIDF) is introduced here and the construction of a non-linear compensator, based on this technique, is proposed. This non-linear compensator, properly connected in the direct path of a closed-loop linear or non-linear control system. The above non-linear network is used to compensate linear and non-linear systems for instability, limit cycles, low speed of response and static accuracy. The effectiveness of the proposed scheme is demonstrated through computer simulation and experimental results.

• Coupled systems mechanics
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• v.2 no.4
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• pp.303-327
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• 2013

The coupled free vibration of flexible structures and on-board liquid in zero gravity space was analyzed, considering the spacecraft main body as a rigid mass, the flexible appendages as two elastic beams, and the on-board liquid as a "spring-mass" system. Using the Lagrangians of a rigid mass (spacecraft main body), "spring-mass" (liquid), and two beams (flexible appendages), as well as assuming symmetric motion of the system, we obtained the frequency equations of the coupled system by applying Rayleigh-Ritz method. Solving these frequency equations, which are governed by three system parameters, as an eigenvalue problem, we obtained the coupled natural frequencies and vibration modes. We define the parameter for evaluating the magnitudes of coupled motions of the added mass (liquid) and beam (appendages). It was found that when varying one system parameter, the frequency curves veer, vibration modes exchange, and the significant coupling occurs not in the region closest to the two frequency curves but in the two regions separate from that region.

• Journal of Mechanical Science and Technology
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• v.17 no.12
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• pp.1912-1921
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• 2003

This paper presents a global mode modeling of space structures and a control scheme from the practical point of view. Since the size of the satellite has become bigger and the accuracy of attitude control more strictly required, it is necessary to consider the structural flexibility of the spacecraft. Although it is well known that the finite element (FE) model can accurately model the flexibility of the satellite, there are associated problems : FE model has the system matrix with high order and does not provide any physical insights, and is available only after all structural features have been decided. Therefore, it is almost impossible to design attitude and orbit controller using FE model unless the structural features are in place. In order to deal with this problem, the control design scheme with the global mode (GM) model is suggested. This paper describes a flexible structure modeling and three-axis controller design process and demonstrates the adequate performance of the design with respect to the maneuverability by applying it to a large flexible spacecraft model.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2002.11a
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• pp.189-194
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• 2002

This study aimed at the design trends and characteristics of flexible housing unit plan. In this paper, flexible unit plans of 256 examples that are constructed or will be constructed from 1991 to 2005 on the basis of the initial year of dwelling are analyzed. Divided into 60$m^2$, 85$m^2$, 102$m^2$, 135$m^2$, 165$m^2$ and above 180$m^2$ areas, kinds, characteristics and trend of planning of flexible housing unit plan are analyzed with the frequency and percentage method. The results of this study are as follows; 16 types of flexible kinds; room and living roon/room and room/room, room and living room. Since 2000, various types of flexible planning have came into existence (12 types of 16 types). 3bay is next to 4bay in number of flexible housing planning. There are R/L type in 3bay, R/L type and R/R types in 4bay. Flexible space organization is differentiated various types in R/L and public-private space has expanded in many ways.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.559-564
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• 1993

Nonlinear equation of motion of the flexible manipulator are derived by the Lagrangian method in symbolic form to better understand the structure of the dynamic model. The resulting equations of motion have a structure which is useful to reduce the number of terms calculated, to check correctness, or to extend the model to high order. A manipulator with a flexible 4 bar link mechanism is a constrained system whose equations are sensitive to numerical integration error. This constrained system is solved using the null space matrix of the constraint Jacobian matrix. Singular value decomposition is a stable algorithm to find the null space matrix.