• International Journal of Automotive Technology
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• v.8 no.4
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• pp.477-481
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• 2007

In this article we present a new, reference model based, unified strategy for engine control. Three main modes are considered: first is the driver control mode where the driver controls the engine via the pedal position; second is the dashpot mode, that is, when the driver takes his foot off the pedal; and, lastly is the idle speed control mode. These modes are unified so that seamless transitions between modes now becomes possible. The unification is achieved due to the introduction of a reference model for the engine speed whereby only the desired engine speed is different for different modes while the structure of the control system remains the same for all the modes. The scheme includes an observer that estimates unknown engine load torque. A proof of robustness with respect to unknown load disturbances both within the operating modes and during intermode transitions is given.

• Journal of the Korean Home Economics Association
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• v.34 no.5
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• pp.265-282
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• 1996

This study investigated the relation between parents' verbal control modes and children's maladjustment. The subjects were 445 mothers and their children of sixth grade in elementary schools located in Seoul. To assess the parents' verbal control modes, questionnaire developed by Lee Kyung Hee(1993) was used. The modified version of Achenbach and Edelbrock's CBCL(Child Behavior Checklist) was administered to assess the children's maladjustment. The results were as follows : 1)Significant differences were found in parents' verbal control modes in terms of children's sex difference and social status level. 2) Significant differences were found in children's maladjustment in terms of children's sex difference and social status level. 3) There was a significant correlation between father's verbal control modes and children's maladjustment. Children's maladjustment was related positively to imperative mode and negatively to the person-oriented and position-oriented modes. The best variable explaining girl's maladjustment was father's position-oriented modes. 4) The negative impact of father's imperative mode in combination with the mother's imperative mode on the children's adjustment was greater than other combinations of the father and mother's verbal control modes.

• Journal of Families and Better Life
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• v.26 no.3
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• pp.191-201
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• 2008

This study examined how preschool children's age and mothers' modes of verbal control affect children's lying. A sample of 108 preschool children aged from 3 to 6 participated in a lying experiment. Their mothers answered questionnaires regarding the mothers' modes of verbal control. Preschool children's lying was measured by the Guessing Game Experiment developed by Talwar and Lee(2002). Mothers' modes of verbal control were measured by Jung's(2005) scale for preschool children. To analyze the data, crosstabs and logistic regression analyses were conducted. The results of the experiment showed that three-year-old children are able to lie intentionally. The older preschool children lied more than the younger ones. Mothers' imperative and personal modes of verbal control were positively related to preschool children's lying. The most significant variable on preschool children's lying was mother's imperative modes of verbal control, followed by personal modes of verbal control, which emphasizes the crucial influence of parenting on preschool children's lying.

• Journal of the Korean Home Economics Association
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• v.32 no.5
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• pp.109-124
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• 1994

The present study was conducted to elucidate the relationship between parent's verbal control modes and children's social competency. Two questionanires were developed by the authors for this study. The questionnaire for measuring parent's verbal control modes was composed of 84 and 87 items for mother and father, respectively, which assesses three types of verbal control modes; imperative control position-oriented control and person-oriented control. The questionnaire for measuring children's social competency perceived by mothers was composed of 27 items, which assesses four areas of social competency; initiative sociability responsibility and self-disclosure. the subjects of this study were 436 mothers and their children of fifth and sixth grade in elementary schools located in Seoul. The results of this study were as follows: 1) Parents control their children mostly by position-oriented mode and least by imperative mode. 2) There were significant correlations between father's verbal control mode and children's social competency. children's social competency was related positively to the person-oriented and position-oriented modes but negatively to the imperative mode. The best variables explaining boy's social competency were father's imperative and position-oriented modes whereas that for girl's was position oriented mode. 3) Mother's verbal control mode was not significant in explaining children's social competency. 4) The negative impact of father's imperative mode in combination with the mother's person-oriented mode on the children's social competency was greater than other combinations of father's and mother's verbal control modes.

• Structural Engineering and Mechanics
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• v.29 no.5
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• pp.489-504
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• 2008

In piezoelectric flexible structures, the contribution of vibration modes to the dynamic response of system may change with the location of piezoelectric actuator patches, which means that the ability of actuators to control vibration modes should be taken into account in the development of modal reduction model. The spatial $H_2$ norm of modes, which serves as a measure of the intensity of modes to system dynamical response, is used to pick up the modes included in the reduction model. Based on the reduction model, the paper develops the state-space representation for uncertain flexible tructures with piezoelectric material as non-collocated actuators/sensors in the modal space, taking into account uncertainties due to modal parameters variation and unmodeled residual modes. In order to suppress the vibration of the structure, a dynamic output feedback control law is designed by imultaneously considering the conflicting performance specifications, such as robust stability, transient response requirement, disturbance rejection, actuator saturation constraints. Based on linear matrix inequality, the vibration control design is converted into a linear convex optimization problem. The simulation results show how the influence of vibration modes on the dynamical response of structure varies with the location of piezoelectric actuators, why the uncertainties should be considered in the reductiom model to avoid exciting high-frequency modes in the non-collcated vibration control, and the possiblity that the conflicting performance specifications are dealt with simultaneously.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.245-248
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• 1997

The control modes used in teleoperation are position control mode, and rate control mode. This paper presents the problems of the conventional control modes, through simulation, proposes an intelligent mixed control mode that converts the operation mode between the position mode and the rate mode intelligently by judging the operator's intention using the real-time measurement data. The effectiveness of the proposed intelligent mixed control mode is demonstrated and compared to other typical control modes through simulation and actual experiment.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.2566-2569
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• 2003

An alternative optimal control law formulation is introduced and compared with two different control law, a conventional linear quadratic regulator and the control law based on game theory. This formulation eliminates the undesired modes of the system by the projection of a controller onto the subspace orthogonal to that of the bad modes. In conventional LQR control law, the control performance can be improved only by using proper weighting matrices in performance index, normally, with high cost. The control law formulation by game theory may provide various ways to obtain the desired performance. The control law modified by the elimination of bad modes provides efficient ways to get rid of an undesired performance since it eliminates the exact modes which cause the bad control performance.

• The Korean Journal of Community Living Science
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• v.26 no.2
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• pp.249-259
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• 2015

This study examines the effects of parental leadership and verbal control modes on preschool children's leadership. The sample included 202 children between the ages of 4 and 5 and their mothers, and data were collected using an index of parental leadership, an index of parental verbal control, and an inventory of preschool children's leadership. A statistical analysis was conducted using a t-test, a correlation analysis, and a multiple regression analysis. According to the results, there were significant differences in preschool children's leadership according to the child's age. According to a correlation analysis, parental leadership and verbal person-oriented control modes had significant positive correlations with preschool children's leadership, and imperative control and position-oriented control modes had negative correlations. In addition, parental leadership and verbal control modes were significant predictors of preschool children's leadership. In particular, parents' communication skill, relationship skill, group activity skill, person-oriented control mode, and position-oriented control mode were significant predictors of preschool children's leadership.

• Journal of the Korean Home Economics Association
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• v.37 no.5
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• pp.49-60
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• 1999

This study investigated the relationship between mother's verbal confrol modes and children's emotional anxiety. The subjects of this study were 157boys and 144 girls attending elementary schools in Busan. Lee Kyung-Hee's(1993) questionnaire on mother's verval control modes, and Kang's(1986) questionnaire on emotional anxiety were used. The results were as follows: 1) There were significant differences in boys and girls about mother's imperative control mode. and children's emotional anxiety. Boys got the higher scores than the girls in mother's imperative control modes. But Girls got the higher score than the boys in children's emotional anxiety. 2) Only for boys, There were significant correlations between mother's imperative control mode and children's emotional anxiety. 3) Sex variabl and mother's imperative control mode variables were the predictor influencing on children's emotional anxiety. That is, girls shown higher emotional anxiety than boys. And children shown higher imperative control get higher emotional anxiety score.

• Journal of the Korean Institute of Telematics and Electronics
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• v.23 no.2
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• pp.189-196
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• 1986

Linear second-order matrix systems representing dynamics of large flexible structures are recast in a state space form. By can efficient partial decoupling technique, a few of low frequency modes are decoupled from the rest of modes, and an optimal control procedure is developed in such a way that damping is added to the selected modes without control spillover to uncontrolled modes. Since the partial decoupling requires only eigenvectors of the sected modes, the computing time can be reduced significantly in large systems. Therefore, the method of partial decoupling and control developed in this work may be applicable to vibration contorl of large flexible space structures.