• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.8
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• pp.678-687
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• 2012

The Fly-By-Wire(FBW) flight control system is essential to improve the stability and flying quality of the helicopter. Advanced aerospace companies, such as Bell-Sikorsky (USA) and NHI (European Consortium), have already applied the FBW flight control system to manufacture V-22 and NH-90 helicopters, respectively. This paper addresses the development of control law design using model inversion method improve the hover and low speed handling qualities of helicopter based on BO-105 model in 'Day' and 'Degraded visual environments(DVEs)' in accordance with ADS-33E-PRF. Design parameters are optimized to satisfy the handling qualities specification using Control Designer's Unified Interface (CONDUIT) commercial control law software. The result of the analysis based on CONDUIT and non-real time simulation in-house software, HETLAS (HElicopter Trim Linearization And Simulation) reveals that the provides an efficient mean to achieve Level 1 handling qualities.

• Transactions on Control, Automation and Systems Engineering
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• v.2 no.2
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• pp.92-97
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• 2000

The Lyapunov stability theorem is used to derive a control law that can be used to control the spacing between vehicles in a platoon. A third order system is adopted to model the vehicle and power-train dynamics. In addition, the concept of

• 제어로봇시스템학회:학술대회논문집
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• 1988.10b
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• pp.746-748
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• 1988

A way of improving the transient performance is suggested for a class of model reference adaptive control systems. To increase the convergence rate of a model following error, an error feedback term is incorporated into the control law.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2017.05a
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• pp.49-50
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• 2017

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.82.2-82
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• 2002

The new guidance law for a missile with the varying velocity after the rocket motor burned out is presented. This guidance is mechanized by combining the proportional navigation and the pure pursuit navigation. Some simulations are performed and then the simulation results show that the guidance law presented is effective even if the vehicle speed decreases significantly and has higher off-boresight ability than the proportional navigation.

• 제어로봇시스템학회:학술대회논문집
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• 1992.10a
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• pp.584-589
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• 1992

The 3-dimensional PPNG(Pure proportional navigation guidance) law was proposed about forty years ago, but the satisfactory analysis of its performance has not been presented since then. In this note, we prove under some reasonable assumptions that the missile guided according to this 3-dimensional PPNG law can always intercept a randomly maneuvering target if (1) the target acceleration varies with a certain bound, (2) the navigation constant is selected large and (3) the initial heading error is small. We introduce a Lyapunov-like method that proves to be a very powerful tool in obtaining our results.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.43 no.6
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• pp.497-506
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• 2015

A composite guidance law for impact angle control against nonstationary nonmaneuvering targets is proposed. The proposed law is based on the characteristics of proportional navigation and generates two kinds of guidance commands during the homing phase. The first command is to keep the desired look angle, and the second is to attack the target with impact angle constraint. The switch of guidance phases occurs when the specific light-of-sight(LOS) angle determined from the engagement information is satisfied. The calculation method of the maximum achievable impact angle is also proposed to design easily the desired impact angle within the missile capability. Numerical simulations are performed to investigate the performance and characteristics of the proposed law.

• Journal of Society of Preventive Korean Medicine
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• v.23 no.1
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• pp.15-26
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• 2019

Background and Aim : Health care and cosmetics as well as quality of life is now a matter of concern and many categories of complementary and alternative medicine fall into the territory of the medical practice of Korean medicine. Accordingly, penalties are being taken for unlicensed medical practices of Korean medicine in so called complementary and alternative medicine area. There is a possibility of violating the law for the public part because it is not clearly stipulated in the law as to what is a licensed medical practice. Materials and Method : The significance of the Medical Service Act and the Act on Special Measures for the Control of Public Health Crimes were reviewed, and the related supreme court cases were discussed upon the legal aspect of processing the unlicensed medical practice of Korean medicine. The legal information was provided from the National Law Information Center of the Ministry of Government Legislation, and the information websites of the Supreme Court and the Constitutional Court. Results : The concept of medical practice, which is essential in judging the case of unlicensed medical practice, is 'prevention and treatment of diseases through diagnosis, examination, prescribing, medication, or surgical procedures based on medical expertise', and the 'acts that may result in harm and injury of health unless performed by a medical person'. With respect to the medical practice of Korean medicine, the concept includes 'prevention and treatment of diseases using the principle of traditional Korean Medicine'. Conclusions : The concept of medical practice should be clearly stipulated in the law for the control over the unlicensed medical practices of Korean medicine. And it is important to move from the current concept of medical person-oriented medical practice emerging from the national system of healthcare control, to a concept that can accept the era of health managing-oriented medical environment and the co-governance of the healthcare providers and consumers for the future.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.533-539
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• 1993

In this paper, two side-attack guidance laws for an underwater vehicle are considered. In order to find the guidance command, we first make use of the optimal guidance law with terminal impact angle constraint. Secondly, the optimal solution of tracking problem is used. This paper shows some brief theory which is used in deriving the side-attack guidance laws, and the method of computing these guidance laws. Simulations on underwater vehicle for a constant moving target prove that the suggested side-attack guidance laws have enhanced side attack performance over the optimal guidance law with miss distance weighting only. Furthermore, from simulation results. we conclude that the guidance law using the optimal solution of tracking problem is more efficient for the side-attack guidance than the optimal guidance law with terminal impact angle constraint.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.446-449
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• 1997

We propose a control law in discrete time domain of the bilateral feedback teleoperation system using neural network and the reference model type of adaptive control. Different from traditional teleoperation systems, the transmission time delay irregularly changes. The proposed control method controls master and slave systems through identification of master and slave models using neural networks.