Il-Joo Shim

Adaptive repetitive control for an eccentricity compensation of optical disk drivers

This paper present an adaptive repetitive control scheme for optical disk drivers to track a periodic reference signal with dynamic change in period. Periodic disturbances can be adequately attenuated using the concept of repetitive control, provided the known period. Optical disk drivers support various speeds. So optical disk drivers have the varying periodic disturbance. To deal with time varying periodic disturbances, a proposed repetitive controller is turned based on repetitive control to change sampling frequency to follow the change of reference period The proposed adaptive repetitive control consists of two portions, the repetitive controller and the frequency multiplier, where the former uses a varying sampler operating at a variable sampling rate maintained at fixed multiple times of the disturbance frequency and the latter generate the vary sampling frequency based on the disturbance frequency. An adaptive repetitive control scheme is proposed, implemented on experimental set of an optical disk driver, and demonstrate the effectiveness of the proposed methods and the improvement of the random access time.

Performance evaluation of building network system integration using TCP/IP

~ system Integration is sign;ficant role in building. hecanse the inore h71ilding .sy.~teiii is integruted. the inwe they can save the niunugeinent ond energv C U S L Open protocol that guarantee iiiteroperahilin. is increasingli’ used to integrate the hnilding s):rfem. However. recenfls hailding auto,natioii .s.vstem i.s used together. with mans open protocolr (BAcnet, Lon Worky. ModBUS. etc) mid is i7eeded another network equipment for .system integration. Iniegration rising tliis eqiiipment is set u’ifli limifs. 111 this paper, we suggest the sclieine using on

Corrections to "Adaptive repetitive control for an eccentricity compensation of optical disk drivers"

TCP/IP as building s.v.sten7 intrgrution and show the po.s.sibi/in.’. Network Index Terms IBS, TCP/IP, Integration. Building

System integration using embedded web server and wireless communication

This paper presents an adaptive repetitive control scheme for optical disk drivers to track a periodic reference signal with dynamic change in period. Periodic disturbances can be adequately attenuated using the concept of repetitive control, when provided with the known period. Optical disk drivers support various speeds. So optical disk drivers have a varying periodic disturbance. To deal with time varying periodic disturbances, a proposed repetitive controller is turned based on repetitive control to change the sampling frequency to follow the change of reference period. The proposed adaptive repetitive control consists of two portions, the repetitive controller and the frequency multiplier, where the former uses a varying sampler operating at a variable sampling rate maintained at fixed multiple times of the disturbance frequency and the latter generates a vary sampling frequency based on the disturbance frequency. An adaptive repetitive control scheme is proposed, implemented on an experimental set of an optical disk driver. We have demonstrated the effectiveness of the proposed methods and the improvement of the random access time.

Separated ethernet algorithm for intelligent building network integration using TCP/IP

As the buildings become intelligent with the development of information communication, many facilities have appeared. Usually, each facility performed independent functions, but with the development of the internet, the facilities integrate with each other and perform various new abilities. At present, in order to offer linked service by integrating, PC servers are being used. However, the use of a PC server is expensive, consumes a lot of electricity and needs a lot of room. Therefore, this paper proposes the Embedded Web Server, which can substitute the existing PC server and control devices through the Web. Also, we propose integration through wireless communication, which can solve problems like complicating wiring and space restriction.

The architecture to implement the home automation systems with LabVIEW TM

Problems like poor security, transfer delay or packet loss occur while building network systems that are applied with TCP/IP integrate with data network systems. To solve this problem, this paper proposes the Separated Ethernet, which can give logically separation and priority to the system, and by using the OPNET Modeler simulator, we will verify its performances.

Meteorological phenomena measurement system using the wireless network

It becomes a topic that constructional environment could be controlled at any place and anytime in the ubiquitous era. It demands much expenses and technology to control everything. Therefore, we presented construct environment that could control home from outside using inexpensive USB web camera, we suggested that we could control it quickly by PDA. Proposed program could be used to many applications including home automation, monitor system and was verified through the experiment. [1] For implementation LabVIEWTM was chosen as software along with USB web camera and a wireless client (PDA).

Meteorological phenomena measurement system based on embedded system and wireless network

In this paper, we proposed a system of the weather disaster prevention in specific areas where the construction of the wire communication infrastructure is hard. This would be able to minimize the damage of men because the system has easiness of materialization with the existing wireless communication network, gets economic profits and can be set up in the back region such as a remote place, island so a person with a mobile terminal can receive a warning matter of the area he is in.

Implementation of smart home control using LabVIEW/sup TM/ and PDA

This paper aims at the reliable gathering of meteorological data of all the regions, by the use of wireless networks, in order to prevent meteorological disasters. For simple installation in areas like mountains, embedded system technology, which shows high performances and small sizes, to process the meteorological data.

Ethernet Algorithm for Building Network Integration Using TCP/IP

People want to control various facili1ie.s regard1e.ss locution in uhi9uitori.s era. Therefore we have a various devices embedded ~vire1es.s fcinctiuns. In t1ii.v paper we intplement a control program in U PDA that used Wireless LAN among wireless protocols. The objectives of this puper are: The ,f irst. to make a control program in server and a wireless client (PDA) rising WLAN The second, to implement smart home model. The third. to propose ri,sefril frinctions in I home control.^.^. Index Terms LabVIEW, LabVIEW PDA Module, PDA. Wireless Lan, WLAN, Smart Home, Ubiquitous.