Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
ABSTRAK
A parallel optical switching system using array structure of planar microlens was developed. The optical switching device is much simpler and low costly compared with the electronic one because it is not necessary to convert optical signals to the electronics, execute the interchange and then reconvert back to optics. The concept of parallel optical switching is constructed by using array structure of planar microlens. Aligning on array form and making match between each lens input-output pairs of planar microlens array achieved parallel coupling of optical lines.

Two sliding mirror pairs functions as optical signal switch, four 2x2 planar microlens array for focusing and collimating elements, two pairs of solenoids as magnetically force sources and a microcomputer to run control mechanism automatically between IFO ports used, are being constructed to develop a new optical networking switch. This switching system is equipped with controlling mechanism of switching direction by microcomputer. It uses parallel port of a PC and an interface that changes parallel output of PC data into the condition of voltage and current needed by moving Unit.

(Solenoid). The switching performance was applied on transmission of digital modulated signal from signal generator and serial port of personnel computer. Using one input port and three output ports, the system perform four I/O ports of 2x2 parcel optical switching with 6,98 dB and 5,75 dB insertion losses for switched state and bypass state respectively and less than -- 57 dB cross talk obtained.

Abstrak :
Jaringan PSTN yang merupakan jaringan sirkit dan jaringan internet yang merupakan jaringan paket memiliki perbedaan karakteristik. Perkembangan jaringan paket yang begitu cepat memungkinkan komunikasi suara melalui jaringan paket dengan lebih murah dan dan layanan yang lebih. Sehingga kecenderungan di masa depan jaringan telekomunikasinya adalah jaringan paket atau gabungan jaringan paket dengan jaringan sirkit. Softswitch adalah suatu teknologi switching yang dapat memenuhi kebutuhan akan jaringan telekomunikasi masa depan. Softswitch dapat mengatur jaringan sirkit dan jaringan paket dalam satu jaringan yang terpadu.dengan menggunakan switching yang bersifat open architecture. Pada skripsi ini dilakukan pembahasan tentang teknologi softswitch dan kajian aplikasinya di Indonesia dengan membuat suatu rencana tahapan jaringan softswitch di Indonesia berdasarkan jaringan SS7 dari IN PT. TELKOM.

Abstrak :
A multi model predictive control and proportional-integral controller switching (MMPCPIS) approach is proposed to control a nonlinear distillation column. The study was implemented on a multivariable nonlinear distillation column (Column A). The setpoint tracking and disturbance rejection performances of the proposed MMPCPIS were evaluated and compared to a proportional-integral (PI) controller and the hybrid controller (HC). MMPCPIS developed to overcome the HC’s limitation when dealing with very large disturbance changes (50%). MMPCPIS provided improvements by 27% and 31% of the ISE (integral of square error) for feed flow rate and feed composition disturbance changes, respectively, compared with the PI controller, and 24% and 54% of the ISE for feed flow rate and feed composition disturbance change, respectively, compared with HC.