서지주요정보
고정층 반응기의 다변수 적응제어계 설계 = Design of a multivariable adaptive control scheme for a packed bed reactor
서명 / 저자 고정층 반응기의 다변수 적응제어계 설계 = Design of a multivariable adaptive control scheme for a packed bed reactor / 조원휘.
저자명 조원휘 ; Cho, Won-Hui
발행사항 [서울 : 한국과학기술원, 1983].
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소장정보

등록번호

4102059

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 8316

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초록정보

The multivariable adaptive control theory was applied to a packed bed reactor control system. The control system is 2x2 MIMO (multi-input multi-output) control system; input variables are space time (Δτ) and reactor wall temperature ($\Delta T_w$); output variables are reaction temperature ($\Delta T_i$) at various measuring points of a reactor bed and product yield (ΔY). The reaction is the partial oxidation of $n-C_4H_{10}$ (normal butane) to MA (maleic anhydride), which is highly exothermic. In case of such reactor control system, there exists a hot spot somewhere in the reactor bed which causes the reactor to be unstable or makes the catalysts deactivated and the system also shows direct transmission behavior in yield response to a step change in space time. Thus the hot spot temperature should be controlled not to exceed maximum allowable limit temperature and the product yield must be regulated not to influence next process stream, inspite of unpredictable changes in input variables or reactor system environments. There are two important problems which are emphasized in the design of MIMO adaptive control system, one is the selection of temperature sensor location, the other is the direct transmission response of ΔY to Δτ. Each problem was studied separately through $\Delta\tau-\Delta T_i$ and Δτ-ΔY SISO (single-input single-output) applications. And the results were combined to give MIMO adaptive control scheme for a packed bed reactor. The sensor location $z_i$ was also orthogonal collocation point of a reactor model, and hot spot temperature was calculated through Lagrange Interpolating Polynomial method with $z_1$, $z_2$, $z_3$ and $z_4$ as approximation points. simulation studies showed that the sensor location influenced control system performance seriously and $z_4$ was taken as a good sensor location. The direct transmission behavior was smoothed by passing ΔY through a low pass filter to produce filtered output $\Delta Y_F$, which resulted good control system performance. Consequently, the resulting MIMO adaptive control scheme showed good performances at wide operation range. SISO experiments were done with pilot plant scale packed bed reactor, further experiments in MIMO adaptive control system are required to confirm above simulation works.

서지기타정보

서지기타정보
청구기호 {MCE 8316
형태사항 viii, 92 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, 반응기제어장치의 상세도 및 반응기상수값. - B, Observability of 1st order hyp bolic system
저자명의 영문표기 : Won-Hui Cho
지도교수의 한글표기 : 정인재
지도교수의 영문표기 : In-Jae Chung
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 79-82
주제 Adaptive control systems.
충전탑. --과학기술용어시소러스
적응 시스템. --과학기술용어시소러스
Packed tower.
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