Feedback Control of Distillation Columns by Double Differential Temperature Control

1969 ◽  
Vol 8 (4) ◽  
pp. 739-744 ◽  
Author(s):  
W. L. Luyben
Keyword(s):  
Feedback Control ◽  
Temperature Control ◽  
Distillation Columns

scholarly journals Optimal control of a bleed air temperature regulation system

2021 ◽  
Author(s):  
Lan Shang
Keyword(s):  
Feedback Control ◽  
Temperature Control ◽  
Output Feedback Control ◽  
Aircraft Engine ◽  
State Feedback Control ◽  
Temperature Control System ◽  
Regulation System ◽  
Air System ◽  
Control Response ◽  
Optimal State Feedback

This thesis investigates temperature control of an aircraft engine bleed air system, aiming at reducing ram air usage to reduce fuel consumption while maintaining fast temperature control response. To achieve both of the objectives, a system configuration is designed to control both ram air and bypass flows. The analytical equations describing the systems dynamics are derived and utilized in developing the overall bleed air system model. Optimal state feedback control and output feedback control are applied in the temperature control system. Computer simulations and experiments have been conducted, and the proposed configuration and control strategy are shown to be effective in minimizing ram air usage and maintaining fast temperature control response in the meantime.

Effective Derivation of Asymmetrical Temperature Control Schemes for Dividing-Wall Distillation Columns

2020 ◽  
Vol 59 (5) ◽  
pp. 2036-2048 ◽  
Author(s):  
Yang Yuan ◽  
Kejin Huang ◽  
Haisheng Chen ◽  
Xing Qian ◽  
Lijing Zang ◽  
...  
Keyword(s):  
Temperature Control ◽  
Distillation Columns ◽  
Control Schemes

Two-Point Composition−Temperature Control of Binary Distillation Columns

2006 ◽  
Vol 45 (26) ◽  
pp. 9010-9023 ◽  
Author(s):  
Eduardo Castellanos-Sahagún ◽  
José Alvarez-Ramírez ◽  
Jesús Alvarez
Keyword(s):  
Temperature Control ◽  
Distillation Columns ◽  
Point Composition

Analytical Study of Thermal Control Method to Minimize Temperature Change of a Plate With Changing Heat Generation

2007 ◽  
Author(s):  
Shigeki Hirasawa ◽  
Shinya Ito
Keyword(s):  
Feedback Control ◽  
Temperature Change ◽  
Temperature Control ◽  
Heat Generation ◽  
Time Step ◽  
Unsteady Temperature ◽  
Feed Forward ◽  
Object Position ◽  
Feed Forward Control ◽  
Monitoring Time

In semiconductor manufacturing process, very accurate temperature control is required. In this work we studied precise temperature control methods for a simple model by numerical simulation. To minimize temperature change at an object position of a vertical plate with varying a noise-heat-generation, we calculated unsteady temperature change of the plate under the effect of a feedback control and a feed-forward control of a control-heater. The temperature change at the object position can be decreased 1/10 times (0.7°C) using the feedback control of 2 s monitoring-time-step with the control-heater placed between the object position and the noise-heat-generation position. The temperature change at the object position can be decreased 1/1000 times (0.001°C) using the feed-forward control of 2 s monitoring-time-step and 5 s forecasting-time with the control-heater placed between the noise-heat-generation position and the object position.

scholarly journals Optimal control of a bleed air temperature regulation system

2021 ◽  
Author(s):  
Lan Shang
Keyword(s):  
Feedback Control ◽  
Temperature Control ◽  
Output Feedback Control ◽  
Aircraft Engine ◽  
State Feedback Control ◽  
Temperature Control System ◽  
Regulation System ◽  
Air System ◽  
Control Response ◽  
Optimal State Feedback

This thesis investigates temperature control of an aircraft engine bleed air system, aiming at reducing ram air usage to reduce fuel consumption while maintaining fast temperature control response. To achieve both of the objectives, a system configuration is designed to control both ram air and bypass flows. The analytical equations describing the systems dynamics are derived and utilized in developing the overall bleed air system model. Optimal state feedback control and output feedback control are applied in the temperature control system. Computer simulations and experiments have been conducted, and the proposed configuration and control strategy are shown to be effective in minimizing ram air usage and maintaining fast temperature control response in the meantime.

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