An adaptive PI controller for room temperature control with level-crossing sampling

2012 ◽  
Author(s):  
Burkhard Hensel ◽  
Volodymyr Vasyutynskyy ◽  
Joern Ploennigs ◽  
Klaus Kabitzsch
Keyword(s):  
Temperature Control ◽  
Room Temperature ◽  
Pi Controller ◽  
Level Crossing

Carbon Fiber Reinforced Rigidizable Space Structures

2005 ◽  
Vol 888 ◽  
Author(s):  
Stephen Andrew Sarles ◽  
Todd Bullions ◽  
Thompson Mefford ◽  
Judy Riffle ◽  
Don Leo
Keyword(s):  
Carbon Fiber ◽  
Temperature Control ◽  
Pi Controller ◽  
Space Structures ◽  
Heating Process ◽  
Thermosetting Resin ◽  
Resistive Heating ◽  
Flexible Space Structures ◽  
Material Stiffness ◽  
Reinforcing Material

ABSTRACTIn attempts to provide an active solution for the rigidization of flexible space structures, internal resistive heating is applied to a novel thermosetting resin. Carbon-fiber tow coated in U-Nyte Set 201A, which cures at ∼150°C, was heated by passing electric current through the reinforcing material. Using a proportional-integral (PI) controller, precise temperature control of the heating process was established. Samples cured via controlled internal resistive heating were heated to 160°C and underwent material consolidation in less than 7 minutes. A change in material stiffness was measured to be almost two orders of magnitude greater than that of an uncured material.

scholarly journals Radio frequency mixing modules for superconducting qubit room temperature control systems

2021 ◽  
Vol 92 (7) ◽  
pp. 075108
Author(s):  
Yilun Xu ◽  
Gang Huang ◽  
David I. Santiago ◽  
Irfan Siddiqi
Keyword(s):  
Radio Frequency ◽  
Control Systems ◽  
Temperature Control ◽  
Room Temperature ◽  
Superconducting Qubit ◽  
Frequency Mixing

A simple and inexpensive capillary furnace for variable-temperature X-ray diffraction

2008 ◽  
Vol 41 (1) ◽  
pp. 214-216 ◽  
Author(s):  
Christine Lavigueur ◽  
E. Johan Foster ◽  
Vance E. Williams
Keyword(s):  
Liquid Crystals ◽  
Temperature Control ◽  
Room Temperature ◽  
Variable Temperature ◽  
Target Temperature ◽  
Simple Design ◽  
X Ray Diffraction ◽  
Standard Temperature ◽  
X Ray ◽  
Transmission Geometry

An inexpensive capillary furnace has been developed for variable-temperature X-ray diffraction in transmission geometry of air-stable liquid crystals and other materials. It offers temperature control with fluctuations of less than ±1 K in the range of interest for these samples, from room temperature to near 573 K. Phases can be accessed through heating or cooling with no significant overshooting of the target temperature. The furnace is designed to fit on a classical goniometer, and can be controlled by any standard temperature controller. The simple design of this furnace means that it is both inexpensive to build and easy to operate.

scholarly journals Temperature Control of Gas Chromatograph Based on Switched Delayed System Techniques

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Xiao-Liang Wang ◽  
Ming-Xu Zhang ◽  
Kun-Zhi Liu ◽  
Xi-Ming Sun
Keyword(s):  
Temperature Control ◽  
Lyapunov Functional ◽  
Reference Signal ◽  
Pi Controller ◽  
Temperature Control System ◽  
Linear Matrix ◽  
Matrix Inequalities ◽  
Gas Chromatograph ◽  
Delayed System ◽  
The Stability

We address the temperature control problem of the gas chromatograph. We model the temperature control system of the gas chromatograph into a switched delayed system and analyze the stability by common Lyapunov functional technique. The PI controller parameters can be given based on the proposed linear matrix inequalities (LMIs) condition and the designed controller can make the temperature of gas chromatograph track the reference signal asymptotically. An experiment is given to illustrate the effectiveness of the stability criterion.

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