Title :
A feedback I2-controlled constant temperature solar radiation meter
Author :
Oliveira, Amauri ; Deep, Gurdip Singh ; Lima, Antonio Marcus Nogueira ; Freire, Raimundo Carlos Silvério
Author_Institution :
Dept. of Electr. Eng., Fed. Univ. of Bahia, Salvador, Brazil
fDate :
10/1/1998 12:00:00 AM
Abstract :
The conventional thermoresistive sensor-based feedback constant temperature circuits have shown some performance limitations due to the input offset voltage of the amplifier. The dc analysis of this circuit has been presented to graphically demonstrate these limitations. Alternative feedback measurement scheme without employing the Wheatstone bridge is proposed. PI and predictive controller designs are described. Simulation results for these controllers and a practical configuration are presented
Keywords :
anemometers; bridge circuits; circuit feedback; electric sensing devices; physical instrumentation control; predictive control; radiometers; solar radiation; temperature sensors; two-term control; DC analysis; PI controller design; PWM; alternative feedback measurement scheme; amplifier input offset voltage; bridge circuit; constant temperature solar radiation meter; feedback I2-controlled; feedback constant temperature circuits; hot wire anemometer; performance limitations; predictive controller design; simulation; thermoresistive sensor; Bridge circuits; Capacitive sensors; Circuit simulation; Feedback circuits; Solar radiation; Temperature measurement; Temperature sensors; Thermal sensors; Thermoresistivity; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
