Red Team Amanda Newman Ankit Patel Bryan Cuervo UTC ENGR 329 Sept. 14, 2005

Outline Process Control Theory Background Steady State/Step Response Results Conclusions

Systems Identification M(t) vs. C(t) The SSOC Operation range The FOPDT Steady-state gain, response time, dead time

Background – System Parameters Input M(t) % power to blower motor (%) Output C(t) Pressure (cm-H2O)

Block Diagram – Pressure System

Pressure System Schematic

TAPTUBING OUTLET BLOWER MOTOR VARIABLE SPEED DRIVE CIRCUIT CONNECTOR PRESSURE RECORDING CONTROLLER DAMPERS TRANS- DUCER

SSOC Calculations Steady-state response curves Trials at 10% input intervals Sample range taken from steady-state region (12-15 seconds)

Results – Pressure System

FOPDT PARAMETER CALCULATIONS Input ranges 10-40%, 40-70%, % All “UP” Steps 4 trials per input step range t 0,T and K Ave 95% confidence level – Student’s t

Results – Step Response

Parameter Results – Data Sample

Parameter Results

Summary and Conclusions The C(t), M(t) relation SSOC Non-linear 1-10 cm-H2O Operational output range 30%-100% Operational input range

Summary and Conclusions FOPDT Step Response Parameters Gain – Increases from lower to upper ranges. Response Time – Significant variance between ranges. Dead Time – Decreases from lower to upper ranges.