130-28176 Parallax Inc, 130-28176 Datasheet - Page 307

• Manufacturer Part Number: 130-28176
• Description: KIT PARTS PROCESS CONTROL
• Manufacturer: Parallax Inc

Specifications of 130-28176

• Accessory Type: Education Kit
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Board of Education Full Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Final Challenge: Incubator Tuning
Tuning a PID system involves adjusting the software parameters for each factor. The goal
of tuning the system is to adjust the gains so the loop will have optimal performance
under dynamic conditions. As mentioned earlier, tuning is as much of an art as it is a
science. The basic procedures for tuning a PID controller are as follows. This procedure
assumes you can provide or simulate a quickstep change in the error signal:
As you gain experience in embedded control, you will see that the characteristics of the
process will determine how you should react to error.
Part A:
Part B:
A new species of eggs have arrived!
1. Turn all gains to 0.
2. Begin turning up the proportional gain until the system begins to oscillate.
3. Reduce the proportional gain until the oscillations stop, and then drop it by about
4. Increase the derivative term to improve response time and system stability.
5. Increase the integral term until the system reaches the point of instability, and
√
√
√
√
√
√
20 % more.
then back it off slightly.
Load and run IncubatorPID-SP.bs2.
Use StampPlot macro sic_pc_pid_sp_calc.spm.
Tune the PID settings for the fastest stabilization for the incubator temperature of
101.5 °F +/− 1 °F with a bias of 50% and drive time of 2 seconds. Start from a
stable temperature at the setpoint, and provide standard disturbance.
Discuss your results and capture a screenshot of control action.
Re-tune your system to control the temperature at 110 °F, +/− 2 °F with a 50%
bias and drive time of 1 second. Start from a stable temperature at the setpoint,
and provide standard disturbance.
Discuss your results and capture a screenshot of control action following a
disturbance.