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© National Instruments Corporation v LabWindows/CVI PID Control Toolkit User Manual
Contents
About This Manual
Conventions ...................................................................................................................vii
Related Documentation..................................................................................................vii
Chapter 1
Overview of the PID Control Toolkit
System Requirements ....................................................................................................1-1
Installation Instructions..................................................................................................1-1
Activation Instructions...................................................................................................1-2
PID Control Toolkit Applications..................................................................................1-2
PID Control....................................................................................................................1-3
Chapter 2
PID Algorithms
The PID Algorithm ........................................................................................................2-1
Implementing the PID Algorithm with the PID Functions .............................2-2
Gain Scheduling ..............................................................................................2-3
The Precise PID Algorithm............................................................................................2-4
Error Calculation .............................................................................................2-4
Proportional Action .........................................................................................2-4
Trapezoidal Integration ...................................................................................2-5
The Autotuning Algorithm ............................................................................................2-5
Tuning Formulas .............................................................................................2-6
Chapter 3
Using the PID Control Toolkit
Designing a Control Strategy.........................................................................................3-1
Setting Timing .................................................................................................3-1
Tuning Controllers Manually ..........................................................................3-2
Using the PID Library....................................................................................................3-4
PID Controller .................................................................................................3-4
Using PID with Autotuning.............................................................................3-6
Using PID with Gain Scheduling ....................................................................3-7
Using PID with Lead-Lag ...............................................................................3-8
Using PID with Setpoint Profiling ..................................................................3-8
Using Ramp Generators ..................................................................................3-9