Quick Answer
Calculate Control Loop Hysteresis-Based Valve Stiction Severity Index
Calculator
Result Interpretation
Control Loop Hysteresis-Based Valve Stiction Severity Index Calculator computes Valve Stiction Severity in dimensionless using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Hysteresis Width = 1.8
- Loop Stability Scaling Factor = 1.5
- Controller Deadband Threshold = 1
- Normalized Setpoint Error Rate = 0
Expected Result:
- Valve Stiction Severity = 1.8
Engineering Interpretation:
Under the given input conditions, the calculated result is: Valve Stiction Severity = 1.8 dimensionless.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
valve stiction severity = (hysteresis width / controller deadband threshold) * (1.0 + abs(normalized setpoint error rate) / loop stability scaling factor)Formula family: formula_controls_control_valve_stiction_detection_quantification_analyzer
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| hysteresis_width | Hysteresis Width | INPUT | Hysteresis Width |
| deadband_threshold | Controller Deadband Threshold | INPUT | Controller Deadband Threshold |
| setpoint_error_rate | Normalized Setpoint Error Rate | INPUT | Normalized Setpoint Error Rate |
| stability_factor | Loop Stability Scaling Factor | INPUT | Loop Stability Scaling Factor |
| valve_stiction_severity | Valve Stiction Severity | OUTPUT | Valve Stiction Severity |
Calculation Steps
- Enter the hysteresis width in percent.
- Enter the controller deadband threshold in percent.
- Enter the normalized setpoint error rate in percent_per_second.
- Enter the loop stability scaling factor in percent_per_second.
- Step 1: Compute valve stiction severity.
- Read the valve stiction severity (dimensionless) from the results.
Engineering Summary
Calculate Control Loop Hysteresis-Based Valve Stiction Severity Index
Frequently Asked Questions
What does this calculator calculate?
The Control Loop Hysteresis-Based Valve Stiction Severity Index Calculator estimates Valve Stiction Severity based on the input parameters you provide
Why is hysteresis width important in this calculation?
hysteresis width is directly proportional to valve stiction severity. When you enter hysteresis width in percent, the calculator uses it in the engineering formula to compute the output
How should I interpret the result valve stiction severity?
The calculator outputs valve stiction severity in dimensionless. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Hysteresis Width (percent), Controller Deadband Threshold (percent), Normalized Setpoint Error Rate (percent_per_second), Loop Stability Scaling Factor (percent_per_second). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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