Closed loop of boost converter based on slide mode control

The output voltage is regulated using a nonlinear control technique

Sliding Mode Control (SMC) Overview

SMC is a nonlinear control method where the system dynamics are forced to “slide” along a defined surface (called the sliding surface) toward the desired operating point.

Key characteristics:

• High robustness to parameter variations and disturbances
• Fast dynamic response
• Suitable for power converters with nonlinearity and uncertainty

Structure of the Control Loop

1. Reference Voltage (Vref): Desired output voltage.
2. Output Voltage Feedback (Vo): Measured actual output.
3. Error Calculation (Vref - Vo): Used to determine system deviation.
4. Sliding Surface (s): Typically defined as