Simulation Program for Sliding Mode Variable Structure Control

I developed a simulation program for Sliding Mode Variable Structure Control (SMC) as part of an academic assignment. This control methodology enables superior regulation of system states through a discontinuous control law that switches based on a sliding surface condition. The simulation implementation involved designing a sliding surface using system state variables and implementing a control law that includes equivalent control and switching terms. Through extensive simulations, I confirmed that this control approach significantly enhances system performance by providing robust stability against uncertainties and disturbances. The system demonstrates improved transient response with reduced chattering effect through proper boundary layer implementation. Furthermore, I conducted comprehensive research and analysis on this control method, examining its practical advantages including fast response and robustness, while addressing challenges such as chattering phenomena. The study also explored optimization techniques like adaptive sliding gains and higher-order sliding modes to improve control effectiveness. Overall, this assignment provided deep insights into sliding mode control theory and implementation, establishing a solid foundation for future research in nonlinear control systems. The MATLAB/Simulink implementation utilized key functions including ode solvers for system dynamics and custom SMC algorithms with saturation functions replacing sign functions to reduce chattering.