Robust Control of Full Bridge Inverter Based on Improved High-Order Sliding Mode Controller

It is difficult to adjust the parameters for the controller in the stability control of a full bridge inverter due to its unknown upper bound. To solve this problem, an improved second-order sliding mode twisting algorithm based on adaptive parameter has been proposed and simulated. By adding the adaptive parameter method into the original second-order sliding mode twisting controller, improved controller not only automatically regulates its parameters according to states of system but also fully compensates the uncertainty of upper bound. The simulation in the output control of full bridge inverter illustrates that the system can reach the target value of voltage and current in finite time. Compared with original second-order sliding mode twisting algorithm, this improved algorithm, though under the existence of unknown upper bound, can effetely guarantee the finite-time stability of the system.