A Novel Resonant Frequency Tracking Control for Linear Oscillatory Machine Based on Variable Exponential Terminal Sliding Mode Observer.

Improved Position Sensorless Resonant Frequency Tracking Control Method for Linear Oscillatory Machine.

Adaptive Full-Order Displacement Observer for Sensorless Resonant Frequency Tracking Control of Linear Oscillatory Machines.

Approximately Optimal Control of Discrete-Time Nonlinear Switched Systems Using Globalized Dual Heuristic Programming.