· Disaster relief
· Household and community resiliency enhancement
· Microgrid design with 12 kW solar panels, 3 kW wind turbine, and SYNDEM converters
· Back to back grid converter for system-backup
Q.-C. Zhong, Y. Wang, and B. Ren. Connecting the Home Grid to the Public Grid: Field Demonstration of Virtual Synchronous Machines. IEEE Power Electronics Magazine, vol. 6, no. 4, pp. 41 – 49, 2019.
· Autonomous operation in grid-connected or islanded mode
· Load sharing among parallel operation of inverters
· Stable operation and disturbance rejection
· Regulation of voltage and frequency
· Lab-scale microgrid platform with 8 nodes, including wind, solar, battery, generator, utility grid interface, and flexiable loads
Y. Wang, B. Ren, and Q.-C. Zhong. Robust Power Flow Control of Grid-Connected Inverters. IEEE Transactions on Industrial Electronics, vol. 63, no. 11, pp. 6887-6897. 2016.
· Generator control in wind turbine
· Power flow control in weak grid
· Wind farm optimization with wake effects
· Integration of renewables with utility grid
B. Ren, Y. Wang, and Q.-C. Zhong. UDE-based Control of Variable-speed Wind Turbine Systems. International Journal of Control. vol. 90, no. 1, pp. 137-152. 2017.
· Smart PV inverter technology
· Applications of PV + energy storage
Y. Wang, and B. Ren. Fault Ride-Through Enhancement for Grid-tied PV Systems with Robust Control. IEEE Transactions on Industrial Electronics, vol. 65, no. 3, pp. 2302-2312. 2018.
· Robust control/Geometric control
· Critical infrastructure health monitoring (e.g., wind turbine, oil/gas pipeline)
· Control of micro-UAVs in vortex flow
· Autonomous shipboard landing and take-off
· Solar powered UAVs
· Wireless charging system for UAVs
B. Ren, S. S. Ge, C. Chen, C.-H. Fua and T. H. Lee. Modeling, Control and Coordination of Helicopter Systems. Springer, 2012.
· Precise motion control in piezoelectric stage with hysteresis compensation
· Hysteresis modeling and continuous control of functional oxide films (VO2)
B. Ren, J. Dai, and Q.-C. Zhong. UDE-based Robust Output Feedback Control with Applications to a Piezoelectric Stage. IEEE Transactions on Industrial Electronics, vol. 67, no. 9, pp. 7819 – 7828, 2020.
· Station keeping and vibration control of mooring systems
· Offshore wind energy harvesting
· Laser pulse shaping and optimization
· Stage positioning control in motion systems
B. Ren, P. Frihauf, R. J. Rafac, and M. Krstic. Laser pulse shaping via extremum seeking. Control Engineering Practice. vol. 20, no. 7, pp. 674-683. 2012.
· Robust Control
· Adaptive Control
· Neural Networks
· Boundary Control of Systems Modeled by PDEs
· Real-time Optimization with Extremum Seeking
- Y. Wang, B. Ren, and Q.-C. Zhong. Bounded UDE-based Controller for Input Constrained Systems with Uncertainties and Disturbances. IEEE Transactions on Industrial Electronics, 2020. DOI: 11.1109/TIE.2020.2969069.
- B. Ren, J. Dai, and Q.-C. Zhong. UDE-based Robust Output Feedback Control with Applications to a Piezoelectric Stage. IEEE Transactions on Industrial Electronics, vol. 67, no. 9, pp. 7819 – 7828, 2020.
- J. Dai, and B. Ren. UDE-based Robust Boundary Control for an Unstable Parabolic PDE with Unknown Input Disturbance. Automatica, vol. 50, no. 1, pp. 11403-11408. 2018.
- B. Ren, Q.-C. Zhong, and J. Dai. Asymptotic Reference Tracking and Disturbance Rejection of UDE-Based Robust Control. IEEE Transactions on Industrial Electronics, vol. 64, no. 4, pp. 3166-3176. 2017.
- B. Ren, Q.-C. Zhong, and J. Chen. Robust Control for a Class of Non-affine Nonlinear Systems Based on the Uncertainty and Disturbance Estimator. IEEE Transactions on Industrial Electronics. vol. 62, no. 9, pp. 5881–5888. 2015.
- B. Ren, S. S. Ge, K. P. Tee, and T. H. Lee. Adaptive Neural Control for Output Feedback Nonlinear Systems Using a Barrier Lyapunov Function. IEEE Transactions on Neural Networks. vol. 21, no.8, pp. 1339-1345. 2010.