arXiv:2611.09674v1 Announce Type: new Abstract: Electro-hydraulic pitch systems account for about one fifth of wind-turbine failures, motivating the development of resilient control strategies for fault mitigation. The study considers a large set of robust nonlinear control designs of different feedback principles and architectures, and assesses their fault-tolerant capabilities in comparison to each other and against the industrial standard, i.e. the Proportional-Integral (PI) controller. The implementation and tuning of each scheme is based on a high-fidelity simulator to ensure nominal performance, whereas each controller is deployed unchanged on an experimental apparatus that includes a full-scale electro-hydraulic pitch system. The comparative evaluation of the considered fault-tolerant solutions is carried out through several tests that cover nominal operation and twenty-five representative fault scenarios, including sensor, process, and actuator faults. The analysis highlights the trade-off between performance preservation under faults and increased actuator chattering. The experimental results show that introducing a dynamic input-reconstruction module into the design of the nonlinear controllers significantly reduces actuator chatter without compromising their fault-tolerant properties.