This chapter presents three active fault-tolerant control (AFTC) frameworks for fully actuated systems (FASs) with actuator faults, sensor faults and measurement noise. Through the redundant observability, actuator and sensor faults are tolerated. The AFTC general framework based on traditional fusion observers can merely give a bounded error system. To further suppress noise, a saturation fusion strategy and a dead-zone fusion strategy are applied into the AFTC redesign, respectively. Especially in a linear FAS structure, the noise suppression performance of the two redesigned AFTC frameworks are proved to be superior. At last, some comparative cases experimentally illustrate fault tolerance and noise suppression performance.