The FD system imposes torque limitations when the AFCS is coupled to the FD system.

The FD system imposes torque limitations when the AFCS is coupled to the FD system.

• A. AFCS
• B. BIM
• C. TRNG SWITCH
• D. FD SYSTEM

Answer: (D)

When AFCS is connected to the Flight Director, the protective torque limits come from the Flight Director system. The Flight Director acts as the supervisory layer in the flight-control path, translating commands into actuator movements while enforcing safety boundaries. The FD’s torque limiters cap the commanded torque to protect the actuators and avoid saturation or instability, ensuring the autopilot commands remain within what the control system can safely deliver. The AFCS provides stabilization commands, but the FD system enforces the actual torque limits in this coupled configuration. The other subsystems don’t implement these limits in this context.

When AFCS is connected to the Flight Director, the protective torque limits come from the Flight Director system. The Flight Director acts as the supervisory layer in the flight-control path, translating commands into actuator movements while enforcing safety boundaries. The FD’s torque limiters cap the commanded torque to protect the actuators and avoid saturation or instability, ensuring the autopilot commands remain within what the control system can safely deliver. The AFCS provides stabilization commands, but the FD system enforces the actual torque limits in this coupled configuration. The other subsystems don’t implement these limits in this context.