Boeing B-777: Fly-by-Wire Flight Controls

Design and aircraft‐in‐the‐loop validation of structured‐H∞ self‐scheduled fault‐tolerant controllers

“…The name of this architecture is less known than its longitudinal counterpart, the C * law, 15,23 but both represent the most common flight control architectures used in commercial aircraft. 24,25 The modified Y * structure used includes the addition of integrators for the 𝜙 and 𝛽 tracking errors, see Figure 1. The control architecture is composed of feedforward K FF and feedback K FB gains together with a first order transfer function to transform the stick and pedal commands from the pilot into roll and sideslip reference commands, 𝜙 c and 𝛽 c , respectively.…”

“…The lateral/directional control structure adopted in this work is similar to the Y$$$ {}^{\ast } $$$ control law presented in Reference 3. The name of this architecture is less known than its longitudinal counterpart, the $$$ {C}^{\ast } $$$ law, 15,23 but both represent the most common flight control architectures used in commercial aircraft 24,25 …”

Security and performance comparison of different secure channel protocols for Avionics Wireless Networks

“…Each arrow in the figure 1 represents a logical communication link that physically consists of two wires connecting these devices via different paths (dissimilar path redundancy). For some specific sub-systems, there are sets of sensors and actuators connected on Controller Area Network (CAN) [7] or ARINC 429 buses for flight control systems [8]. The AFDX or a similar technology is used to interconnect time-and safetycritical sub-systems like environmental control, doors and other utility systems.…”