Aircraft Systems Components

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What is the primary difference between a CAN bus and an ASCB?

The number of nodes on the network

The communication protocol used

The wire and harness construction (correct)

The type of data transmitted

What happens when a CAN node wants to transmit data?

It requests permission from the master node

It waits for a specific time slot to transmit

It checks if the bus is busy and then transmits (correct)

It sends a request to the other nodes on the network

What is the purpose of the arbitration ID in a CAN frame?

To identify the receiving node

To specify the priority of the message

To label the frame with a unique identifier (correct)

To identify the transmitting node

What happens when multiple nodes try to transmit at the same time?

The node with the highest priority gets bus access (A) Signup and view all the answers

What is included in the CAN specification to ensure data integrity?

A method of error checking (A) Signup and view all the answers

What is the role of the master node in a CAN bus?

There is no master node in a CAN bus (B) Signup and view all the answers

What happens to frames with errors in a network?

They are disregarded by all nodes (C) Signup and view all the answers

What is the purpose of the Actuator Input-Output Processor (AIOP) modules?

To perform computations and data processing for autopilot and Yaw Damper functions (C) Signup and view all the answers

What happens if too many errors are detected in a network?

Individual nodes can stop transmitting errors or disconnect themselves (C) Signup and view all the answers

What is the function of the Flight Guidance Control System (FGCS) application?

To drive the autopilot control systems (A) Signup and view all the answers

What is the role of the clutched electro-mechanical servo assemblies in the aircraft system?

To operate in parallel with the normal pilot commands when engaged (B) Signup and view all the answers

What type of modules are the Actuator Input-Output Processors (AIOPs) within the Module Avionics Unit (MAU)?

Line Replaceable Modules (LRMs) (C) Signup and view all the answers

What is the primary function of the Power Supply in the MAU system?

To translate aircraft power to backplane conditioned power (C) Signup and view all the answers

What type of processing system is used by the User Modules to perform various aircraft control and monitoring functions?

Digital Engine Operating System (DEOS) compliant (B) Signup and view all the answers

What is the primary function of the Network Interface Controller (NIC) in the MAU system?

To supply the interface between the internal backplane bus and external bus systems (C) Signup and view all the answers

What type of I/O is used by the User Modules to interact with aircraft sensors and systems?

Both custom and generic I/O (C) Signup and view all the answers

What is the primary function of the User Modules in the MAU system?

To perform various aircraft control and monitoring functions (D) Signup and view all the answers

What manages communication in the MAU system?

The Network Interface Controller (NIC) (D) Signup and view all the answers

What is a key benefit of the ADCN network architecture?

Increased system reliability through redundancy (D) Signup and view all the answers

What happens when a subscriber in an ADCN network receives two identical data frames?

It rejects one of the frames and processes the other (C) Signup and view all the answers

What is the primary function of the auto-switching system in an ADCN network?

To automatically switch to the backup network in case of a failure (B) Signup and view all the answers

Why do subscribers in an ADCN network transmit the same information frame on both networks A and B?

To provide redundant data transmission (C) Signup and view all the answers

What is the purpose of having two networks (A and B) in an ADCN architecture?

To provide redundancy and ensure a data path is always available (C) Signup and view all the answers

What is the primary function of the AIOP modules?

To collect data from avionic and flight control systems via ASCB or FGCS inputs (B) Signup and view all the answers

How do the AIOP modules send position data to the servos?

Through a bidirectional CAN data bus (B) Signup and view all the answers

What is the purpose of the LVDTs in the autopilot system?

To provide analogue feedback to the Primary Actuator Control Electronics (P-ACE) System (C) Signup and view all the answers

What is required for the servos in a channel to be active and engaged?

Both AIOP modules in lane A and lane B operating simultaneously (B) Signup and view all the answers

What is the role of the P-ACE system in the autopilot feedback loop?

To perform analogue-to-digital conversion and send digital feedback data to the FCM (C) Signup and view all the answers

What type of signals does the FGCS provide to the FCMs?

Yaw damper and turn coordination signals (D) Signup and view all the answers