Avionics Architecture Quiz & Flashcards for Embraer 170/190

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Questions and Answers

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

To translate aircraft power to backplane conditioned power (correct)

To supply the interface between the internal backplane bus and external bus systems

To act as a gateway for modules to access the ASCB/LAN data buses

To perform various aircraft control and monitoring functions

What is the role of the Network Interface Controller (NIC) in the MAU?

To supply the interface between the internal backplane bus and external bus systems

To perform digital engine operating system compliant processing

To translate aircraft power to backplane conditioned power

To manage communication in the MAU (correct)

What type of processing system is used in the User Modules?

Generic I/O-based processing system

Analog-based processing system

Custom I/O-based processing system

Digital Engine Operating System (DEOS) compliant processing system (correct)

What is the purpose of the User Modules in the MAU?

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

What is the function of the custom and generic I/O in the User Modules?

To provide various aircraft sensor and system inputs and outputs Signup and view all the answers

What is the role of the NIC in relation to the internal backplane bus and external bus systems?

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

What is the primary function of the Modular Avionics Unit (MAU) in the Embraer 170/190?

To host independent applications and supply input/output interface services Signup and view all the answers

What is the purpose of the front connectors on the Line Replaceable Modules (LRM)?

To connect to the aircraft system wiring Signup and view all the answers

What is the benefit of having two independent processing systems (channels) in each Modular Avionics Unit (MAU)?

To provide redundancy and ensure system reliability Signup and view all the answers

What is the Virtual Back Plane Bus used for in the Modular Avionics Unit (MAU)?

To enable communication and power supply between Line Replaceable Modules (LRM) Signup and view all the answers

What is the purpose of the Metal Cabinet in the Modular Avionics Unit (MAU)?

To solidly ground the MAU to the aircraft frame Signup and view all the answers

What is the function of the Line Replaceable Modules (LRM) in the Modular Avionics Unit (MAU)?

To be plugged into the Backplane for power and communication Signup and view all the answers

What happens to frames with errors in a network?

They are disregarded by all nodes Signup and view all the answers

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

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

What is the result of detecting too many errors in the network?

Individual nodes stop transmitting errors or disconnect themselves from the network Signup and view all the answers

What is the role of the Flight Guidance Control System (FGCS) in the autopilot system?

To drive the autopilot control systems via clutched electro-mechanical servo assemblies Signup and view all the answers

What happens when a node detects an error in the network?

It retransmits the data Signup and view all the answers

What is the purpose of the clutched electro-mechanical servo assemblies in the autopilot system?

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

What is the purpose of the rudder pedal LVDT signal in the autopilot system?

To contribute to the calculation of the rudder actuator command Signup and view all the answers

What is the role of the FCMs in the autopilot system?

To combine autopilot pitch trim commands with configuration trim Signup and view all the answers

What is a characteristic of IMAs within a given type?

They are interchangeable but may require a software reconfiguration Signup and view all the answers

What is an example of an avionics application hosted by an IMA in a B787?

Flight data acquisition and recording Signup and view all the answers

What is the purpose of the CAN bus interface in the autopilot system?

To transmit consolidated commands to the horizontal stabiliser Signup and view all the answers

What is an example of a mechanical system controlled by an IMA in a B787?

Brake system Signup and view all the answers

What is the primary function of the Input/Output Module in the Avionics Data Communication Network?

To convert non-AFDX data into AFDX data Signup and view all the answers

Which of the following systems is NOT a fuel application?

Landing gear extension and retraction system Signup and view all the answers

What type of technology is used for communication between ADCN subscribers?

AFDX technology Signup and view all the answers

What is the primary characteristic of all Input/Output Modules?

They are fully interchangeable Signup and view all the answers

Which of the following is a data link application?

Air traffic control system Signup and view all the answers

What is the term used to describe the computers connected directly to the Avionics Data Communication Network?

ADCN subscribers Signup and view all the answers

Study Notes

Autopilot and Control Systems

Rudder actuator commands are driven by the combination of rudder pedal LVDT signals and autopilot trim commands.
Autopilot pitch trim commands, including auto-trim and Mach trim, are sent to Flight Control Modules (FCMs) and integrated with configuration trim for transmission to the horizontal stabilizer via CAN bus.

Integrated Modular Avionics (IMA) Overview

Types of IMAs vary based on aircraft models and systems; within each type, IMAs are interchangeable but may require software reconfiguration.
B787 IMA applications include:
- Avionics: Covers displays, flight management, data acquisition, and communication management.
- Environmental Control Systems: Air conditioning, pressurization, and electronic cooling management.
- Electrical Systems: Manages secondary electrical distribution and window heating.
- Fuel Systems: Monitors fuel quantity and manages nitrogen generation.
- Hydraulics and Mechanical Systems: Control of brakes, landing gear, and steering functionalities.

Network Interface Controller (NIC)

Acts as a gateway enabling modules to access ASCB/LAN data buses.
Interfaces between internal backplane buses and external bus systems.

Modular Avionics Unit (MAU)

Embraer 170/190 employs MAUs linked through data buses to aircraft systems.
MAUs host independent applications sharing computing and memory resources and provide I/O interface services to conventional avionics.
Each MAU consists of two independent processing systems for redundancy, enclosed in a metal cabinet grounded to the aircraft frame.

Communication and Error Management

MAU communication managed by NIC, ensuring data integrity.
Frames with errors are disregarded; erroneous transmissions signal issues via the network, allowing for retransmission attempts and potential node disconnection in case of repeated errors.

Flight Guidance Control System (FGCS)

Autopilot in Embraer 190 is part of the FGCS application, which interfaces standard pilot commands with autopilot control systems using electro-mechanical servo assemblies.
Actuator Input-Output Processors (AIOPs) perform computations for autopilot and Yaw Damper (YD) functions, enhancing control reliability.

Input and Output Modules

Core Processing Input/Output Module (CPIOM) and Input/Output Module (IOM) act as ADCN subscribers managing conventional data conversion to AFDX data for the Avionics Data Communication Network (ADCN).
IOMs are interchangeable and facilitate communications between LRUs and the ADCN through AFDX technology.

Applications in Various Systems

Cockpit and flight controls applications manage controls, warnings, and data links.
Energy applications monitor circuit breakers and manage electrical loads.
Fuel applications focus on CG measurement and fuel management systems, while landing gear applications oversee braking and gear operations.

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Description

This quiz covers the integrated modular avionics architecture of Embraer 170/190 aircraft, including the modular avionics units and data buses. It is part of the CASA Part 66 training materials for turbine aeroplane aerodynamics, structures, and systems.

Embraer 170/190 Integrated Modular Avionics Architecture

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