Fadec- full authority digital engine control-latest

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],FADEC

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],- no form of manual override available - places full authority to the control of operating parameters of the engine in the hands of the computer. - if a total FADEC failure occurs, the engine fails. Note: If the engine is controlled digitally and electronically but allows for manual override, it is considered solely an Electronic Engine Control (EEC) or Electronic Control Unit (ECU). An EEC, though a component of a FADEC, is not by itself FADEC. When standing alone, the EEC makes all of the decisions until the pilot wishes to intervene.

[object Object],The benefits of digital electronic control of mechanical systems are evident in greater precision and an ability to measure or predict performance degradation and incipient failure. Typical examples of this are digital implementations of flight control or fly-by-wire (FBW) and digital engine control, or Full-Authority Digital Engine Control (FADEC). Integrated Flight and Propulsion Control (IFPC) allows closer integration of the aircraft flight control and engine control systems. Flight control systems are virtually all fly-by-wire in the modern fighter aircraft of today; the benefits being weight reduction and improved handling characteristics.

DESIGN REQUIREMENTS OF MODERN ENGINE CONTROL SYSTEM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],New engines are likewise adopting FADEC for the benefits offered by digital control, improved reliability and performance, weight reduction and other improvements in system integration and data flow.

A BACKGROUNDER ,[object Object],[object Object],[object Object],[object Object],[object Object]

A BACKGROUNDER ,[object Object],[object Object]

[object Object],FADEC is normally located on the engine fan casing. Therefore, FADEC cooling is difficult. However, there are many features of engine control which are distributed around the engine – such as reverse thrust, presently pneumatically actuated – which would need to be actuated by alternative means in a more-electric engine. This leads to the possibility of using distributed engine control.

[object Object],Modern ECUs use a microprocessor which can process the inputs from the engine sensors in real time. An electronic control unit contains the hardware and software (firmware). The hardware consists of electronic components on a printed circuit board (PCB), ceramic substrate or a thin laminate substrate. The main component on this circuit board is a microcontroller chip (CPU). The software is stored in the microcontroller or other chips on the PCB, typically in EPROMs or flash memory so the CPU can be re-programmed by uploading updated code or replacing chips. This is also referred to as an Electronic Engine Management System (EMS).

[object Object],FADEC works by receiving multiple input variables of the current flight condition including air density, throttle lever position, engine temperatures, engine pressures, and many others. Each FADEC is essentially a centralized system, with a redundant, central computer and centrally located analog signal interfacing circuitry for interfacing with sensors and actuators located throughout the propulsion system.

[object Object],[object Object],[object Object],[object Object]

[object Object],FADEC computes the appropriate thrust settings and applies them. During flight, small changes in operation are constantly being made to maintain efficiency. Maximum thrust is available for emergency situations if the throttle is advanced to full, but remember, limitations can’t be exceeded. Another new feature of the FADEC system is the ability to record the last 900 hours of flight. With readings taken every second, this stored information can be used to diagnose problem areas as well as review recent flight history.

FADEC : FUNCTIONS FADEC ENGINE CONTROL ACQUIRE SENSOR DATA PROCESS CONTROL LAWS COMMAND ACTUATORS AIRFRAME COMMUNICATION REPORT ENGINE STATUS RECEIVE ENGINE POWER COMMAND ENGINE HEALTH MONITORING DIAGNOSTIC PROGNOSTIC ADAPTIVE

FADEC : ESSENTIAL FEATURES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : INFRASTRUCTURE ,[object Object]

FADEC : INFRASTRUCTURE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : INFRASTRUCTURE ,[object Object],FADEC COMPUTER GEAR DRIVEN MECHANICAL PUMP ELECTRO-HYDRO-MECHNICAL CONTROL UNIT ACTUATED ASSEMBLY SOLENOID VALVES SERVO ACTUATING MOTORS WORKING FLUID FROM ENGINE / AIRCRAFT AIRCRAFT COMPUTER COCKPIT POSITION SENSORS MECHANICAL ACTUATORS POSITION SENSOR-1 POSITION SENSOR-2

FADEC : INFRASTRUCTURE ,[object Object],ELECTRO-HYDRO-MECHNICAL CONTROL UNIT POSITION SENSOR-1 SOLENOID VALVES SERVO ACTUATING MOTORS POSITION SENSOR-2 POSITION SENSORS MECHANICAL ACTUATORS FADEC COMPUTER POWER SUPPLY VARIOUS INPUTS FROM ENGINE & AIRCRAFT DISPLAY PANEL IN COCKPIT PILOT’s THROTTLE IN COCKPIT

FADEC : INFRASTRUCTURE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : INFRASTRUCTURE ,[object Object],[object Object],[object Object],[object Object]

FADEC : INFRASTRUCTURE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : INFRASTRUCTURE ,[object Object],FADEC LANE-A MONITOR FADEC LANE-A CONTROL FADEC LANE-B MONITOR FADEC LANE-B CONTROL FADEC LANE-A FADEC LANE-B ENGINE THRUST DEMAND ENGINE FUEL DEMAND

FADEC : INFRASTRUCTURE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : INFRASTRUCTURE ,[object Object],CaMa.CbMb 1 CaMa. Cb Mb 4 Ca Ma.CbMb 2 Ca Ma .CbMb 3 CaMa.Cb Mb 5 Ca Ma. CbMb 14 CaMa . Cb Mb 12 CaMa .Cb Mb 13 Ca Ma . CbMb 15 CaMa . CbMb 16 Ca Ma.Cb Mb 8 CaMa .CbMb 6 Ca Ma. Cb Mb 7 Ca Ma . Cb Mb 9 Ca Ma .Cb Mb 10 CaMa. CbMb 11 CONTROLLABLE ENGINE DISPACHABLE ENGINE ENGINE SHUT-DOWN NO FAILURE 1 FAILURE 2 FAILURES 3 FAILURES 4 FAILURES

FADEC : INFRASTRUCTURE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : INFRASTRUCTURE ,[object Object],[object Object],[object Object]

FADEC : ESSENTIAL FEATURES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : SCHEMATIC DIAGRAM AIRCRAFT COMPUTER PILOT IN COCKPIT MAIN FUEL CONTROL CORE AB FUEL CONTROL STARTING & IGNITION CONTROL FAN AB FUEL CONTROL EXHAUST NOZZLE CONTROL FAN DUCT FLAPS CONTROL BLEED VALVE CONTROL LP COMPRESSOR AIR EGV CONTROL HP COMPRESSOR AIR EGV CONTROL FADEC EECU POWER SUPPLY

CPU / Memory Actuation electronics Sensor electronics Sensor electronics Actuation electronics Sensor electronics Actuation electronics Actuator_1 Sensor_1 Sensor_ j Actuator_n Sensor_2 Actuator_2 Communication Power BUS FADEC Centralized Engine Control Communication CENTRALIZED CONTROL ARCHITECTURE Each function resides within the FADEC and uses unique point-to-point analog connections to system effectors.

CPU / Memory Actuation electronics Sensor electronics Sensor electronics Actuation electronics Sensor electronics Actuation electronics Actuator_1 Sensor_1 Sensor_ j Actuator_n Sensor_2 Actuator_2 Communication Power BUS FADEC Centralized Engine Control Communication DISTRIBUTED CONTROL ARCHITECTURE Functions are distributed outside of the FADEC and communicate via a common interface standard.

FADEC : ADVANTAGES ,[object Object],[object Object],[object Object],[object Object],[object Object]

FADEC : ADVANTAGES ,[object Object],[object Object],[object Object]

FADEC : ADVANTAGES ,[object Object]

FADEC : LIMITATIONS ,[object Object],[object Object]

SAFE TAKE OFFs & LANDINGs ALWAYS FADEC

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