SPOILER SYSTEM ELECTRONICS.pdf

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL SPOILER SYSTEM ELECTRONICS — SYSTEM DESCRIPTION 1. General A. Description The spoiler control system provides electrical and mechanical control of the spoilers, fault monitoring and annunciation. Pilot and copilot control wheels provide control inputs for...

GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL SPOILER SYSTEM ELECTRONICS — SYSTEM DESCRIPTION 1. General A. Description The spoiler control system provides electrical and mechanical control of the spoilers, fault monitoring and annunciation. Pilot and copilot control wheels provide control inputs for surface movement using RVDT position sensors. The sensors provide data to the Flight Control Computers (FCCs) and the Backup Flight Control Unit (BFCU). The FCCs and BFCU send control data to the Remote Electronic Units (REUs) located at each actuator. The REUs control the hydraulic actuators that power spoiler surface movement. See Figure 1 and Figure 2. The spoilers are located on the trailing edge of the wing, above the flaps. Each spoiler panel is controlled by a single actuator. The outboard spoilers use EBHA actuators and the inboard and midboard spoilers use EHSA actuators. 2. Component Location COMPONENT ATA QTY PER A/C LOCATION Speed brake control module 27-65-01 1 Pedestal Ground spoiler arm switch 27-65-03 1 Pedestal Ground spoiler flap override switch 27-65-03 1 Pedestal Spoiler remote electronics unit 27-65-05 6 Wing rear beam Spoiler motor control electronics 27-65-07 2 Wing rear beam 3. Component Details A. Speed Brake Control Module The speed brake control module is located in the pedestal and contains the speed brake handle. The speed brake function is manually accomplished using the speed brake handle. Actuation of the speed brake handle causes all spoiler panels to deploy proportionally to the handle displacement. The speed brake control module is used by the pilot / copilot to command the aircraft spoilers. The module contains four internal RVDTs sensors that translate lever motion into an analog signal sent to the FCCs to command the spoiler panels. For low light operation, an edge light panel indicates the retract and extend positions of the hanlde with lighted text. The speed brake control module uses an electrical connector and the aircraft wiring harness, to connect with the FCCs. The FCCs provide excitation and demodulation of the module RVDTs. The modular avionics unit No. 2 monitors the open / closed status of one of the two speed brake control module microswitches. A CAS message is displayed when the speed brake handle is moved out of the RETRACT position. The remaining microswitch is wired in series with the lamps of the speed brake handle. The handle lights up when the handle is moved out of the RETRACT position. B. Ground Spoiler Arm Switch The GND SPOILER switch is located on the pedestal switch panel. It is a split lens switch with the upper portion labeled OFF (amber) and the lower portion labeled ARMED (blue). When the switch 27-65-00 Page 1 August 15/14 GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL is extended, OFF lights up and when depressed ARMED lights up. The OFF annunciation is extinguished when the landing gear is retracted. The GND SPOILER switch is a Double-Pole Double-Throw (DPDT) switch that provides signals to the FCCs. The switch provides one pole per FCC. Each pole has the following two contacts: Normally open Normally closed The FCCs provide 28 Vdc open circuit discrete signals to the annunciator lights control box and lights the switch. One FCC is sufficient to command the lights. C. Ground Spoiler Flap Override Switch The GPWS / GND SPLR FLAP ORIDE switch is located on the pedestal switch panel. The primary function allows the flightcrew to inhibit certain EGPWS aural warnings that occur when the aircraft is at lower altitudes with flaps not set to a landing configuration. This is calculated by the EGPWS system based on the flight conditions and local terrain. The other function is to allow the use of the wheel speed logic in the automatic ground spoiler deployment when the flap setting is 20° or less. The ground spoiler flap override switch is a DPDT switch that provides signals to the FCCs. The switch provides one pole per FCC. Each pole has the following two contacts: Normally open Normally closed The FCCs provide 28 Vdc open circuit discrete signals to the annunciator lights control box and lights the switch. One FCC is sufficient to command the lights. D. Spoiler Remote Electronics Unit The REU is installed as part of the spoiler actuation systems at each instance of an EBHA or EHSA actuator. The REU provides positional control loop closure and failure management functions for the EBHA / EHSA. The REU contains level A software per DO-178B. The FCCs transmit command information to the REUs located at each actuator. Data to and from the REUs is sent using Bidirectional ARINC 429 (BD429) buses. (1) EHSA Remote Electronics Unit The EHSA REU electronics box is mounted directly to the hydraulic manifold and receives electrical power from a single circuit breaker. The EHSA REU receives surface position commands from the FCCs on two separate and independent BD429 data buses. One bus is from FCC No. 1 and the other from FCC No. 2. The REU is mounted on its associated hydraulic manifold. It processes the FCC signals and initiates electrical commands to the Mode Select Valve (MSV) solenoid and the ElectroHydraulic Servo Valve (EHSV). The MSV and EHSV control the flow of hydraulic fluid to move the actuator in the desired direction. (2) EBHA Remote Electronics Unit The EBHA REU electronics box is mounted directly to the HA hydraulic manifold and receives electrical power from two separate circuit breakers. Two circuit breakers are provided to allow separate wire routings from each breaker through the engine and APU rotor burst zones. The EBHA REU receives surface position commands from the FCCs on two separate and independent BD429 data buses. One bus is from FCC No. 1 and the other from FCC No. 2. The REU processes the FCC signals and initiates electrical commands to the MSV solenoid 27-65-00 Page 2 August 15/14 GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL in the HA manifold and the power select valve solenoid and EHSV in the EB manifold. Those components control the flow of hydraulic fluid to move the actuator in the desired direction. E. Spoiler Motor Control Electronics The Motor Control Electronics (MCE) is an electronics box that is mounted to the EB manifolds alongside the EBHA actuators. During backup operation with an operational REU, the MCE receives a velocity command from the EBHA REU and provides motor phase current corresponding to the velocity error. The velocity error is the difference between the commanded velocity and the actual velocity of the motor. The MCE interfaces with a resolver installed within the motor to determine the position and velocity of the motor. The motor position indicated by the resolver is used by the MCE to provide the phase sequence for the brushless DC motor. The velocity of the motor is used for closed-loop control. In backup mode following an REU failure, the MCE accepts commands from the FCC and an internal controller provides rate and direction commands to the EB manifold. 4. Controls and Indications A. Circuit Breakers The system is protected by the following circuit breakers: NOMENCLATURE PANEL LOCATION POWER SOURCE R INBD SPLR HA LEER A6 L ESS 28VDC L INBD SPLR HA LEER A7 L ESS 28VDC R OUTBD SPLR EBHA SEC LEER B6 L MAIN 28VDC L OUTBD SPLR EBHA SEC LEER B7 L MAIN 28VDC L MID SPLR HA PRI REER B5 R ESS 28VDC R MID SPLR HA PRI REER B6 R ESS 28VDC L OUTBD SPLR EBHA PRI REER C1 UPS 28 VDC R OUTBD SPLR EBHA PRI REER C2 UPS 28VDC L MID SPLR HA SEC REER C5 R ESS 28VDC R MID SPLR HA SEC REER C6 R ESS 28VDC L OUTBD SPLR EBHA PWR N/A EBHA PDB (tail compartment) EBHA BUS 28VDC R OUTBD SPLR EBHA PWR N/A EBHA PDB (tail compartment) EBHA BUS 28VDC B. CAS Messages The CAS messages for the system are shown in the following table: MESSAGE COLOR MESSAGE DESCRIPTION Ground Spoiler Unarm Blue Ground spoiler system is not armed, with landing gear extended. Select GND SPLR to ARMED if desired. 27-65-00 Page 3 August 15/14 GULFSTREAM G650ER SYSTEM DESCRIPTION MANUAL MESSAGE COLOR MESSAGE DESCRIPTION Speed Brake Extended Blue Speed brakes are extended, throttles at idle. Retract speed brakes if this is not desired flight condition. Speed Brake Extended Amber Speed brakes (flight spoilers) are deployed with throttles above idle. Retract speed brakes or reduce thrust as desired. Speed Brake Fail Amber Speed brake control failed. Notify maintenance for corrective action. Amber REU failure or loss of spoiler command to any spoiler panel. Continue flight within flight envelope limitations. NOTE: Symmetric spoiler on opposite wing will be rendered inoperative for speed brake and ground spoiler; however, still operative for roll control. Speed Brake Auto Retract Amber Speed brakes (flight spoilers) automatically retracted with speed brake handle not in RETRACTED position and TLA =90% or angle of attack limiting encountered. Place speed brake handle at RETRACTED position. If unable, speed brakes will be unavailable while message is displayed. Ground Spoiler Red Failure of ground spoiler component or deployed ground spoiler panel. Select ground spoiler switch OFF and perform appropriate procedures. Spoiler Panel Fail NOTE: The FCC status information required by the flightcrew is shown on the main displays as CAS messages and synoptic page data. 5. Operation A. Spoiler System Electronics Each FCC transmits on four separate BD429 buses to the spoiler REUs. This provides a total of eight independent FCC buses for spoiler control. In addition, the BFCU provides two separate standard ARINC 429 (A429) buses, one bus for each outboard flight spoiler EBHA REU. The spoiler EHSA REUs do not receive an input from the BFCU. Each FCC has a single MCE A429 transmit bus. In the event where both outboard flight spoiler REUs fail, the MCE bus allows the FCCs to retain control of the surface by directly commanding the MCE. Normally the MCE is controlled directly by its associated EBHA REU. When the actuator is in the electrical backup mode, the MCE controls the EBHA motor. 27-65-00 Page 4 August 15/14