Generator FIGURE 102.1 Cabinet assembly outline and installation(typical installation).(Courtesy of Honeywell, Inc. AIMS functions performed in both cabinets include flight management, electronic flight instrument systen (EFIS)and engine indicating and crew alerting system(EICAS)displays management, central maintenance, irplane condition monitoring, communications management, data conversion and gateway(ARINC 429 and ARINC 629), and engine data interface AIMS does not control the engines nor flight controls, nor operate any internal or external voice or data link communications hardware but does select the data link path as part of the communications management function. Subsequent generations of AIMS may include some of these latter In each cabinet the line replaceable modules(LRMs)are interconnected by dual arinc 659 backplane data buses. The cabinets are connected to the quadraplex(not shown)or triplex redundant ARINC 629 fly-by-wire data buses and are also connected via the system buses to the three multifunction control units(MCDU)used by flight crew and maintenance personnel to interact with AIMS. The cabinets merged and processed data over quadruple redundant custom designed 100 Mhz buses to the EFIS and EICAS In the AIMS the high degree of function integration requires levels of system availability and integrity not found in traditional distributed, federated architectures. These extraordinary levels of availability and integrity are achieved by the extensive use of fault-tolerant hardware and software maintenance diagnostics and promise to reduce the chronic problem of unconfirmed removals and low mean time between unscheduled removals (MTBUR). Figure 102.3 is a top-level view of the U.S. Air Force F-22 Advanced Tactical Fighter avionics. Like many other aircraft, the F-22 architecture is hybrid, part federated and part integrated. The left side of the figure is the highly integrated portion, dominated by the two Common Integrated Processors(CIPs)that process, fuse, and distribute signals received from the various sensors on the far left. The keys to this portion of the architecture are the Processor Interconnect(PI)buses within the CIPs and the High Speed Data Buses(HSDBs).(There are provisions for a third CIP as the F-22 avionics grow in capability. The right side of the figure shows the federated systems including the Inertial Reference, Stores Management, Integrated Flight and Propulsion Con trol, and Vehicle Management systems and the interface of the latter two to the Integrated Vehicle System Control. The keys to this portion of the architecture are the triple or quadruple redundant AS 15531( formerly MIL-STD-1553)command/response two-way data buses. e 2000 by CRC Press LLC© 2000 by CRC Press LLC AIMS functions performed in both cabinets include flight management, electronic flight instrument system (EFIS) and engine indicating and crew alerting system (EICAS) displays management, central maintenance, airplane condition monitoring, communications management, data conversion and gateway (ARINC 429 and ARINC 629), and engine data interface. AIMS does not control the engines nor flight controls, nor operate any internal or external voice or data link communications hardware but does select the data link path as part of the communications management function. Subsequent generations of AIMS may include some of these latter functions. In each cabinet the line replaceable modules (LRMs) are interconnected by dual ARINC 659 backplane data buses. The cabinets are connected to the quadraplex (not shown) or triplex redundant ARINC 629 system and fly-by-wire data buses and are also connected via the system buses to the three multifunction control display units (MCDU) used by flight crew and maintenance personnel to interact with AIMS. The cabinets transmit merged and processed data over quadruple redundant custom designed 100 Mhz buses to the EFIS and EICAS displays. In the AIMS the high degree of function integration requires levels of system availability and integrity not found in traditional distributed, federated architectures. These extraordinary levels of availability and integrity are achieved by the extensive use of fault-tolerant hardware and software maintenance diagnostics and promise to reduce the chronic problem of unconfirmed removals and low mean time between unscheduled removals (MTBUR). Figure 102.3 is a top-level view of the U.S. Air Force F-22 Advanced Tactical Fighter avionics. Like many other aircraft, the F-22 architecture is hybrid, part federated and part integrated. The left side of the figure is the highly integrated portion, dominated by the two Common Integrated Processors (CIPs) that process, fuse, and distribute signals received from the various sensors on the far left. The keys to this portion of the architecture are the Processor Interconnect (PI) buses within the CIPs and the High Speed Data Buses (HSDBs). (There are provisions for a third CIP as the F-22 avionics grow in capability.) The right side of the figure shows the federated systems including the Inertial Reference, Stores Management, Integrated Flight and Propulsion Con￾trol, and Vehicle Management systems and the interface of the latter two to the Integrated Vehicle System Control. The keys to this portion of the architecture are the triple or quadruple redundant AS 15531 (formerly MIL-STD-1553) command/response two-way data buses. FIGURE 102.1 Cabinet assembly outline and installation (typical installation). (Courtesy of Honeywell, Inc.)