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AEROSPACE & DEFENSE PROGRAMS
GAS TURBINE CONTROL SYSTEMS & SOFTWARE
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AIRCRAFT |
ENGINE |
FADEC |
ARH-70A |
Honeywell HTS900 |
Goodrich |
In the interest of capturing a larger turboshaft engine market share, Honeywell launched the development of the HTS900 engine. Based on the successful development work performed on the LTS101-850F-2B engine, the MSS/Goodrich team was again selected to develop the engine FADEC control system. The engine was subsequently selected to power the Armed Reconnaissance Helicopter ARH-70A.
Development program responsibilities assigned to MSS included:
- System configuration & requirements definition
- Development & verification of the engine FADEC application software (operating system software and control system software)
- System closed loop bench (CLB) development & testing
- System safety analysis on FHA & PSSA
- Test cell & aircraft testing support
The ARH-70A first flight took place in July 2006. The ARH-70A also completed Limited Use Testing (LUT) in early 2007. FADEC qualification was performed to RTCA/DO-178B Level A & RTCA/DO-254 Level A, resulting in FAA engine certification on 23 December 2008. Regrettably, the ARH Program was cancelled by the Pentagon on 16 October 2008. Other applications for the use of the aircraft and engine are under study at this time.
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The Bell 407 aircraft delivers the best speed, payload and range in its class. So, when the call came out to further enhance the engine control system, the best option was an MSS/Goodrich development team.
MSS development program responsibilities included:
- System development of a reversionary electronic engine control channel
- System, software & hardware requirement definition
- Backup NF governor analysis and design
- FADEC system and software open & closed loop bench testing verification
The Rolls-Royce 250 engine improvement program was completed in 2005. FAA engine certification was achieved in March 2006.
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The Cessna Citation CJ3 is a proven business jet with a remarkable combination of power, speed and flexibility, and is considered the CJ family flagship aircraft. The CJ3 aircraft is powered by fuel-efficient Williams FJ44-3A turbofan engines controlled by a Goodrich dual-channel FADEC.
MSS development program responsibilities included:
- Developing, verifying & qualifying the FADEC operating system software to RTCA/DO-178B Level A
- Conducting system safety analysis (FHA & PSSA)
- Configuration design of the engine overspeed protection system
- Designing FADEC channel switchover logic
- Developing PLD hardware requirements specifications to RTCA/DO-254 Level A
- Supporting engine& aircraft certification efforts with the FAA
The Cessna Citation CJ3 development program was a success for all parties involved with the engine FAA type certificate awarded on July 30, 2004 and the aircraft FAA type certificate awarded on October 15, 2004. MSS is currently supporting post-certification activities for this program.
The success of this MSS program lies in the fact that this generic operating system software has also been installed on over 20 other airframe applications, as outlined below, without the need for an upgrade due to an operating system software discrepancy:
- Adam: A700
- ATG: Javelin
- Cessna: CJ3, CJ1/1+, CJ2/2+, FJ-44 Stallion, FJ-44 Eagle
- Cirrus: The-Jet
- Diamond: D-Jet
- Epic: Elite
- Excel Jet: Sport Jet
- Grob spn: Utility Jet
- Lear: Learjet 25 (SpiritWing)
- Piper: Piper Jet
- SAAB: SK 60
- Scaled Composites: Proteus, GlobalFlyer
- Sino-Swearingen: SJ30
- Spectrum: S-33
AIRCRAFT |
ENGINE |
FADEC |
Cessna Citation Encore+ |
PW535B |
Hamilton Sundstrand |
MSS was brought on by Pratt & Whitney Canada and was responsible for the multi-engine DCU Data Management & Diagnostics Software.
MSS responsibilities included:
- System level requirements definition for:
- DCU data management system
- EEPROM data management system
- Software requirements definition
- Software design through picture-to-code (SCADE)
- Software integration
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The HH-65A ‘Dolphin’ is the US Coast Guard short range aircraft of choice
for Search & Rescue and Law Enforcement missions. In the quest for more power, the Honeywell LTS101-850F-2B engine was launched to meet the new requirements. As the LTS101 engine FADEC supplier, Goodrich selected MSS to join the development team and entrusted MSS with the following development responsibilities:
- System configuration & requirements definition
- Development & verification of the engine FADEC application software (operating system software and control system software)
- System closed loop bench (CLB) development
- CLB/test cell/ground/flight testing
The development program completed the first engine run in early 2004. The program was subsequently carried over to the Bell ARH-70A.
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AIRCRAFT |
ENGINE |
FADEC |
LM200 |
LHTEC CTP800 |
Goodrich |
MSS was responsible for the development of the control system verification test plan, including the FADEC CLB test procedures for the engine and propeller control laws as well as FADEC failure modes & effects.
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The launch of the Sikorsky S-76D model was first announced in February 2005. With the addition of the S-76D, the S-76 product line will remain best-in-class in the corporate VIP, offshore oil, airline, EMS/search-and-rescue and law enforcement segments. Pratt & Whitney Canada is developing the new PW210 engine, the PW210S, tailored for the specific needs of S-76D customers. The new engine will encompass the latest turbine technologies to provide the best match of power, range, payload and fuel consumption. MSS has contributed to the Goodrich dual-channel FADEC for the PW210S engine.
MSS development program responsibilities included:
- First Engine Run FADEC System
Development of the ECU embedded Operating System and Interface Software (OSS) using a combination of SCADE and hand-coded modules
Supporting first engine run in P&WC test cell
- Certified System
Development and verification of the FADEC On-Line Loader system
First engine run was completed in October 2006. A prototype helicopter made its first flight on 7 February 2009. Helicopter type certification is expected in 2010 and deliveries are anticipated later that year.
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ENGINE |
FADEC |
Turbomeca ARRIUS, ARRIEL & ARDIDEN |
Goodrich |
Turbomeca, a member of the SAFRAN Group, is a leading helicopter engine manufacturer. Since its inception, the company has produced over 50,000 turbine engines based on its own designs. This Goodrich FADEC was developed to control the ARRIUS, ARRIEL and ARDIDEN engines.
MSS development program responsibilities included:
- Development of a methodology to verify, per the guidelines of RTCA/DO-178B Level A, the high-level software requirements of a next-generation, multi-platform, partitioned triple microprocessor ECU
- Supporting engine and aircraft certification efforts with the applicable certification authorities, including EASA
- Developing the Operating Systems Software Design document
- Verification of software using an automated test bench
The development program was successful with program completion in 2008.
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