Helicopter Vibration Control System
LORD Corporation
Cary, NC
877 ASK LORD (275 5673)
www.lord.com
LORD Corporation recently announced product qualification for their Improved Vibration Control System (IVCS) for the Boeing H-47 Chinook helicopter. Under contract with Boeing since Sept. 2013, LORD has now completed all program milestones and received final qualification approval for the state-of-the-art patented system that controls steady state and transient vibration on the twin-engine tandem rotor heavy-lift helicopter.
The multiyear qualification effort culminated in late 2015 with installation and final flight evaluation of the production-ready IVCS. IVCS is the H-47 program name for LORD Corporation’s proven Active Vibration Control System. The U.S. Army Aviation Engineering Directorate recently completed the final qualification approval, and product deliveries for incorporation into the Boeing CH-47F production line began in mid-2016.
The IVCS technology uses accelerometers that measure aircraft vibration levels. A centralized computer processes these signals through a software algorithm that interprets the data and sends commands to force generators located under the pilot seats. These force generators create “anti-vibration” that stops the progression of vibration due to the main rotor, and creates a more comfortable vibration environment for the aircrew. The LORD product is a direct/drop-in replacement for the previously used passive tuned vibration absorber.
LORD secured the contract through a joint effort of LORD engineering, the U.S. Army Cargo Helicopter Program Office, and Boeing Defense, Space & Security. In addition to providing the system hardware, LORD provided the manpower and resources to flight-test the system to demonstrate performance results.
According to LORD Corporation’s Jim Nietupski, Customer Executive, the pursuit of this initiative from LORD began in 2004 with the idea of replacing heavy passive tuned vibration absorbers under the pilot’s seat with a new technology that would save weight. After a flight demonstration of the product, which began in 2008 with the Mississippi Army National Guard, and after several years of continued testing with the assistance of the U.S. Army Special Operations Aviation Regiment, the Army decided to pursue a program and selected Boeing to serve as the integrator of this technology.
Throughout its development, the Chinook aircraft has evolved with new technology, gained new capability and has increased in weight. This IVCS technology offers a triple-digit weight savings benefit, which creates a performance buy-back for H-47 Operators. LORD Corporation’s system will now be part of the baseline configuration moving forward, followed by opportunities for retrofit of Special Operation’s MH-47G, fielded CH-47Fs, and Foreign Military Sales’ H-47 aircraft.
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