Testing time for jet
July 1st 2005 Development and qualification testing of three flap system actuators for the new Falcon 7X business jet is performed on a test rig designed and built by Comar Engineering. It incorporates non-contact torque transducers from Sensor Technology.
The 22 and 200Nm Torqsense transducers were selected because they do not need to be physically connected to the test piece via a complicated set of slip rings.
In effect, a Torqsense transducer is a frequency dependent strain gauge operating at ultrasound frequencies. It consists of a piezoelectric comb mounted on the test shaft to monitor variations in its resonance frequency as the torsional load varies.
An RF link is used for wireless transmission of signals to an adjacent pickup so that rotation is unhindered.
Typical tests performed include: no load input torque, compressive loads, tensile loads, running-in, backlash, efficiency, performance and endurance (one endurance life being 20 000 operating cycles). More articles from Sensor Technology Ltd: When two is better than one (1st February 2008) Sensor Technology, the company that developed practical non-contact torque measurement, will once again unveil a major innovation at the MTEC Exhibition. New for 2008 is TorqSense RWT 330/340series, designed for use in applications where space is limited, and provides non-contact measurement of torque, speed, power and position of rotating shafts, such as machine drives, drive shafts for pumps, fans, mixers etc, and in the critical axes of test rigs... From Newsletter Stories | 
