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ATGI Active Balance System


The specific problem addressed by this project relates to the unique feature of the JSF’s Short Take-off Vertical Landing (STOVL) aircraft.  The STOVL configuration, depicted in Figure 1, uses flexible couplings at each end of the lift fan drive shaft.  These couplings allow for misalignment in the system but can cause imbalance.  
M_ATGI_JSF_w_Shaft.jpgS_ATGI_Slap_001.jpg
 
   Figure 1. - JSF with Shaft driven lift fan

Over time, these imbalances can cause fatigue and deformation of the drive shaft.  Having the capability to actively adjust the rotational dynamics of the drive shaft can reduce the stress and essentially eliminate wear and vibration concerns.  This will reduce the need to perform time-consuming maintenance and thereby reduce the cost of ownership.

The current lift system design requires the drive shaft to rotate at an extremely high rate, between 5,000-8,500 rotations per minute (rpm).  This results in maximum velocities of approximately 5 inch/sec at the clutch coupling and 4 inch/sec at the engine fan coupling.  The shaft is also required to transfer nearly 28,000 shaft-HP to the clutch and lift fan.  Though there has been limited research into such a system, it is expected that the benefits of the ATGI Solid State Lightweight Active Balance Powered-by-light (SLAP) system would be substantial.
XL_ATGI_Fig2Chart.jpg
                                               Figure 2.

  • SLAP System Diagram having the following color-coded modules
  • Display module communication module vibration detect module
  • Processing module power supply module balance actuator module
v_slap.jpg


Performance Assessment Module
(Figure 2) SLAP system diagram having the following color-coded modules
  • Display module
  • Communication module
  • Vibration detect module
  • Processing module
  • Power supply module
  • Balance actuator module
  • Performance assessment module
L_ATGI_LabSealTestRig_001.jpg
S_ATGI_Without_SLAP.jpgS_ATGI_With_SLAP.jpg
          Without SLAP                           With ATGI SLAP

Product Sheet
Read more about Features, Advantages and Benefits.

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Contact ATGI | info@atgi.us
3489 SE Gran Park Way, Stuart, Florida 34997
Voice 772-283-0253 | Fax 772-283-0255 | ©2012 ATGI
 
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