P3K RTC AlgorithmControls - PowerPoint PPT Presentation
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P3K RTC AlgorithmControls
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Let tweeter DM do everything and then offload to woofer. If split based on spatial freq. ... Is the offload from tweeter to woofer going to the correct place? ... – PowerPoint PPT presentation
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Title: P3K RTC AlgorithmControls
1
P3K RTC Algorithm/Controls
- Mitchell Troy
- With much thanks to Chris Shelton
- System Engineering meeting
- 8/9/2007
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Modal Versus Zonal Control
- Assume A Actuators, M modes to control, S
of slope measurements, G M gains (one for each
mode) - Zonal control
- 1 matrix multiply (S by A matrix)
- Modal control option 1
- 2 matrix multiplies (S by M and M by A matrices)
- M can be as large as A
- Allows for on-fly adjustment of gains for each
mode - Model control option 2
- 1 matrix S by A
- Adjust modal gains (G) offline and generate
control matrix ( (S by M) X G X (M by A)) offline - Must be able to hot swap reconstructors
- Suggested requirement
- Single matrix multiple S X A
- Must be able to hot swap reconstructors
3
Woofer/Tweeter Control
- How do we split the Woofer/Tweeter commands?
- Two basic methods
- Split commands based on spatial frequency
- Let tweeter DM do everything and then offload to
woofer - If split based on spatial freq.
- Still MAY need to handle saturation on tweeter
- If split based on temporal freq.
- Might get better temporal correction using both
DMs - GPI PDR Design
- Current design splits spatially
- Does not appear to handle saturation of tweeter!
- Sheltons suggestion for P3K
- Implement BOTH
4
GPI AO block diagram
Slide curtsey of Jean-Pierre Véran from GPI
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P3K AO block diagram
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Discussions/Issues
- Is the offload from tweeter to woofer going to
the correct place? - We should eventually design the whole P3K control
design (dont forget) - design the TT path for woofer and TTM
- Leaky terms
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