Table 4.
Observer Model Parameters | ||||||||||||||||||||
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Semicircular canals and otoliths |
Feedback gains |
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SCC time constant | SCC adaptation constant | SCC gain (Kω) | GIF gain (Kf) | GIFω gain (Kωf) | Acceleration gain (Ka) | |||||||||||||||
5.7 | 80 | 3.0 | 2.0 | 2.0 | −2.0 | |||||||||||||||
Observer Model Results | ||||||||||||||||||||
Parameter |
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Peak y-axis linear velocity, cm/s |
Peak Angular velocity, °/s |
Horizontal translation, cm |
Tilt angle, ° |
Distance from rotation center, cm |
||||||||||||||||
C | YN | ZN | ZD | C | YN | ZN | ZD | C | YN | ZN | ZD | C | YN | ZN | ZD | C | YN | ZN | ZD | |
Actual | 0 | 60 | 60 | 60 | 28 | 28 | 28 | 28 | 0 | 42 | 42 | 42 | 10 | 10 | 10 | 10 | 0 | −122 | −122 | −122 |
Model output | 10 | 38 | 38 | 38 | 27 | 27 | 27 | 27 | 3 | 31 | 31 | 31 | 10.5 | 11 | 12 | 13 | 0 | −70 | −25 | −130 |
Fit to swing geometry | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0 | 36 | 24 | 46 | 10.5 | 12 | 12.6 | 12.1 | 0 | −86 | −55 | −110 |
Experiment results | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11 | 33 | 25 | 43 | 9.5 | 14 | 13 | 15 | 0 | −60 | −53 | −86 |
Columns are arranged by nulling condition (C = subject's ears are at the center of rotation; YN = y-axis nulling; ZN = z-axis nulling; ZD = z-axis doubling). GIF, gravito-inertial force; SCC, semicircular canals.