Line-of-Sight Rate Estimation Based on UKF for Strapdown Seeker

Table 4

Turntable specifications.

	Inner axis	Middle axis	Outer axis
Angular freedom	0.0000°~359.9999°	0.0000°~359.9999°	0.0000°~359.9999°
Position
Accuracy	0.0001°	0.0001°	0.0001°
Command resolution	0.0001°	0.0001°	0.0001°
Repeatability	±2′′	±2′′	±2′′
Rate
Range	±0.001°/s~±1000°/s	±0.001°/s~±300°/s	±0.001°/s~±200°/s
Stability over 360 deg.	1 × 10^−4	1 × 10^−4	1 × 10^−4
Stability over 10 deg.	1 × 10^−3	1 × 10^−3	1 × 10^−3
Command resolution	0.0005°/s	0.0005°/s	0.0005°/s
Dynamic
Bandwidth	≥12 Hz	≥10 Hz	≥8 Hz
Acceleration	≥3000°/s^2	≥1500°/s^2	≥800°/s^2