SID parameters

7 parameters in the SID family. ArduCopter 4.7 only — other vehicles share many of these names but not always the same ranges or meanings.

SID_AXIS

System identification axis

Controls which axis are being excited. Set to non-zero to see more parameters

User level

Standard

Values

Value	Meaning
0	None
1	Input Roll Angle
2	Input Pitch Angle
3	Input Yaw Angle
4	Recovery Roll Angle
5	Recovery Pitch Angle
6	Recovery Yaw Angle
7	Rate Roll
8	Rate Pitch
9	Rate Yaw
10	Mixer Roll
11	Mixer Pitch
12	Mixer Yaw
13	Mixer Thrust
14	Measured Lateral Position
15	Measured Longitudinal Position
16	Measured Lateral Velocity
17	Measured Longitudinal Velocity
18	Input Lateral Velocity
19	Input Longitudinal Velocity

SID_F_START_HZ

System identification Start Frequency

Frequency at the start of the sweep

Units	Hz
Range	0.01 to 100
User level	Standard

SID_F_STOP_HZ

System identification Stop Frequency

Frequency at the end of the sweep

Units	Hz
Range	0.01 to 100
User level	Standard

SID_MAGNITUDE

System identification Chirp Magnitude

Magnitude of sweep in deg, deg/s and 0-1 for mixer outputs.

User level

Standard

SID_T_FADE_IN

System identification Fade in time

Time to reach maximum amplitude of sweep

Units	s
Range	0 to 20
User level	Standard

SID_T_FADE_OUT

System identification Fade out time

Time to reach zero amplitude at the end of the sweep

Units	s
Range	0 to 5
User level	Standard

SID_T_REC

System identification Total Sweep length

Time taken to complete the sweep

Units	s
Range	0 to 255
User level	Standard