请高手帮忙解释一下，apm自动分析的含义

luxingji

Log File C:/Program Files (x86)/Mission Planner/logs/QUADROTOR/1/2015-08-01 19-00-22.log
Size (kb) 2871.451171875
No of lines 41998
Duration -1 day, 0:57:41
Vehicletype ArduCopter
Firmware Version V3.2.1
Firmware Hash 36b405fb
Hardware Type
Free Mem 0
Skipped Lines 0

Test: Autotune = GOOD - [+] Autotune 3679-15176

Test: Balance/Twist = GOOD -
Test: Brownout = GOOD -
Test: Compass = GOOD - No MAG data, unable to test mag_field interference

Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = FAIL - ERR found: FLT_MODE
Test: GPS = WARN - Min satellites: 6, Max HDop: 6.23
Test: IMU Mismatch = NA -
Test: Parameters = GOOD -
Test: PM = GOOD -
Test: Pitch/Roll = FAIL - Roll (57.71, line 30671) > maximum lean angle (45.00)
Test: Thrust = GOOD -
Test: VCC = FAIL - VCC below minimum of 4.6v (4.56v)