ardupilot/Tools/LogAnalyzer/tests/TestMotorBalance.py

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import DataflashLog
from LogAnalyzer import Test, TestResult
from VehicleType import VehicleType
class TestBalanceTwist(Test):
'''test for badly unbalanced copter, including yaw twist'''
def __init__(self):
Test.__init__(self)
self.name = "Motor Balance"
def run(self, logdata, verbose):
self.result = TestResult()
self.result.status = TestResult.StatusType.GOOD
if logdata.vehicleType != VehicleType.Copter:
self.result.status = TestResult.StatusType.NA
return
self.result.status = TestResult.StatusType.UNKNOWN
if not "RCOU" in logdata.channels:
return
ch = []
for i in range(8):
for prefix in "Chan", "Ch", "C":
if prefix + repr((i + 1)) in logdata.channels["RCOU"]:
ch.append(map(lambda x: x[1], logdata.channels["RCOU"][prefix + repr((i + 1))].listData))
ch = zip(*ch)
num_channels = 0
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ch = list(ch)
for i in range(len(ch)):
ch[i] = list(filter(lambda x: (x > 0 and x < 3000), ch[i]))
if num_channels < len(ch[i]):
num_channels = len(ch[i])
if logdata.frame:
num_channels = logdata.num_motor_channels()
if num_channels < 2:
return
try:
min_throttle = (
logdata.parameters["RC3_MIN"]
+ logdata.parameters["THR_MIN"]
/ (logdata.parameters["RC3_MAX"] - logdata.parameters["RC3_MIN"])
/ 1000.0
)
except KeyError as e:
min_throttle = (
logdata.parameters["MOT_PWM_MIN"]
/ (logdata.parameters["MOT_PWM_MAX"] - logdata.parameters["RC3_MIN"])
/ 1000.0
)
ch = list(filter(lambda x: sum(x) / num_channels > min_throttle, ch))
if len(ch) == 0:
return
avg_sum = 0
avg_ch = []
for i in range(num_channels):
avg = list(map(lambda x: x[i], ch))
avg = sum(avg) / len(avg)
avg_ch.append(avg)
avg_sum += avg
avg_all = avg_sum / num_channels
self.result.statusMessage = (
"Motor channel averages = %s\nAverage motor output = %.0f\nDifference between min and max motor averages = %.0f"
% (str(avg_ch), avg_all, abs(min(avg_ch) - max(avg_ch)))
)
self.result.status = TestResult.StatusType.GOOD
if abs(min(avg_ch) - max(avg_ch)) > 75:
self.result.status = TestResult.StatusType.WARN
if abs(min(avg_ch) - max(avg_ch)) > 150:
self.result.status = TestResult.StatusType.FAIL