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我的开发板是LaunchXL-F28069M,驱动板是BoostXL-DRV8301,电机是Y型无刷云台电机,14P12N,做完lab2a时候,电机再次转动比较平稳,得到电机的Rs、两电感值及磁通量之后填入user.h,再继续做lab3a,识别时就发现电机转动会发出噪声,再继续做lab4、lab5a、lab5b,在进行电机识别或者调参数时都一样会有挺大的噪声,求解惑