The invention discloses a position-sensorless controller of an automobile EPS steering system in the field of automobile control. The controller is composed of an EPS state feedback controller, a band-pass filter, a per-unit module, a discrete angle judgment module, a low-pass filter, a two-phase high-frequency voltage calculation module, a 2s/2r coordinate transformation module, a 3s/2s coordinate transformation module, an angle initialization module and a low-pass filter. The EPS state feedback controller is connected with the input end of an EPS steering system after being connected with the two-phase high-frequency voltage calculation module in parallel; the output end of the EPS steering system is connected with the 3s/2s coordinate transformation module in series; the output end ofthe 3s/2s coordinate transformation module is sequentially connected with a second low-pass filter, a 2r/2s coordinate transformation module and an EPS state feedback controller in series to form local closed-loop control; through the discrete angle judgment module, precision estimation of the position angle of the motor is achieved, the defects of system delay, buffeting and the like are avoided,a traditional series closed-loop control system is replaced with the EPS state feedback controller, and the control precision of the system is improved.
本发明公开汽车控制领域中的一种汽车EPS转向系统无位置传感器控制器,由EPS状态反馈控制器、带通滤波器、标幺化模块、离散角度判断模块、低通滤波器、两相高频电压计算模块、2s/2r坐标变换模块、3s/2s坐标变换模块、角度初始化模块和低通滤波器组成,EPS状态反馈控制器与两相高频电压计算模块并联后连接EPS转向系统的输入端,EPS转向系统输出端与3s/2s坐标变换模块串联,3s/2s坐标变换模块输出端与第二低通滤波器、2r/2s坐标变换模块、EPS状态反馈控制器依次串联形成局部闭环控制,通过离散角度判断模块,实现对电机位置角度的精度估算,避免系统延迟、抖振等缺陷,通过EPS状态反馈控制器替代传统的串联闭环控制系统,提高系统的控制精度。
Position-sensorless controller of automobile EPS steering system
一种汽车EPS转向系统无位置传感器控制器
2020-08-07
Patent
Electronic Resource
Chinese
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