【摘要】 为了实现探测调整机构的高精度移动和定位 ,采用了基于单片机控制的PWM步进电机细分驱动技术。利用电流矢量恒幅均匀旋转的方法 ,即给步进电机两相绕组分别通以不同的电流 ,使合成的电流矢量恒幅均匀旋转 ,实现了 32细分微步驱动。步进电机绕组存在的非线性误差 ,造成了细分后步距角的不均匀 ,其最大误差为 2 4 .8% ,采用拉格朗日插值多项式拟合法进行误差修正后 ,提高了细分精度 ,最大误差为 8.1%。更多还原

【Abstract】 The PWM subdivision driving technique based on a single chip machine control is used to achieve the high precision movement and location of the detection and adjustment mechanism. The application of different currents to the two phase windings of the stepper motor causes the constant amplitude uniform rotation of resultant current vector to realize the 32 subdivision microstep driving. The nonlinear error of stepper motor windings results in the nonuniformity of step angle after subdivision, and the maximum error goes up to 24.8%. After the error is corrected by lagrange polynominal fitting, the subdivision accuracy is improved, and the maximum error is 8.1%.更多还原