Strategy to Decrease the Angle Measurement Error Introduced by the Use of Circular Grating in Dynamic Torque Calibration. - Yongbin Du; Feng Yuan; Zongze Jiang; Kai Li; Shuiwang Yang; Qingbai Zhang; Yinghui Zhang; Hongliang Zhao; Zhaorui Li; Shunli Wang 004 (Sensors, 2021)