Steering Solutions IP Holding Corporation

Suzhou Phaserise Technology Co., Ltd.

Beijing Goldwind Smart Energy Technology Co., Ltd.

Kun Li

Yang Zhao

Feng Tian

Yuping Shen

Xuxiang Zhu

Long Yang

Bo Cao

Xiaohui Di

Fubin Gu

A rapid ultrasonic dual-wave calibrated detection method includes: numbering a plurality of high strength bolts; searching, in a database in equipment, a calibrated empirical value Rof initial ratios Rof ultrasonic transverse wave transit time to ultrasonic longitudinal wave transit time for bolts with entirely or partially same specification data, or a calibrated empirical value kof a slope k of variation of a bolt tension with a ratio of transverse wave transit time to longitudinal wave transit time; measuring ratios Rof the ultrasonic transverse wave transit time to the longitudinal wave transit time for the plurality of high strength bolts; acquiring a pretightening axial force value, and using the pretightening axial force value in place of an average value of tensions of the plurality of high strength bolts, calculating calibrated another parameter kor R; and calculating axial forces of the high strength bolts.

Rapid ultrasonic dual-wave calibrated detection method for axial force of high strength bolt

A motor control system of a motor is provided. The system includes a state estimation observer that computes an estimated velocity based on an inertia-damping response to the dynamics of the motor shaft, a torque command signal, and the compensated command signal. This compensated signal comes from a proportional-integral-derivative (PID) controller that determines a difference between a sensed position and an estimated position. The estimated position is determined by the estimated velocity and an integrator. The control system may also include a motor-velocity based lowpass filter which applies a filter to the estimated velocity.

Observer design for estimating motor velocity of brush electric power steering system

Growing community of inventors

Suzhou, China

Kun Li