摘要
Abstract
Currently,trajectory measurement devices are categorized into contact-based and non-contact-based equipment.Non-contact devices are susceptible to environmental interference,while contact-based accelerometers,which are utilized for displacement measurement,encounter issues such as noise,zero drift,and installation angle errors.In light of the numerous challenges associated with contact accelerometers,a novel segmentation correction method for acceleration signal thresholds is proposed.When employing this method,the acceleration signal was segmented into three distinct phases based on the rate of acceleration change:the initial phase,the displacement phase,and the final phase.During the initial phase,the acceleration signal was averaged and zeroed.In both the displacement and final phases,the average value of the acceleration signal was subtracted.Within the displacement phase,velocity was adjusted using polynomial fitting to enhance accuracy.In the final phase,the velocity signal was refined with a Qualcomm filter to further improve the precision of displacement measurements.Through experimental validation on a roller screw platform,the displacement data processed by this method was compared against the data output from the platform's displacement sensor,with a relative peak error of less than 3.65%,attesting to the method's high accuracy and reliability.关键词
位移测量/加速度计/阈值分段校正/多项式拟合Key words
displacement measurement/accelerometer/threshold segmentation correction/fitting of a polynomial分类
信息技术与安全科学
