3 results about "Straight line trajectory" patented technology

The application provides a kayak athlete power output coordination control method, comprising: collecting the paddle water entry depth, the angle of attack deflection angle, the athlete power time and the hull acceleration, obtaining the complete record containing the paddle track arc and the hull acceleration change; according to the change of the straight line track and the arc track when the hull accelerates, the angle of attack deflection angle is extracted, the deviation degree of the angle of attack deflection angle and the effective propulsion angle range is evaluated, and the proportion of energy loss caused by the lateral component force under different deviation degrees is identified; according to the power output timing coordination score, the smoothness of the power transmission among the athlete, the paddle and the hull is analyzed, and the stability of the transmission efficiency in the acceleration stage is identified after removing the interference signal; according to the track optimization direction adjustment training system collection setting, the track optimization direction is returned to the collection density adjustment link, and the time interval setting of the next data collection is determined.

The invention involves a method for calculating a forward acoustic scattering Doppler frequency shift of an underwater moving target under an irregular trajectory, comprising: (1) converting earth longitude and latitude coordinates of a transmitting end, a target trajectory, and a receiving end into rectangular coordinates, and sequentially marking the coordinates as (xS, yS), (xT, yT), and (xR, yR) (2) recording a target trajectory coordinate sequence as (xT(ti), yT(ti)), wherein i=1, 2, . . . , N, and calculating an average navigation speed v within all time periods. (3) performing smoothing processing on the target trajectory to obtain a virtual straight trajectory, and respectively calculating horizontal distances from the target and the receiving end to an intersection of the virtual linear trajectory and a baseline, and an included angle between the virtual straight trajectory and the baseline; and (4) calculating the forward acoustic scattering Doppler frequency shift of the target at each time point by using the parameters calculated in steps (2) and (3).

This invention relates to a lightweight grinding trajectory planning algorithm and system based on contour-level point clouds, belonging to the field of industrial grinding and polishing planning technology. The method includes: acquiring a workpiece contour point cloud; detecting the deviation between the workpiece contour point cloud and a preset workpiece contour; generating contact reference points; performing local surface fitting on the contour point cloud to generate initial straight line trajectory segments; adjusting the curvature of the irregular surface by splicing multiple short trajectory segments; automatically matching corresponding trajectory parameters according to workpiece attributes to obtain an optimized contour grinding trajectory scheme; adjusting the contour grinding trajectory connection nodes through a secondary smoothing algorithm; adjusting the contour grinding trajectory height compensation value according to a preset pressure threshold; setting contact redundancy trajectories to optimize grinding positioning deviation; verifying trajectory fit and contact blind zones; and automatically triggering a warning signal and pausing contour grinding trajectory output when a severe lack of contour point cloud or excessive trajectory deviation is detected.