4 results about "Curve design" patented technology

This application provides a method, apparatus, device, and storage medium for designing a wave generator cam curve. The method includes: loading the radius of a true circle and the deformation of the cam to ensure that the circumference of the true circle is consistent with the circumference of the modified curve; constructing the tangent polar coordinate equation of the modified curve based on Fourier expansion, the equation containing a set of Fourier coefficients; determining candidate parameters and candidate polar diameters under the condition of satisfying a first constraint, based on the equation, the deformation, the extreme angles corresponding to the extreme values ​​of the curvature change, and the curvature ratio; calculating the difference between the candidate polar diameter and the standard ellipse polar diameter, the standard ellipse and the modified curve having the same semi-major axis and circumference; and finally, determining the target polar diameter and the contour parameters of the modified curve by combining the polar diameter difference, the corresponding polar angle, and the second constraint.

The application discloses a variable cross-sectional area distribution based circulating circle design method, which comprises the following steps: obtaining a given circulating circle outer ring; designing a circulating circle flow cross-sectional area distribution curve by using a Bezier curve, taking the flow cross-sectional area at an inlet as a standard, and taking the flow cross-sectional area at other positions as a relative cross-sectional area to obtain a circulating circle flow cross-sectional area distribution result; establishing a polar coordinate system and a rectangular coordinate system; and solving the inner ring coordinates of the circulating circle in the rectangular coordinate system according to the circulating circle flow cross-sectional area distribution result, and drawing an inner ring curve. The design method adopts a mode of fixing the circulating circle outer ring and changing the cross-sectional area distribution to design the inner ring, simultaneously realizes the circulating circle design with adjustable flow cross-sectional area distribution by using the Bezier curve, can separately design the circulating circle cross-sectional area distribution of different impellers, and realizes the variable cross-sectional area distribution design of the variable torque circulating circle.

This invention provides a method and design for the alignment of high-speed maglev turnouts, including determining the angle constraint between adjacent turnout beams based on the geometric relationship constraints of the track; constructing a straight-line approximation curve design using the standard stator unit length as a constraint; constructing a curve-to-straight-broken-line alignment design using circular curve segments; verifying the parameters of the designed transition curve and circular curve using at least the angle constraint between adjacent turnout beams; solving all parameters of the transition-circular-broken-line turnout alignment after verification; verifying the mechanical performance of the turnout alignment using static stress-deformation, dynamic analysis models, and modal analysis models; and selecting the optimal alignment parameters for the optimal turnout alignment while meeting the mechanical performance requirements. This invention solves the problem that existing turnout alignments are insufficient to meet the needs of practical engineering for turnouts with different levels of lateral passing speed.