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Title:
METHOD FOR IDENTIFYING SLOW TRANSIENT VARIATIONS AND/OR LOCAL SPATIAL VARIATIONS OF A PHYSICAL PROPERTY IN A SET OF DATA POINTS
Document Type and Number:
WIPO Patent Application WO/2019/161746
Kind Code:
A1
Abstract:
Method for identifying slow transient variations and/or local spatial variations in vehicle related fluid dynamic conditions of a physical property in a set of data points, the method comprises the steps of: A) obtaining (10) a first set of data points (ts) related to a vehicle body surface, wherein the first set of data points is based on measured values or simulated data, wherein each of said data points is associated with at least i) a point of time, ii) a position in at least two dimensions of the vehicle body surface, and iii) a value representing a measured or simulated fluid dynamic physical property, wherein the physical property is pressure of a fluid, pressure of a mixture of fluids, friction between a surface and a flowing fluid or mixture of fluids, or temperature, wherein the data points in each position are separated in time by a sampling time step (Δts), and wherein the first set of data points represents a total time period (ttot); B) calculating (20) a temporal filtered value of the representation of the physical property for at least a portion of the first set of data points distributed over the total time period (ttot), wherein the temporal filtered value is based on a plurality of values of the representation of the physical property in the same position obtained over an effective filtering time period (Δtf) covering a plurality of data points, wherein the effective filtering time period (Δtf) has a certain time relation to the data point (ts) for which the calculation is carried out and wherein the effective filtering time period (Δtf) is considerably longer than an average sampling time step and considerably shorter than the total time period (ttot) : C) combining (30) at least a portion of the calculated temporal filtered values of the representation of the physical property with the point of time and position of the corresponding data point in the first set of data points so as to obtain a second set of data points where each value representing the physical property is the temporal filtered value; and D) analysing (40) in time sequence the second set of data points over at least a portion of the total time period (ttot).

Inventors:
LINDBERG, Simon (Jägaregatan 9C, Göteborg, Göteborg, SE)
MOESTAM, Robert (Ringtrastvägen 34, Växjö, Växjö, SE)
Application Number:
CN2019/074872
Publication Date:
August 29, 2019
Filing Date:
February 12, 2019
Export Citation:
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Assignee:
NINGBO GEELY AUTOMOBILE RESEARCH & DEVELOPMENT CO., LTD. (No. 818, Binhai 2nd Road Hangzhou Bay New Distric, Ningbo Zhejiang 6, 315336, CN)
International Classes:
G06F17/50
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (Room 1215-1218, Floor 12Left Bank Community,No. 68 Beisihuanxilu, Haidian District, Beijing 0, 100080, CN)
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