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Meet the minimum conditions to determine the value of the computer optimization of the flatness


Value + (., Yi, z) {b. This Ⅳ points calculated the average of the vertical axis S = 1/NZ. ; C. Select the plate the larger the distance between each other 3 points. Used as the initial point of reference plane to determine the 3-point slander plane equation lY; 1Ir a 0X2yZlX, Y. Z1l094ll a 10 Received, l9952 one. Revised manuscript received 0 j-year-old handsome Reader Service Education Engineering Picasso quotes 212T ● ●, f] / 1,. / A,, boots wide Si 30 Aviation Metrology & Measurement Technology Volume 16, 1996 it can be turned into the plane equation of the general type Aa \Respectively in the corresponding range, according to a given step value, change the coordinates of 3 points, that is changing the reference plane of spatial orientation; e. Asked by point to plane distance (which is to retain symbols) formula d - (AX + BY + CZ +1 )/(,[link widoczny dla zalogowanych]。+ B-C) t / fi = 1 ~ N, obtained by plane to the top of the points Tuen greatest distance plane (positive) and below the horizontal distance between the points to the greatest absolute value of dT (negative) value is at this time is the flatness of D-d a + dT 3 Z coordinates in the process of continuous change t find the minimum value of D. If the access point 3 of the step change Z coordinate value of fine enough, can seek to meet the operator sets the minimum value of the flatness conditions. Of course, the number of changes at this time the computer is running more than a relatively longer time to meet the minimum conditions 2, the flatness value of the computer even though the preferred running fast, but,[link widoczny dla zalogowanych], in the selected reference plane of the-A, the program has multiple cycles, And because many of the measured points, while taking into account the z coordinates of the possible range, so to minimize the number of t run the IBM PC but generally also need to run this program more than 1h. To reduce computer run time, so in the program the preferred method used to determine the way the plane is based on changes in a point Z, q is also continuous changes in the characteristics, as shown in Figure 2 where Figure 2, when the change to z, to obtain the minimum time value n Ⅲ m,[link widoczny dla zalogowanych], at this time if a continuous increase in z. T will be increased when it is a D run to Z. , They no longer continue to change the point Z coordinates. Computer which can shorten the running time is too large flatness values measured 3 Example 3 shows the flat circle of 25 evenly spaced test points, the z coordinates given by the number in brackets is a unit tzm; If the Dayton Education leveling data using the diagonal method to process a manual to be more than 8h, the flatness is obtained 6.55gin and prepared by our software (I plant for sale) in the IBM machine running 20rain, then The results can be drawn. Well when the operator sets the minimum conditions for the flatness is 5.46m shows r use of computer processing speed, high precision. As a result, more accurately meet the minimum condition, is one kind of method should be promoted. 4 block diagram (Figure 4) \ ~ -/1ilZ. , Circle 2A. (N) A! ((, 6) H (a 【1_3A. (27) AfS6), 1 (19) 17r) A (1.n) A (1 A'0 (17) EEiA \(0.9) A ・, t】 AI ・ (19); I (r AI (17), 54JAIR 【23) A ・ (0) (n1). All (36) A2'3l】 A ( 『0) A =. (【0) A,[link widoczny dla zalogowanych], (n) Figure 3 2 Wang Shiying character sets such as the minimum conditions to determine the flatness value of the preferred start and auxiliary computer specifications and award of the flat plate cell Lie Essay on the value of the input device delete training points to teach the value of N G vessels narrow to allow the flatness of the number of access points to sit Lin} mixed into juice, _ Tuoge treatment also play Mang out of my rainbow. L.H-\r_ mean a split second lost 1 point to determine surface parameters No. A (.... W.1 (J ~ 3 and then a vertical coordinate value j W) a S.G / 3 + G/12 ・} 1 『1 ll triple the hook point from the surface of No. l (with ± and then according to the small value of F. 7 ', this D - (F7,) ... D , / A brother selected coordinates (UI,? tn) n Wei Wan value (i \from the plane (with = inch) Li F small value 7'AD-tF7 ') ... N Moment Point selected to sit handle Af (3, V1, n) device Lei Yan Pi dry curly Figure 4D> (,? Iy rain stone roller 3-point seat ring plane table salt is not seeking public funds in the Results Tsang Results

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