Research Article
[Retracted] Research on Optimal Control Method of Tennis Racket String Diameter Based on Kalman Filter Algorithm
Table 3
Racket impact vibration frequencies of different material groups.
| NO | 16L polyester thread | 16L nylon imitation gut | NO | 16L polyester thread | 16L nylon imitation gut | NO | 16L polyester thread | 16L nylon imitation gut |
| 1 | 118.76 | 111.01 | 17 | 119.92 | 110.37 | 33 | 114.54 | 117.31 | 2 | 101.48 | 110.97 | 18 | 110.53 | 122.05 | 34 | 109.93 | 110.77 | 3 | 107.52 | 123.90 | 19 | 110.75 | 123.13 | 35 | 111.92 | 121.02 | 4 | 111.76 | 120.39 | 20 | 100.66 | 116.58 | 36 | 107.35 | 119.23 | 5 | 112.50 | 122.81 | 21 | 119.21 | 112.36 | 37 | 119.45 | 118.73 | 6 | 100.97 | 111.74 | 22 | 113.74 | 120.55 | 38 | 113.38 | 118.70 | 7 | 104.30 | 120.30 | 23 | 118.33 | 121.93 | 39 | 110.41 | 110.30 | 8 | 117.69 | 121.96 | 24 | 114.85 | 116.18 | 40 | 102.75 | 111.01 | 9 | 104.34 | 114.88 | 25 | 111.22 | 110.43 | 41 | 102.88 | 113.04 | 10 | 108.07 | 120.25 | 26 | 107.05 | 110.01 | 42 | 101.31 | 119.13 | 11 | 109.05 | 122.45 | 27 | 111.91 | 114.90 | 43 | 113.96 | 109.87 | 12 | 106.44 | 109.83 | 28 | 99.95 | 112.64 | 44 | 109.34 | 111.13 | 13 | 108.42 | 121.65 | 29 | 100.56 | 123.12 | 45 | 116.36 | 115.13 | 14 | 110.10 | 110.64 | 30 | 103.13 | 120.64 | 46 | 99.79 | 112.45 | 15 | 112.14 | 122.29 | 31 | 99.23 | 118.40 | 47 | 100.69 | 116.89 | 16 | 102.73 | 122.99 | 32 | 114.30 | 117.69 | 48 | 119.80 | 116.60 |
|
|