1{ 2 "Name": "HMMWV Pac89 Tire", 3 "Type": "Tire", 4 "Template": "Pac89Tire", 5 "Mass": 37.6, 6 "Inertia": [ 7 3.84, 8 6.69, 9 3.84 10 ], 11 "Coefficient of Friction": 0.8, // these parameters have been measured on a road with this friction 12 "Design Parameters": { 13 "Unloaded Radius": 0.464, 14 "Width": 0.318, 15 "Vertical Stiffness": 326332.4234, // defines linear stiffness, when no curve table is present 16 "Vertical Damping": 3483.932502, 17 "Vertical Curve Data": [[0.0, 0.0], // defines nonlinear vertical stiffness, takes priority over the linear model 18 [0.01, 2830.0], 19 [0.02, 6212.0], 20 [0.03, 10146.0], 21 [0.04, 14632.0], 22 [0.05, 19670.0], 23 [0.06, 25260.0], 24 [0.07, 31402.0], 25 [0.08, 38096.0], 26 [0.09, 45342.0], 27 [0.10, 53140.0]], 28 "Lateral Stiffness": 261065.0, 29 "Rolling Resistance": 0.015 30 }, 31 "Lateral Coefficients": { 32 "a0" : 1.49975356208205, // shape factor 33 "a1" : -4.84987524731462, // peak factor calculation 34 "a2" : 812.449795340733, // peak factor calculation 35 "a3" : 2613.92367840654, // BCD (slope at zero slip) calculation 36 "a4" : 48.857910109076, // BCD (slope at zero slip) calculation 37 "a5" : 0.0, // BCD (slope at zero slip) calculation 38 "a6" : -0.00879541881020228, // curvature calculation 39 "a7" : 0.376999015041155, // curvature calculation 40 "a8" : 0.0, // horizontal shift calculation 41 "a9" : 0.0, // horizontal shift calculation 42 "a10" : 0.0, // horizontal shift calculation 43 "a11" : 0.0, // vertical shift calculation 44 "a12" : 0.0, // vertical shift calculation 45 "a13" : 0.0 // vertical shift calculation 46 }, 47 "Longitudinal Coefficients": { 48 "b0" : 1.50018802672136, // shape factor 49 "b1" : -15.7761466722458, // peak factor calculation 50 "b2" : 1022.11238546683, // peak factor calculation 51 "b3" : -2.55317715303733, // BCD (slope at zero slip) calculation 52 "b4" : 208.777316195246, // BCD (slope at zero slip) calculation 53 "b5" : 0.0073134908964823, // BCD (slope at zero slip) calculation 54 "b6" : -0.00376410345674027, // curvature calculation 55 "b7" : 0.156330736057758, // curvature calculation 56 "b8" : -1.15310023217878, // curvature calculation 57 "b9" : 0.0, // horizontal shift calculation 58 "b10" : 0.0 // horizontal shift calculation 59 }, 60 "Aligning Coefficients": { 61 "c0" : 2.34, // shape factor 62 "c1" : 0.990427, // peak factor calculation 63 "c2" : 2.96848, // peak factor calculation 64 "c3" : -0.277098, // BCD (slope at zero slip) calculation 65 "c4" : -0.944859, // BCD (slope at zero slip) calculation 66 "c5" : 0.0, // BCD (slope at zero slip) calculation 67 "c6" : 0.0027699, // BCD (slope at zero slip) calculation 68 "c7" : -0.0001151, // curvature calculation 69 "c8" : 0.10, // curvature calculation 70 "c9" : -1.3329, // curvature calculation 71 "c10" : 0.0, // curvature calculation 72 "c11" : 0.0, // horizontal shift calculation 73 "c12" : 0.0, // horizontal shift calculation 74 "c13" : 0.0, // horizontal shift calculation 75 "c14" : 0.0, // vertical shift calculation 76 "c15" : 0.0, // vertical shift calculation 77 "c16" : 0.0, // vertical shift calculation 78 "c17" : 0.0 // vertical shift calculation 79 }, 80 "Visualization": { 81 "Mesh Filename Left": "hmmwv/hmmwv_tire_left.obj", 82 "Mesh Filename Right": "hmmwv/hmmwv_tire_right.obj", 83 "Width": 0.318 84 } 85} 86