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| 1 | +<?xml version="1.0" encoding="UTF-8"?> |
| 2 | +<OpenSimDocument Version="30501"> |
| 3 | + <Model name="double_pendulum"> |
| 4 | + <!--Acceleration due to gravity, expressed in ground.--> |
| 5 | + <gravity>0 -9.80665 0</gravity> |
| 6 | + <!--Credits (e.g., model author names) associated with the model.--> |
| 7 | + <credits>Ajay Seth</credits> |
| 8 | + <!--Publications and references associated with the model.--> |
| 9 | + <publications>For testing</publications> |
| 10 | + <!--Units for all lengths.--> |
| 11 | + <length_units>meters</length_units> |
| 12 | + <!--Units for all forces.--> |
| 13 | + <force_units>N</force_units> |
| 14 | + <!--List of bodies that make up this model.--> |
| 15 | + <BodySet> |
| 16 | + <objects> |
| 17 | + <Body name="rod1"> |
| 18 | + <!--The mass of the body (kg)--> |
| 19 | + <mass>1</mass> |
| 20 | + <!--The location (Vec3) of the mass center in the body frame.--> |
| 21 | + <mass_center>0 0.2 0</mass_center> |
| 22 | + <!--The elements of the inertia tensor (Vec6) as [Ixx Iyy Izz Ixy Ixz Iyz] measured about the mass_center and not the body origin.--> |
| 23 | + <inertia>0 0 0 0 0 0</inertia> |
| 24 | + <!--Set of wrap objects fixed to this body that GeometryPaths can wrap over.--> |
| 25 | + <WrapObjectSet> |
| 26 | + <objects /> |
| 27 | + <groups /> |
| 28 | + </WrapObjectSet> |
| 29 | + <!--For visualization in the Simbody visualizer or OpenSim GUI.--> |
| 30 | + <VisibleObject> |
| 31 | + <!--Set of geometry files and associated attributes, allow .vtp, .stl, .obj--> |
| 32 | + <GeometrySet> |
| 33 | + <objects> |
| 34 | + <DisplayGeometry> |
| 35 | + <!--Name of geometry file .vtp, .stl, .obj--> |
| 36 | + <geometry_file>cylinder.vtp</geometry_file> |
| 37 | + <!--Color used to display the geometry when visible--> |
| 38 | + <color> 1 1 1</color> |
| 39 | + <!--Name of texture file .jpg, .bmp--> |
| 40 | + <texture_file /> |
| 41 | + <!--in body transform specified as 3 rotations (rad) followed by 3 translations rX rY rZ tx ty tz--> |
| 42 | + <transform> 0 0 0 0 0.25 0</transform> |
| 43 | + <!--Three scale factors for display purposes: scaleX scaleY scaleZ--> |
| 44 | + <scale_factors> 0.02 0.5 0.02</scale_factors> |
| 45 | + <!--Display Pref. 0:Hide 1:Wire 3:Flat 4:Shaded--> |
| 46 | + <display_preference>4</display_preference> |
| 47 | + <!--Display opacity between 0.0 and 1.0--> |
| 48 | + <opacity>1</opacity> |
| 49 | + </DisplayGeometry> |
| 50 | + <DisplayGeometry> |
| 51 | + <!--Name of geometry file .vtp, .stl, .obj--> |
| 52 | + <geometry_file>sphere.vtp</geometry_file> |
| 53 | + <!--Color used to display the geometry when visible--> |
| 54 | + <color> 1 1 1</color> |
| 55 | + <!--Name of texture file .jpg, .bmp--> |
| 56 | + <texture_file /> |
| 57 | + <!--in body transform specified as 3 rotations (rad) followed by 3 translations rX rY rZ tx ty tz--> |
| 58 | + <transform> 0 0 0 0 0 0</transform> |
| 59 | + <!--Three scale factors for display purposes: scaleX scaleY scaleZ--> |
| 60 | + <scale_factors> 0.1 0.1 0.1</scale_factors> |
| 61 | + <!--Display Pref. 0:Hide 1:Wire 3:Flat 4:Shaded--> |
| 62 | + <display_preference>4</display_preference> |
| 63 | + <!--Display opacity between 0.0 and 1.0--> |
| 64 | + <opacity>1</opacity> |
| 65 | + </DisplayGeometry> |
| 66 | + </objects> |
| 67 | + <groups /> |
| 68 | + </GeometrySet> |
| 69 | + <!--Three scale factors for display purposes: scaleX scaleY scaleZ--> |
| 70 | + <scale_factors> 1 1 1</scale_factors> |
| 71 | + <!--transform relative to owner specified as 3 rotations (rad) followed by 3 translations rX rY rZ tx ty tz--> |
| 72 | + <transform> 0 0 0 0 0 0</transform> |
| 73 | + <!--Whether to show a coordinate frame--> |
| 74 | + <show_axes>true</show_axes> |
| 75 | + <!--Display Pref. 0:Hide 1:Wire 3:Flat 4:Shaded Can be overriden for individual geometries--> |
| 76 | + <display_preference>4</display_preference> |
| 77 | + </VisibleObject> |
| 78 | + </Body> |
| 79 | + <Body name="rod2"> |
| 80 | + <!--The mass of the body (kg)--> |
| 81 | + <mass>1</mass> |
| 82 | + <!--The location (Vec3) of the mass center in the body frame.--> |
| 83 | + <mass_center>0 0 0</mass_center> |
| 84 | + <!--The elements of the inertia tensor (Vec6) as [Ixx Iyy Izz Ixy Ixz Iyz] measured about the mass_center and not the body origin.--> |
| 85 | + <inertia>0 0 0 0 0 0</inertia> |
| 86 | + <!--Set of wrap objects fixed to this body that GeometryPaths can wrap over.--> |
| 87 | + <WrapObjectSet> |
| 88 | + <objects /> |
| 89 | + <groups /> |
| 90 | + </WrapObjectSet> |
| 91 | + <!--For visualization in the Simbody visualizer or OpenSim GUI.--> |
| 92 | + <VisibleObject> |
| 93 | + <!--Set of geometry files and associated attributes, allow .vtp, .stl, .obj--> |
| 94 | + <GeometrySet> |
| 95 | + <objects> |
| 96 | + <DisplayGeometry> |
| 97 | + <!--Name of geometry file .vtp, .stl, .obj--> |
| 98 | + <geometry_file>cylinder.vtp</geometry_file> |
| 99 | + <!--Color used to display the geometry when visible--> |
| 100 | + <color> 1 1 1</color> |
| 101 | + <!--Name of texture file .jpg, .bmp--> |
| 102 | + <texture_file /> |
| 103 | + <!--in body transform specified as 3 rotations (rad) followed by 3 translations rX rY rZ tx ty tz--> |
| 104 | + <transform> 0 0 0 0 0.25 0</transform> |
| 105 | + <!--Three scale factors for display purposes: scaleX scaleY scaleZ--> |
| 106 | + <scale_factors> 0.02 0.5 0.02</scale_factors> |
| 107 | + <!--Display Pref. 0:Hide 1:Wire 3:Flat 4:Shaded--> |
| 108 | + <display_preference>4</display_preference> |
| 109 | + <!--Display opacity between 0.0 and 1.0--> |
| 110 | + <opacity>1</opacity> |
| 111 | + </DisplayGeometry> |
| 112 | + <DisplayGeometry> |
| 113 | + <!--Name of geometry file .vtp, .stl, .obj--> |
| 114 | + <geometry_file>sphere.vtp</geometry_file> |
| 115 | + <!--Color used to display the geometry when visible--> |
| 116 | + <color> 1 1 1</color> |
| 117 | + <!--Name of texture file .jpg, .bmp--> |
| 118 | + <texture_file /> |
| 119 | + <!--in body transform specified as 3 rotations (rad) followed by 3 translations rX rY rZ tx ty tz--> |
| 120 | + <transform> 0 0 0 0 0 0</transform> |
| 121 | + <!--Three scale factors for display purposes: scaleX scaleY scaleZ--> |
| 122 | + <scale_factors> 0.1 0.1 0.1</scale_factors> |
| 123 | + <!--Display Pref. 0:Hide 1:Wire 3:Flat 4:Shaded--> |
| 124 | + <display_preference>4</display_preference> |
| 125 | + <!--Display opacity between 0.0 and 1.0--> |
| 126 | + <opacity>1</opacity> |
| 127 | + </DisplayGeometry> |
| 128 | + </objects> |
| 129 | + <groups /> |
| 130 | + </GeometrySet> |
| 131 | + <!--Three scale factors for display purposes: scaleX scaleY scaleZ--> |
| 132 | + <scale_factors> 1 1 1</scale_factors> |
| 133 | + <!--transform relative to owner specified as 3 rotations (rad) followed by 3 translations rX rY rZ tx ty tz--> |
| 134 | + <transform> 0 0 0 0 0 0</transform> |
| 135 | + <!--Whether to show a coordinate frame--> |
| 136 | + <show_axes>true</show_axes> |
| 137 | + <!--Display Pref. 0:Hide 1:Wire 3:Flat 4:Shaded Can be overriden for individual geometries--> |
| 138 | + <display_preference>4</display_preference> |
| 139 | + </VisibleObject> |
| 140 | + </Body> |
| 141 | + </objects> |
| 142 | + <groups /> |
| 143 | + </BodySet> |
| 144 | + <!--List of Frames that various objects can be anchored to or expressed in, Body frames are builtin and not included in this list.--> |
| 145 | + <FrameSet> |
| 146 | + <objects> |
| 147 | + </objects> |
| 148 | + <groups /> |
| 149 | + </FrameSet> |
| 150 | + <!--List of joints that connect the bodies.--> |
| 151 | + <JointSet> |
| 152 | + <objects> |
| 153 | + <PinJoint name="pin1"> |
| 154 | + <!--List of connectors (structural dependencies) that this component has.--> |
| 155 | + <connectors> |
| 156 | + <Connector_PhysicalFrame_ name="parent_body"> |
| 157 | + <!--Name of the component this Connector should be connected to.--> |
| 158 | + <connectee_name>../ground</connectee_name> |
| 159 | + </Connector_PhysicalFrame_> |
| 160 | + <Connector_PhysicalFrame_ name="child_body"> |
| 161 | + <!--Name of the component this Connector should be connected to.--> |
| 162 | + <connectee_name>../rod1</connectee_name> |
| 163 | + </Connector_PhysicalFrame_> |
| 164 | + </connectors> |
| 165 | + <!--Location of the joint in the parent body specified in the parent reference frame. Default is (0,0,0).--> |
| 166 | + <location_in_parent>0 0 0</location_in_parent> |
| 167 | + <!--Orientation of the joint in the parent body specified in the parent reference frame. Euler XYZ body-fixed rotation angles (in radians) are used to express the orientation. Default is (0,0,0).--> |
| 168 | + <orientation_in_parent>0 0 0</orientation_in_parent> |
| 169 | + <!--Location of the joint in the child body specified in the child reference frame. Default is (0,0,0).--> |
| 170 | + <location_in_child>0 0.5 0</location_in_child> |
| 171 | + <!--Orientation of the joint in the child body specified in the child body reference frame. Euler XYZ body-fixed rotation angles (in radians) are used to express the orientation. Default is (0,0,0)--> |
| 172 | + <orientation_in_child>0 0 0</orientation_in_child> |
| 173 | + <!--Set holding the generalized coordinates (q's) that parmeterize this joint.--> |
| 174 | + <CoordinateSet> |
| 175 | + <objects> |
| 176 | + <Coordinate name="q1"> |
| 177 | + <!--Coordinate can describe rotational, translational, or coupled motion. Defaults to rotational.--> |
| 178 | + <motion_type>rotational</motion_type> |
| 179 | + <!--The value of this coordinate before any value has been set. Rotational coordinate value is in radians and Translational in meters.--> |
| 180 | + <default_value>-0.78539816</default_value> |
| 181 | + <!--The speed value of this coordinate before any value has been set. Rotational coordinate value is in rad/s and Translational in m/s.--> |
| 182 | + <default_speed_value>0</default_speed_value> |
| 183 | + <!--The minimum and maximum values that the coordinate can range between. Rotational coordinate range in radians and Translational in meters.--> |
| 184 | + <range>-1.57079633 1.57079633</range> |
| 185 | + <!--Flag indicating whether or not the values of the coordinates should be limited to the range, above.--> |
| 186 | + <clamped>false</clamped> |
| 187 | + <!--Flag indicating whether or not the values of the coordinates should be constrained to the current (e.g. default) value, above.--> |
| 188 | + <locked>false</locked> |
| 189 | + <!--If specified, the coordinate can be prescribed by a function of time. It can be any OpenSim Function with valid second order derivatives.--> |
| 190 | + <prescribed_function /> |
| 191 | + <!--Flag indicating whether or not the values of the coordinates should be prescribed according to the function above. It is ignored if the no prescribed function is specified.--> |
| 192 | + <prescribed>false</prescribed> |
| 193 | + </Coordinate> |
| 194 | + </objects> |
| 195 | + <groups /> |
| 196 | + </CoordinateSet> |
| 197 | + <!--Advanced option. Specify the direction of the joint in the multibody tree: parent->child (forward, reverse == false) or child->parent (reverse == true) NOTE: the Joint transform and its coordinates maintain a parent->child sense, even if the Joint is reversed.--> |
| 198 | + <reverse>false</reverse> |
| 199 | + </PinJoint> |
| 200 | + <PinJoint name="pin2"> |
| 201 | + <!--List of connectors (structural dependencies) that this component has.--> |
| 202 | + <connectors> |
| 203 | + <Connector_PhysicalFrame_ name="parent_body"> |
| 204 | + <!--Name of the component this Connector should be connected to.--> |
| 205 | + <connectee_name>rod1</connectee_name> |
| 206 | + </Connector_PhysicalFrame_> |
| 207 | + <Connector_PhysicalFrame_ name="child_body"> |
| 208 | + <!--Name of the component this Connector should be connected to.--> |
| 209 | + <connectee_name>rod2</connectee_name> |
| 210 | + </Connector_PhysicalFrame_> |
| 211 | + </connectors> |
| 212 | + <!--Location of the joint in the parent body specified in the parent reference frame. Default is (0,0,0).--> |
| 213 | + <location_in_parent>0 0 0</location_in_parent> |
| 214 | + <!--Orientation of the joint in the parent body specified in the parent reference frame. Euler XYZ body-fixed rotation angles (in radians) are used to express the orientation. Default is (0,0,0).--> |
| 215 | + <orientation_in_parent>0 0 0</orientation_in_parent> |
| 216 | + <!--Location of the joint in the child body specified in the child reference frame. Default is (0,0,0).--> |
| 217 | + <location_in_child>0 0.5 0</location_in_child> |
| 218 | + <!--Orientation of the joint in the child body specified in the child body reference frame. Euler XYZ body-fixed rotation angles (in radians) are used to express the orientation. Default is (0,0,0)--> |
| 219 | + <orientation_in_child>0 0 0</orientation_in_child> |
| 220 | + <!--Set holding the generalized coordinates (q's) that parmeterize this joint.--> |
| 221 | + <CoordinateSet> |
| 222 | + <objects> |
| 223 | + <Coordinate name="q2"> |
| 224 | + <!--Coordinate can describe rotational, translational, or coupled motion. Defaults to rotational.--> |
| 225 | + <motion_type>rotational</motion_type> |
| 226 | + <!--The value of this coordinate before any value has been set. Rotational coordinate value is in radians and Translational in meters.--> |
| 227 | + <default_value>-1.04719755</default_value> |
| 228 | + <!--The speed value of this coordinate before any value has been set. Rotational coordinate value is in rad/s and Translational in m/s.--> |
| 229 | + <default_speed_value>0</default_speed_value> |
| 230 | + <!--The minimum and maximum values that the coordinate can range between. Rotational coordinate range in radians and Translational in meters.--> |
| 231 | + <range>-1.57079633 1.57079633</range> |
| 232 | + <!--Flag indicating whether or not the values of the coordinates should be limited to the range, above.--> |
| 233 | + <clamped>false</clamped> |
| 234 | + <!--Flag indicating whether or not the values of the coordinates should be constrained to the current (e.g. default) value, above.--> |
| 235 | + <locked>false</locked> |
| 236 | + <!--If specified, the coordinate can be prescribed by a function of time. It can be any OpenSim Function with valid second order derivatives.--> |
| 237 | + <prescribed_function /> |
| 238 | + <!--Flag indicating whether or not the values of the coordinates should be prescribed according to the function above. It is ignored if the no prescribed function is specified.--> |
| 239 | + <prescribed>false</prescribed> |
| 240 | + </Coordinate> |
| 241 | + </objects> |
| 242 | + <groups /> |
| 243 | + </CoordinateSet> |
| 244 | + <!--Advanced option. Specify the direction of the joint in the multibody tree: parent->child (forward, reverse == false) or child->parent (reverse == true) NOTE: the Joint transform and its coordinates maintain a parent->child sense, even if the Joint is reversed.--> |
| 245 | + <reverse>false</reverse> |
| 246 | + </PinJoint> |
| 247 | + </objects> |
| 248 | + </JointSet> |
| 249 | + <!--Controllers that provide the control inputs for Actuators.--> |
| 250 | + <ControllerSet> |
| 251 | + <objects /> |
| 252 | + <groups /> |
| 253 | + </ControllerSet> |
| 254 | + <!--Constraints in the model.--> |
| 255 | + <ConstraintSet> |
| 256 | + <objects /> |
| 257 | + <groups /> |
| 258 | + </ConstraintSet> |
| 259 | + <!--Forces in the model (includes Actuators).--> |
| 260 | + <ForceSet> |
| 261 | + <objects /> |
| 262 | + <groups /> |
| 263 | + </ForceSet> |
| 264 | + <!--Markers in the model.--> |
| 265 | + <MarkerSet> |
| 266 | + <objects /> |
| 267 | + <groups /> |
| 268 | + </MarkerSet> |
| 269 | + <!--Geometry to be used in contact forces.--> |
| 270 | + <ContactGeometrySet> |
| 271 | + <objects /> |
| 272 | + <groups /> |
| 273 | + </ContactGeometrySet> |
| 274 | + </Model> |
| 275 | +</OpenSimDocument> |
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