Allows the creation of an inline joint primitive.
Format:
Example:
Description:
constraint create primitive_joint inline
jprim_name = new primitive joint adams_id = integer
comments = string i_part_name = existing body j_part_name = existing body
location = location Orientation = orientation along_axis_orientation = location
in_plane_orientation = location
relative_to = existing model, part or marker i_marker_name = existing marker
j_marker_name = existing marker
constraint create primitive_joint inline &
jprim_name = JPRIM__1 &
i_marker_name = MARKER_10 &
j_marker_name = MARKER_12
Parameter Value Type Description
jprim_name New primitive joint name
Specifies the name of the new jprim. You may use this name later to refer to this jprim.
adams_id Integer Specifies an integer used to identify this element in the Adams data file.
comments String Specifies comments for the object being created
or modified.
Adams/View Commands constraint create primitive_joint inline 96
Extended Definition:
1. Adams/View will not allow you to have two jprims with the same full name, so you must provide a unique name.
Normally, entity names are composed of alphabetic, numeric, or '_' (underscore) characters, and start with an alphabetic or '_' character. They may be any length.
By enclosing the name in double quotes, you may use other printable characters, or start the name with a numeral. If a name contains characters, or starts with a numeral, you must always quote the name when entering it.
Note that you can specify the parentage of an entity (e.g. what part "owns" a marker or a geometry element) when you CREATE it by changing the name. If you enter just the entity name, then the default parent will be assigned by Adams/View. If you type in the full name, then you may over ride the default parent. In most cases, when creating an entity, Adams/View will provide a default name. The default name that Adams/View provides will specify the parentage that it has assumed.
You may, or course, delete this name and use your own. The form of a full name is:
"...._NAME.GRAND_PARENT_NAME.PARENT_NAME.ENTITY_NAME"
i_part_name Existing body Specifies the part that is the first of two parts connected by this joint.
j_part_name Existing body Specifies the part that is the second of two parts connected by this joint.
location Location Specifies the locations to be used to define the position of a constraint during its creation.
orientation Orientation Specifies the orientation of the J marker for the constraint being created using three rotation angles.
along_axis_orientation Location Specifies the orientation of a coordinate system (e.g. marker or part) by directing one of the axes. Adams/View will assign an arbitrary rotation about the axis.
in_plane_orientation Location Specifies the orientation of a coordinate system (e.g. marker or part) by directing one of the axes and locating one of the coordinate planes.
relative_to Existing model, part or marker
Specifies the coordinate system that location coordinates and orientation angles are with respect to.
i_marker_name Existing marker Specifies a marker on the first of two parts connected by this joint.
j_marker_name Existing marker Specifies a marker on the second of two parts connected by this joint.
Parameter Value Type Description
The number of levels used varies from case to case and the parentage must exist before an entity can be assigned to it.
2. When you use the FILE ADAMS_DATA_SET WRITE command, Adams/View writes an Adams data file for your model. Adams requires that each modeling element be identified by a unique integer identifier. If you use this parameter to specify a non-zero identifier, Adams/View will use it in the corresponding statement in the Adams data file.
You may also enter zero as an identifier, either explicitly or by default. The next time you write an Adams file, Adams/View will replace the zero with a unique, internally-generated identifier.
Adams/View will permanently store this identifier with the element just as if you had entered it yourself.
Normally, you would let all identifiers default to zero, and Adams/View would generate the identifiers for you. You are never required to enter a non-zero identifier. You only need to specify it if, for some reason, you wish to control the Adams file output.
3. For the location parameter, the I and J markers will be automatically created at this location on the I_PART_NAME and J_PART_NAME respectively.
By default, you supply Cartesian (x, y, z) coordinates. You may use the 'defaults units coordinate_system_type =' command to change this convention. For example, selecting 'cylindrical' means you will subsequently be supplying r, theta, and z coordinates.
Adams/View applies your location coordinates in the coordinate system you identify with the RELATIVE_TO parameter. The default for the RELATIVE_TO parameter is the default coordinate system. (See the RELATIVE_TO parameter for this command).
4. The I marker is oriented based on the J marker orientation and the requirements of the particular constraint being created. These markers are created automatically.
Adams/View will orient the coordinate system by starting from the initial coordinate system and applying three successive rotations. Depending on the convention you have selected, the rotations may occur about space-fixed or body-fixed axes in any meaningful combination of the x, y, and z axes.
By default, you supply Euler (body313, or body-fixed z, x, z) angles. You may change this convention with the 'DEFAULTS UNITS ORIENTATION_TYPE=' command. For example, selecting SPACE123 means you will subsequently be supplying space-fixed x, y, and z angles.
Adams/View applies your orientation angles starting from the coordinate system you identify with the RELATIVE_TO parameter. The default for the RELATIVE_TO parameter is the default coordinate system.
5. You may enter either one or two locations to direct the axis. If you enter one location, the axis will point toward the location. If you specify two locations, the axis will be parallel to, and pointing the same way as, the vector from the first location to the second.
Note that this does not completely dictate the orientation of the coordinate system. Adams/View will position the coordinate system with an arbitrary rotation about the axis. If you must completely control the coordinate system orientation, use ORIENTATION or
IN_PLANE_ORIENTATION.
Adams/View Commands constraint create primitive_joint inline 98
By default, you direct the Z axis of the coordinate system. You may change this convention with the 'DEFAULTS ORIENT_AXIS_AND_PLANE AXIS_AND_PLANE_SETTING=' command.
For example, selecting either X_AXIS_XY_PLANE or X_AXIS_XZ_PLANE means you will subsequently be directing the X axis. The plane-convention setting does not affect this parameter.
Adams/View applies your location coordinates in the coordinate system you identify with the RELATIVE_TO parameter. The default for the RELATIVE_TO parameter is the default coordinate system.
6. For the “in_plane_orientation” parameter, you may enter either two or three locations. If you enter two locations, the axis will point toward the first location and the plane will fall on the second. If you specify three locations, the axis will be parallel to, and pointing the same way as, the vector from the first location to the second and the plane will be parallel to the plane defined by the three locations.
By default, you direct the Z axis of the coordinate system and locate the ZX plane. You may use the 'DEFAULTS ORIENT_AXIS_AND_PLANE AXIS_AND_PLANE_SETTING=' command to change this convention. For example, selecting X_AXIS_XY_PLANE means you will subsequently be directing the X axis and locating the XY plane.
Adams/View applies your location coordinates in the coordinate system you identify with the RELATIVE_TO parameter. The default for the RELATIVE_TO parameter is the default coordinate system.
7. If the “relative_to” parameter is not specified, the default coordinate system is used. The default coordinate system is initially your model, i.e. the global coordinate system. You may change the default coordinate system using the 'defaults coordinate_system' command.
8. An inline joint primitive indicates a four-degree-of-freedom joint primitive that allows one translational and three rotational motions of one part with respect to another.
For an inline primitive, Adams imposes two translational constraints, which confine the translational motion of the I marker to the line defined by the z-axis of the J marker.
Tip: Adams/View connects one part at the I marker to the other at the J marker. These markers are automatically generated using this method of joint creation.