addLoiter

Add loiter mission item

Since R2022b

Syntax

addLoiter(mission,center,radius,duration)

addLoiter(___,Name=Value)

Description

addLoiter(mission,center,radius,duration) adds a loiter mission item to command the UAV to loiter around a center coordinate center, with a radius radius for a duration duration.

example

addLoiter(___,Name=Value) sets additional options specified by one or more name-value pair arguments in addition to all input arguments from the previous syntax. For example, addLoiter(mission,center,radius,duration,Frame="LocalNED") adds a loiter mission item with the center coordinates specified in the local north-east-down (NED) reference frame.

Examples

collapse all

Create UAV Mission Manually

Open Live Script

Create a UAV mission object with a home location at the origin of the local ENU coordinate frame and an initial speed of 5 meters per second.

m = uavMission(Frame="LocalENU",HomeLocation=[0 0 0],Speed=5)

m = 
  uavMission with properties:

       HomeLocation: [0 0 0]
         InitialYaw: 0
              Frame: "LocalENU"
              Speed: 5
    NumMissionItems: 0

Add a takeoff mission item to the mission with an altitude of 25 meters, pitch of 15 degrees, and yaw of 0 degrees.

addTakeoff(m,20,Pitch=15,Yaw=0);

Add two waypoint mission items to the mission. Between the two waypoints, increase the speed of the UAV to 20 meters per second. After the second waypoint, reduce the speed of the UAV back to 5 meters per second.

addWaypoint(m,[10 0 30]);
addChangeSpeed(m,20)
addWaypoint(m,[20 0 40]);
addChangeSpeed(m,5)
addWaypoint(m,[30 0 50])

Add loiter and hover mission items to the mission, specifying for the UAV to loiter and hover around the second waypoint at a radius of 50 meters for 20 seconds each.

addLoiter(m,[40 0 60],10,20);
addHover(m,[50 0 70],10,20);

Add a landing mission item to the mission to land the UAV.

addLand(m,[70 0 0],Yaw=0);

Show the mission item data table.

showdetails(m)

ans=9×17 table
    Idx    Timestamp     MissionType     ParameterName1    ParameterValue1    ParameterName2    ParameterValue2    ParameterName3    ParameterValue3    ParameterName4    ParameterValue4      ParameterName5      ParameterValue5    ParameterName6    ParameterValue6    ParameterName7    ParameterValue7
    ___    _________    _____________    ______________    _______________    ______________    _______________    ______________    _______________    ______________    _______________    __________________    _______________    ______________    _______________    ______________    _______________

     1        NaN       "Takeoff"          "Altitude"            20              "Pitch"               15              "Yaw"                 0             ""                   NaN          ""                          NaN                ""                NaN                ""                NaN      
     2        NaN       "Waypoint"         "X"                   10              "Y"                    0              "Z"                  30             "Yaw"                NaN          "AcceptanceRadius"          NaN                ""                NaN                ""                NaN      
     3        NaN       "ChangeSpeed"      "Speed"               20              ""                   NaN              ""                  NaN             ""                   NaN          ""                          NaN                ""                NaN                ""                NaN      
     4        NaN       "Waypoint"         "X"                   20              "Y"                    0              "Z"                  40             "Yaw"                NaN          "AcceptanceRadius"          NaN                ""                NaN                ""                NaN      
     5        NaN       "ChangeSpeed"      "Speed"                5              ""                   NaN              ""                  NaN             ""                   NaN          ""                          NaN                ""                NaN                ""                NaN      
     6        NaN       "Waypoint"         "X"                   30              "Y"                    0              "Z"                  50             "Yaw"                NaN          "AcceptanceRadius"          NaN                ""                NaN                ""                NaN      
     7        NaN       "Loiter"           "X"                   40              "Y"                    0              "Z"                  60             "Radius"              10          "Duration"                   20                ""                NaN                ""                NaN      
     8        NaN       "Hover"            "X"                   50              "Y"                    0              "Z"                  70             "Radius"              10          "Duration"                   20                ""                NaN                ""                NaN      
     9        NaN       "Land"             "X"                   70              "Y"                    0              "Z"                   0             "Yaw"                  0          ""                          NaN                ""                NaN                ""                NaN

Remove the hover action at index 7, and then add another waypoint at index 8 after the hover item moves to index 7. Show the mission details table again to see the changes.

removeItem(m,7);
addWaypoint(m,[65 0 70],InsertAtRow=8);
showdetails(m)

ans=9×17 table
    Idx    Timestamp     MissionType     ParameterName1    ParameterValue1    ParameterName2    ParameterValue2    ParameterName3    ParameterValue3    ParameterName4    ParameterValue4      ParameterName5      ParameterValue5    ParameterName6    ParameterValue6    ParameterName7    ParameterValue7
    ___    _________    _____________    ______________    _______________    ______________    _______________    ______________    _______________    ______________    _______________    __________________    _______________    ______________    _______________    ______________    _______________

     1        NaN       "Takeoff"          "Altitude"            20              "Pitch"               15              "Yaw"                 0             ""                   NaN          ""                          NaN                ""                NaN                ""                NaN      
     2        NaN       "Waypoint"         "X"                   10              "Y"                    0              "Z"                  30             "Yaw"                NaN          "AcceptanceRadius"          NaN                ""                NaN                ""                NaN      
     3        NaN       "ChangeSpeed"      "Speed"               20              ""                   NaN              ""                  NaN             ""                   NaN          ""                          NaN                ""                NaN                ""                NaN      
     4        NaN       "Waypoint"         "X"                   20              "Y"                    0              "Z"                  40             "Yaw"                NaN          "AcceptanceRadius"          NaN                ""                NaN                ""                NaN      
     5        NaN       "ChangeSpeed"      "Speed"                5              ""                   NaN              ""                  NaN             ""                   NaN          ""                          NaN                ""                NaN                ""                NaN      
     6        NaN       "Waypoint"         "X"                   30              "Y"                    0              "Z"                  50             "Yaw"                NaN          "AcceptanceRadius"          NaN                ""                NaN                ""                NaN      
     7        NaN       "Hover"            "X"                   50              "Y"                    0              "Z"                  70             "Radius"              10          "Duration"                   20                ""                NaN                ""                NaN      
     8        NaN       "Waypoint"         "X"                   65              "Y"                    0              "Z"                  70             "Yaw"                NaN          "AcceptanceRadius"          NaN                ""                NaN                ""                NaN      
     9        NaN       "Land"             "X"                   70              "Y"                    0              "Z"                   0             "Yaw"                  0          ""                          NaN                ""                NaN                ""                NaN

Visualize the mission.

show(m);
axis equal

Figure contains an axes object. The axes object with xlabel East (m), ylabel North (m) contains 10 objects of type line, text.

Input Arguments

collapse all

`mission` — UAV mission
`uavMission` object

UAV mission, specified as a uavMission object.

`center` — Center coordinate
three-element row vector

Center coordinate, specified as a three-element row vector. The form of the vector depends on the reference frame, as specified by either the uavMission object mission or the Frame argument:

"Global" — [latitude longitude altitude]
"GlobalRelativeAlt" — [latitude longitude relativeAltitude]. relativeAltitude is the altitude relative to the home location specified by mission.
"LocalENU" — [X Y Z]
"LocalNED" — [X Y Z]

Specify latitude and longitude in degrees, and altitude or relative altitude in meters. Local coordinates are in meters.

Example: [40 20 40]

`radius` — Loiter radius
nonnegative numeric scalar

Loiter radius, specified as a nonnegative numeric scalar, in meters.

Example: 3

`duration` — Loiter duration
nonnegative numeric scalar

Loiter duration, specified as a nonnegative numeric scalar, in seconds.

Example: 5

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Example: addLoiter(mission,[30 60 10],10,5,Frame="LocalNED")

`Frame` — Mission waypoint reference frame
`mission.Frame` (default) | `"Global"` | `"GlobalRelativeAlt"` | `"LocalENU"` | `"LocalNED"`

Mission waypoint reference frame, specified as one of these values:

"Global" — Global reference frame
"GlobalRelativeAlt" — Global reference frame with an altitude relative to the home location specified by mission
"LocalENU" — Local east-north-up (ENU) reference frame
"LocalNED" — Local north-east-down (NED) reference frame

If you do not specify the Frame argument, addLoiter uses the reference frame of the uavMission object mission.

Data Types: char | string

`Timestamp` — Timestamp
numeric scalar

Timestamp of this item, specified as a numeric scalar, in seconds.

If you do not specify the Timestamp argument, addLoiter determines the timestamp automatically based on the reference speed of the uavMission object.

`InsertAtRow` — Item position in mission order
positive integer

Item position in the mission order, specified as an positive integer.

If you do not specify the Timestamp argument or you specify a value that is greater than the total number of items in the mission, the item is inserted after the last item as the next index value.

Version History

Introduced in R2022b

addLoiter

Syntax

Description

Examples

Create UAV Mission Manually

Input Arguments

`mission` — UAV mission
`uavMission` object

`center` — Center coordinate
three-element row vector

`radius` — Loiter radius
nonnegative numeric scalar

`duration` — Loiter duration
nonnegative numeric scalar

Name-Value Arguments

`Frame` — Mission waypoint reference frame
`mission.Frame` (default) | `"Global"` | `"GlobalRelativeAlt"` | `"LocalENU"` | `"LocalNED"`

`Timestamp` — Timestamp
numeric scalar

`InsertAtRow` — Item position in mission order
positive integer

Version History

See Also

Objects

Functions

addLoiter

Syntax

Description

Examples

Create UAV Mission Manually

Input Arguments

mission — UAV mission uavMission object

center — Center coordinate three-element row vector

radius — Loiter radius nonnegative numeric scalar

duration — Loiter duration nonnegative numeric scalar

Name-Value Arguments

Frame — Mission waypoint reference frame mission.Frame (default) | "Global" | "GlobalRelativeAlt" | "LocalENU" | "LocalNED"

Timestamp — Timestamp numeric scalar

InsertAtRow — Item position in mission order positive integer

Version History

See Also

Objects

Functions

`mission` — UAV mission
`uavMission` object

`center` — Center coordinate
three-element row vector

`radius` — Loiter radius
nonnegative numeric scalar

`duration` — Loiter duration
nonnegative numeric scalar

`Frame` — Mission waypoint reference frame
`mission.Frame` (default) | `"Global"` | `"GlobalRelativeAlt"` | `"LocalENU"` | `"LocalNED"`

`Timestamp` — Timestamp
numeric scalar

`InsertAtRow` — Item position in mission order
positive integer