Apparatuses, systems, and methods for cleaning

1. A cleaning apparatus comprising:

a base rotatable about a base axis of rotation;

an extendable arm;

a nozzle assembly; and

a cleaning arm supported on the extendable arm and supporting the nozzle assembly, wherein the cleaning arm comprises:

a nozzle support connected to the extendable arm;

at least two first arm members, wherein each arm member is attached to the nozzle support, and wherein each first arm member is rotatable about an arm axis of rotation relative to the nozzle support, and wherein

the arm axes of rotation of the at least two first arm members are offset from each other; and

at least one sensor configured to detect a position of the nozzle assembly based on rotation at least one of the at least two first arm members,

wherein the extendable arm is extendable along an extendable arm axis that is parallel to the base axis of rotation such that a distance between the nozzle support and the base is adjustable, and

wherein the base axis of rotation is not parallel to the first axes of rotation of the at least two first arm members.

2. The cleaning apparatus of claim 1 , wherein each first arm member comprises a fixed end and a rotating end, and wherein, for each first arm member, the fixed end is in a fixed position relative to the first axis of rotation and the rotating end is rotatable about the first axis of rotation and relative to the fixed end.

3. The cleaning apparatus of claim 1 , wherein the base axis of rotation is perpendicular to the first axes of rotation.

4. The cleaning apparatus of claim 1 , wherein the cleaning arm further comprises a second arm member attached to one of the at least two first arm members, wherein the second arm member is rotatable about a second axis of rotation, and wherein the second axis of rotation is perpendicular to the first axis of rotation of the one of the at least two first arm members.

5. The cleaning apparatus of claim 1 , wherein the first arm member comprises a first hinge connector, a second hinge connector, and a first actuator assembly.

6. The cleaning apparatus of claim 5 , wherein the first hinge connector is fixedly attached to a plate and the second hinge connector is rotatably attached to the first actuator assembly such that the second hinge connector rotates around the first axis of rotation relative to the first hinge connector.

7. The cleaning apparatus of claim 1 , wherein the at least two first arm members comprises a first first arm member and a second first arm member, wherein the at least one sensor comprises a first sensor attached to the first first arm member and a second sensor attached to the second first arm member.

8. The cleaning apparatus of claim 1 , wherein rotation of the rotatable base rotates the extendable arm and the cleaning arm.

9. The cleaning apparatus of claim 1 , wherein the cleaning arm is coupled to the extendable arm via the nozzle support.

10. The cleaning apparatus of claim 1 , wherein the nozzle assembly is a first nozzle assembly, the at least two first arm members comprise a first first arm member and a second first arm member, and wherein the cleaning apparatus comprises:

a second nozzle assembly;

a first second arm member supported on the first first arm member; and

a second second arm member supported on the second first arm member and rotatable about a second axis of rotation of the second second arm member that is not parallel to the first axis of rotation of the second first arm member,

wherein the second nozzle assembly is supported on the second second arm member.

11. The cleaning apparatus of claim 10 , wherein the first axis of rotation of the second first arm member is substantially parallel to the first axis of rotation of the first first arm member.