Flexible robotic actuators
Systems and methods for providing flexible robotic actuators are disclosed. Some embodiments of the disclosed subject matter include a soft robot capable of providing a radial deflection motions; a soft tentacle actuator capable of providing a variety of motions and providing transportation means for various types of materials; and a hybrid robotic system that retains desirable characteristics of both soft robots and hard robots. Some embodiments of the disclosed subject matter also include methods for operating the disclosed robotic systems.
1. A robotic system comprising:
a soft robot comprising;
an actuator comprising an elastomeric material and a strain limiting core structure embedded in the elastomeric material, the strain limiting core structure having a higher elastic modulus than the elastomeric material;
a plurality of fluid channels embedded in the actuator and arranged symmetrically around the core structure, each fluid channel comprising a plurality of sections along the length of the actuator;
a plurality of tubings in the core structure, each tubing coupled to one of the plurality of sections;
a plurality of pressurizing inlets, wherein each pressurizing inlet is coupled to one of the plurality of sections and configured to receive a pressurized fluid to independently pressurize one of the plurality of sections to cause a movement of the soft robot; and
a robotic control system coupled to the soft robot, wherein the robotic control system is configured to provide the pressurized fluid to the plurality pressurizing inlets, wherein the plurality of fluid channels is arranged so that a bending direction of the actuator changes as a function of a pressure level in respective sections of the fluid channels.
2. The robotic system of claim 1 , further comprising one or more pumps and one or more valves, wherein the one or more pumps and one more valves are coupled to the plurality of pressurizing inlets.
3. The robotic system of claim 2 , wherein each of the one or more pumps is coupled to one of the plurality of fluid channels, and each of the one or more valves is coupled to one of the plurality of fluid channels.
4. The robotic system of claim 3 , wherein the robotic control system is configured to actuate the actuator using an actuation sequence associated with the plurality of fluid channels, wherein in the actuation sequence, one of the one or more pumps and one of the one or more valves are selected to actuate, independently, one of the plurality of fluid channels that the pump and valve are coupled to.
5. The robotic system of claim 2 , wherein each of the one or more pumps is coupled to the one or more of the plurality of sections, and each of the one or more valves is coupled to the one or more of the plurality of sections.
6. The robotic system of claim 5 , wherein each of the plurality of sections is independently actuated by one of the plurality of pumps and one of the plurality of valves coupled to the said section.
7. The robotic system of claim 1 , wherein the robotic control system is configured to actuate the actuator using an actuation sequence associated with the plurality of fluid channels.
8. The robotic system of claim 1 , wherein the plurality of tubings are configured to transfer fluid, solid particles, or combinations thereof.
9. The robotic system of claim 8 , wherein the plurality of tubings are a plurality of pumping channels.
10. The robotic system of claim 1 , wherein the plurality of tubings are a plurality of delivery channels.
11. The robotic system of claim 10 , wherein each of the plurality of delivery channels delivers gas, liquids, colloidal suspensions, or aerosols from a reservoir to the actuator.
12. The robotic system of claim 1 , further comprising one or more suction channels.
13. The robotic system of claim 12 , wherein the one or more suction channels are connected to a source of gas or a reduced pressure.
14. The robotic system of claim 13 , wherein the source of a reduced pressure is a mechanical pump, a vacuum line, or a vacuum cleaner.
15. The robotic system of claim 1 , further comprising a camera module.
16. The robotic system of claim 15 , wherein the camera module comprises one or more image sensors for capturing image or video information surrounding the robotic system.
17. The robotic system of claim 15 , wherein the actuator is configured to be actuated in response to an image captured by the camera module.
18. The robotic system of claim 1 , further comprising one or more sensors.
19. The robotic system of claim 18 , wherein one of the one or more sensors is a bump sensor for detecting an obstacle.
20. The robotic system of claim 1 , further comprising a hard robot coupled to the soft robot and configured to provide locomotion to the robotic system.
21. A method of operating a robotic system, the method comprising:
providing the robotic system according to claim 1 ;
actuating the actuator using an actuation sequence by the robotic control system.
22. The method of claim 21 , wherein the robotic control system comprises one or more pumps and one or more valves.
23. The method of claim 22 , wherein the method further comprises at least one step of (a) closing one of the one or more valves, (b) turning on one of the one or more pumps to pressurize one of the plurality of sections, (c) turning off the one of the one or more pumps while keeping the one of the one or more valves closed, and (d) opening the one of the one or more valves to deflate one of the plurality of sections, according to the actuation sequence.
24. The robotic system of claim 1 , wherein the plurality of tubings are embedded in the core structure.