Servo-Pneumatic Soft Gripper Control for Adaptive Force Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional robotic grippers are expensive and ineffective in handling objects with varying weights, sizes, and shapes, particularly in environments where uncertainty and variability are high, due to their rigidity and inability to adapt.
Innovation Solution
The development of servo-pneumatic control systems for soft robotic actuators, which utilize elastomeric materials and fluid pressure to create adaptive, lightweight, and customizable grippers that can conform to objects and control pressure and flow to achieve precise motion and grasping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional robotic grippers are used, then grasping force and structural strength are improved, but adaptability to objects with varying weights, sizes, and shapes deteriorates
Solution Approach 1:
The patent employs soft robotic actuators with flexible elastomeric structures that can deform and conform to objects of varying shapes, sizes, and weights. The flexible gripper fingers are composed of soft materials that allow adaptive wrapping around objects while maintaining sufficient grasping force through pneumatic actuation.
Solution Approach 2:
The system implements dynamic control through servo-pneumatic actuators that can rapidly adjust pressure and flow to modify the gripper's shape and force output in real-time. This allows the gripper to adapt its mechanical properties during operation to match the specific characteristics of different objects being manipulated.
2Manufacturing precision
If conventional robotic grippers are used, then manufacturing precision and structural rigidity are improved, but cost and complexity increase
Solution Approach 1:
The patent utilizes pneumatic actuation systems to control the soft robotic gripper, replacing complex mechanical transmission systems with simpler pneumatic circuits. Servo-pneumatic valves provide precise control of air pressure and flow to the elastomeric actuators, achieving accurate motion control without the mechanical complexity of traditional robotic grippers.
Solution Approach 2:
The system changes the physical state and parameters of the elastomeric materials through pneumatic pressure control, allowing the gripper to transition between different stiffness and shape configurations. This enables a single simple structure to achieve multiple functional states that would otherwise require complex mechanical systems.
3Adaptability or versatility
If soft robotic actuators with servo-pneumatic control are used, then adaptability and object conformity are improved, but response bandwidth and control precision may deteriorate
Solution Approach 1:
The patent implements closed-loop feedback control systems that continuously monitor the position, force, and pressure of the soft robotic actuators. This feedback is used by servo controllers to adjust pneumatic valve actuation in real-time, ensuring rapid and precise response despite the inherent compliance of soft materials. The feedback mechanism compensates for the slower response characteristics of pneumatic systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The servo-pneumatic control systems enable soft robotic actuators to efficiently grasp and manipulate objects without damage, offering high response bandwidth, precise force control, and immunity to external disturbances, while being cost-effective and adaptable to diverse environments.
Implementation Method 1
servo-pneumatic control systems for soft robotic actuators, which utilize elastomeric materials and fluid pressure to create adaptive, lightweight, and customizable grippers
Implementation Method 2
utilize elastomeric materials and fluid pressure to create adaptive, lightweight, and customizable grippers that can conform to objects
Data Source
AI summary
Exemplary embodiments relate to the use of servo-pneumatic control systems for actuation and de-actuation of soft robotic actuators. Apparatuses and methods are disclosed for using a servo-pneumatic control system in fluid communication with the soft robotic actuator and configured to maintain a closed loop in which at least one of pressure, mass of fluid, or volume of fluid is controlled within the soft robotic actuator. The embodiments may be used to prevent deformation of grasped objects; detect grasping, collision, and releasing objects; and other operations with a rapid servo-pneumatic response.