Robotic Vacuum Gripper Control for Unstable Seal Quality
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Solution Overview
Problem
Existing robotic grippers face challenges in achieving a secure grasp on objects due to inconsistent vacuum assembly seals, leading to inefficiencies and the need for multiple specialized robots or loosely integrated systems that are slow and inflexible.
Innovation Solution
Intelligent control of individual vacuum assemblies in a robotic gripper, including activation, reactivation, and deactivation based on seal quality, location, and mask information, to enhance grasp quality and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple vacuum assemblies are used to improve grasp quality, then the reliability of grasping is improved, but the device complexity increases
Solution Approach 1:
The gripper is divided into multiple independently controllable vacuum assemblies (e.g., suction cups), each capable of forming a seal with the object surface. This segmentation allows individual assemblies to be activated or deactivated based on seal quality, improving overall grasp reliability while maintaining manageable complexity through modular design
Solution Approach 2:
Different vacuum assemblies are assigned different control strategies based on their local conditions. The system evaluates seal quality at each assembly location and adjusts activation status accordingly, enabling optimized grasp performance tailored to specific regions of the gripper-object interface
2Reliability
If vacuum assemblies are deactivated when seal quality is poor, then the grasp quality is improved, but the productivity decreases due to retry attempts
Solution Approach 1:
The system performs preliminary evaluation of seal quality before finalizing the grasp. When an assembly shows poor seal quality, it is deactivated in advance and marked for potential reactivation later, allowing the system to prepare for retry attempts without delaying the overall grasp completion
Solution Approach 2:
The control system implements periodic reevaluation of vacuum assemblies during the grasp sequence. Disabled assemblies can be reactived in subsequent periods if conditions have improved, enabling iterative optimization of grasp quality while maintaining progress toward task completion
3Adaptability or versatility
If individual vacuum assemblies are controlled independently, then the adaptability to different objects is improved, but the control complexity increases
Solution Approach 1:
The control system dynamically adjusts the activation state of individual vacuum assemblies based on real-time seal quality feedback. This dynamic control enables the gripper to adapt to various object shapes, sizes, and surface properties by selectively engaging assemblies that form good seals while deactivating those that do not
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor seal quality at each vacuum assembly location. Based on this feedback, the control algorithm automatically adjusts assembly activation status, enabling adaptive grasping performance while managing control complexity through closed-loop regulation
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
Improves grasp quality and efficiency by optimizing vacuum assembly control, enabling a single robot to perform multiple tasks with agility and speed, reducing the need for multiple specialized robots and enhancing system integration.
Implementation Method 1
a vacuum-based gripper... engaging a large number of vacuum assemblies with the object
Implementation Method 2
vacuum assemblies of the gripper that are able to form a good seal with the object being manipulated
Data Source
AI summary
Methods and apparatus for controlling a robotic gripper of a robotic device are provided. The method includes activating a plurality of vacuum assemblies of the robotic gripper to grasp one or more objects, disabling one or more of the plurality of vacuum assemblies having a seal quality with the one or more objects that is less than a first threshold, assigning a score to each of the one or more disabled vacuum assemblies, reactivating the one or more disabled vacuum assemblies in an order based, at least in part, on the assigned scores, and grasping the one or more objects with the robotic gripper when a grasp quality of the robotic gripper is higher than a second threshold.