Servo-Robotic Asymmetric Rotational Mixer With PID Control
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Solution Overview
Problem
Conventional asymmetric rotation mixers face challenges in achieving precise position and speed control, particularly due to inertial mismatch, which limits their integration into automated manufacturing processes and hinders efficient mixing of viscous or fine materials.
Innovation Solution
The use of a servo motor with a servo motor control system, including a position sensor and PID control, directly coupled to the rotational mount for precise angular position control, and a mixer control system with a user interface for setting and executing mixing profiles, along with a robotic arm for automated container handling and scanning of mixing profiles from labels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional asymmetric rotation mixers are used, then mixing capability is provided, but precise position and speed control is poor due to inertial mismatch
Solution Approach 1:
The patent employs a servo motor control system that incorporates feedback mechanisms to continuously monitor and adjust the rotational position and speed of the mixing container. This feedback loop compensates for inertial mismatch effects, maintaining precise control despite varying load conditions during asymmetric rotation mixing.
Solution Approach 2:
The system dynamically adjusts control parameters such as acceleration, deceleration, and velocity profiles based on real-time feedback. These parameter changes allow the mixer to adapt to inertial variations caused by asymmetric material distribution, ensuring consistent positioning accuracy and speed control throughout the mixing cycle.
2Extent of automation
If manual or semi-manual interfacing is used, then modest scale mixing is achieved, but integration into automated manufacturing processes is challenging
Solution Approach 1:
The mixer is designed with universal interfaces and standardized communication protocols that enable it to function both as a standalone manual/semi-manual device and as an integrated component of automated manufacturing systems. This multi-functionality allows the same hardware platform to serve different operational modes without requiring separate systems.
Solution Approach 2:
The patent introduces an intermediary control system that acts as a bridge between the mixer and automated manufacturing processes. This intermediary layer handles communication, coordinate transformation, and control signal adaptation, simplifying the integration complexity while enabling seamless automation connectivity.
3Manufacturing precision
If high speed mixing is implemented, then homogeneity is improved, but control precision deteriorates due to inertial effects
Solution Approach 1:
The system employs periodic acceleration and deceleration cycles with carefully controlled duty cycles. During high-speed mixing phases, the servo controller maintains precise angular position control through periodic feedback correction, allowing the mixture to achieve homogeneity while minimizing inertial distortion effects on positioning accuracy.
Data Source
AI summary
Devices, systems, and methods are provided for mixing by asymmetric rotation using a servo motor to drive the symmetric rotation. The system may include a robotic arm and robotic controller.