Universal Actuator Driver Control With Single-Terminal Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing infusion pump devices require different actuators and controllers, leading to increased size and complexity due to the need for multiple general-purpose input/output terminals to support various types of actuators, which is undesirable for portable medical devices.
Innovation Solution
An extensible electromechanical actuator driver module with a single input terminal that converts input command signals into driver commands for various types of actuators, using duty cycle measurement and decoding logic to generate appropriate output signals, eliminating the need for additional enable signals and reducing the number of output terminals required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different types of actuators are supported using multiple general purpose input/output terminals, then adaptability is improved, but device complexity and size increase
Solution Approach 1:
The patent implements a universal actuator driver module that can control multiple types of electromechanical actuators (stepper motors, brushless DC motors, brushed DC motors) using a single controller with a limited number of GPIO terminals. The controller achieves multi-functionality by dynamically reconfiguring its output signals based on the detected actuator type, eliminating the need for dedicated hardware for each actuator variant and thereby reducing device complexity while maintaining adaptability
2Adaptability or versatility
If a common microcontroller is programmed to support different actuator types, then adaptability is improved, but the number of required GPIO terminals increases
Solution Approach 1:
The patent employs parameter changes by detecting the actuator type through electrical characteristics (such as back-EMF detection for brushless DC motors versus current sensing for brushed DC motors) and dynamically adjusting control parameters including PWM frequency, duty cycle ranges, and current limiting thresholds. This allows a single microcontroller with fixed GPIO terminals to adapt to different actuator types by modifying software-controlled parameters rather than requiring additional hardware terminals
3Reliability
If multiple enable signals and output terminals are provided for different actuators, then reliability is improved, but device size increases
Solution Approach 1:
The patent extracts and eliminates redundant control signals by implementing a unified control architecture that uses a single enable terminal and a limited set of output terminals for all actuator types. The controller intelligence is enhanced to handle actuator-specific control requirements through software logic and parameter adjustment rather than dedicated hardware signals, thereby reducing the controller area while maintaining reliability through intelligent signal management
Data Source
AI summary
Electromechanical actuation systems and related operating methods are provided. A method of controlling an electromechanical actuator in response to an input command signal at an input terminal involves determining a commanded actuation state value based on a characteristic of the input command signal, generating driver command signals based on the commanded actuation state value and an actuator type associated with the electromechanical actuator, and operating driver circuitry in accordance with the driver command signals to provide output signals at output terminals coupled to the electromechanical actuator.