Electric Actuator Control Using a Physical Load Model
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive systems with electric actuators face complexity in control logic configuration and require significant time and effort to tune parameters, especially when dealing with mechanical contact and kinetic energy attenuation.
Innovation Solution
A drive system comprising a motor-driven actuator, a driver, and a controller that creates a physical model based on external load displacement, allowing for controlled displacement and angular frequency settings to mimic ideal spring behavior, thereby simplifying control logic configuration and simulation for facility design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional mechanical configurations (springs, dampers, air cylinders) are used to attenuate kinetic energy, then the attenuation performance is determined by physical characteristics, but the system cannot control forces less than or equal to its own weight and requires complex design mechanisms
Solution Approach 1:
The patent replaces traditional mechanical attenuation mechanisms (springs, dampers, air cylinders) with an electric actuator system driven by a motor. This substitution allows for electronic control of force generation, enabling the system to handle forces less than or equal to its own weight without requiring complex mechanical design mechanisms.
Solution Approach 2:
The patent changes the control parameter from fixed physical characteristics (spring constant, orifice diameter) to variable electrical control parameters. The controller can dynamically adjust the motor's output to match the required force, providing flexible control over the full range of forces including those less than or equal to the actuator's weight.
2Ease of operation
If electric actuators with complex control logic are used, then the actuator can be controlled based on sensing results, but the control logic configuration becomes complicated and requires significant time and effort to tune parameters
Solution Approach 1:
The patent uses a physical model that copies the essential characteristics of the target object (mass, desired motion behavior) to generate control instructions. Instead of requiring complex control logic configuration, the system creates a simplified physical model representation of the object and uses this model to automatically generate appropriate control signals, significantly reducing parameter tuning time.
Solution Approach 2:
The system performs self-configuration by automatically creating control instructions based on the physical model of the target object. The controller derives the necessary control parameters from the object's physical characteristics without requiring manual tuning, enabling the system to adapt to different objects quickly and easily.
Data Source
AI summary
A drive system includes an actuator that is driven by a motor to generate displacement, a driver that drives the motor, and a controller that gives a control instruction to the driver. The controller includes a model creation unit that creates a physical model based on displacement caused by application of an external load to the actuator and an instruction generating unit that generates a control instruction such that the actuator generates displacement according to the physical model.