Electro-Hydraulic Actuator Speed Tuning via HMI Gain Adjustment
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Solution Overview
Problem
Conventional hydraulic actuator systems do not allow operators to modify actuator speed characteristics once the spool design is determined, limiting adaptability to operator and environmental needs, whereas electro-hydraulic systems lack the capability for operator-driven tuning through human machine interfaces.
Innovation Solution
An operator self-tuning method using an electro-hydraulic actuator system that allows operators to adjust actuator speed and acceleration characteristics via a human machine interface (HMI) by selecting electro-hydraulic actuator systems, displaying mapping relationships, and modifying maximum speed and acceleration values through button presses, with changes stored in the upper controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional hydraulic actuator system with fixed spool design is used, then manufacturing simplicity is maintained, but actuator speed characteristics cannot be modified
Solution Approach 1:
The patent replaces the conventional purely mechanical hydraulic spool design with an electro-hydraulic system that incorporates electronic control components (microprocessor, memory, sensors) to enable software-based tuning of actuator speed characteristics, thereby achieving modifiability without physical spool changes
Solution Approach 2:
The patent enables modification of actuator speed characteristics by changing software parameters (lookup tables, gain values) stored in memory rather than physical parameters, allowing operators to tune performance through electronic parameter adjustment
2Ease of operation
If fixed actuator speed characteristics are used, then system simplicity is maintained, but operator customization capability is lost
Solution Approach 1:
The patent enables operators to independently tune actuator speed characteristics through a user interface that allows direct modification of control parameters and lookup tables, making the system self-adjusting to operator preferences without requiring manufacturer intervention
Solution Approach 2:
The patent incorporates feedback mechanisms where operator inputs and actuator responses are monitored and used to adjust control parameters, creating a closed-loop system that adapts to operator needs through iterative tuning
3Adaptability or versatility
If electro-hydraulic actuator system is implemented, then actuator speed control flexibility is improved, but operator tuning capability through HMI is lacking
Solution Approach 1:
The patent introduces a human-machine interface (HMI) as an intermediary between the operator and the electro-hydraulic actuator system, providing tools for operators to view, modify, and tune control parameters and lookup tables without requiring deep technical knowledge of the underlying system
Data Source
AI summary
The present invention relates to a driver self-tuning method using an electro-hydraulic actuator system, the method comprising: a step in which a specific EHA system is selected by a HMI; a step of displaying a graph defining the mapping relationship of an actuator speed command with respect to a joystick command of the selected EHA system; a step in which, when a predetermined button is pressed by a user, the actuator maximum speed is tuned by multiplying the maximum speed value of the actuator of the selected EHA system, which has been pre-stored, by gain that increases or decreases in proportion to the number of times the button was pressed; and a step of storing the tuned actuator maximum speed in the upper controller of the EHA system. Equipment using the electro-hydraulic actuator system makes it possible to directly tune actuator speed characteristics that cannot be achieved with existing equipment using, by way of example, HMI display equipment and operating buttons.