Fluidic Actuator Motion Profiles for Open-Loop Positioning
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Solution Overview
Problem
Existing movement apparatuses for industrial automation, such as those used in handling workpieces, require complex closed-loop control systems for precise positioning, which can be cumbersome and less versatile.
Innovation Solution
A movement apparatus that adapts the pressure and throttle opening of a pressurized fluid according to a predefined value course, allowing for open-loop position control, thereby simplifying the movement adaptation process without the need for closed-loop control, enabling versatile and efficient movement of the actuator element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If closed-loop control systems are used for precise positioning, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining pressure value courses and throttle opening courses that correspond to desired movement profiles. Instead of using complex closed-loop control to adapt movement in real-time, the system pre-calculates and stores pressure and throttle sequences that produce the desired damped movement characteristics. When a positioning task is executed, the appropriate pre-defined course is selected and applied, eliminating the need for complex real-time control algorithms while achieving precise positioning.
2Manufacturing precision
If closed-loop control systems are used for movement adaptation, then movement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent uses copying by creating pre-defined models of desired movement behaviors through pressure value courses and throttle opening courses. These courses are stored as reusable templates that can be selected and applied to different positioning tasks. Instead of operating complex closed-loop control parameters, the user simply selects the appropriate pre-defined course that matches the desired movement characteristics, significantly simplifying operation while maintaining precise movement control.
3Device complexity
If open-loop control with predefined value courses is used, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The patent applies dynamics by making the control system adaptable through selectable pre-defined courses rather than fixed control logic. The system includes multiple pressure value courses and throttle opening courses that can be selected based on the specific positioning requirements. This allows the open-loop system to adapt to different movement needs by switching between pre-configured courses, maintaining versatility without requiring complex real-time control algorithms.
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
This approach allows for a damped and controlled movement of the actuator element to a predefined position, enhancing versatility and simplifying the control process while avoiding the complexity of closed-loop systems.
Implementation Method 1
successively changing a pressure of the pressurised fluid and/or a throttle opening which is used for providing the pressurised fluid, according to a predefined value course
Implementation Method 2
changing a pressure of the pressurised fluid and/or a throttle opening which is used for providing the pressurised fluid
Data Source
AI summary
A movement apparatus for industrial automation, in particular for handling a workpiece, including: a fluidic actuator to which a pressurised fluid can be applied, with a actuator element, and a pressurised fluid provision device which is designed to apply the pressurised fluid to the fluidic actuator according to a control signal, in order to move the actuator element into a predefined position. The pressurised fluid provision device is designed to, whilst the actuator element is in movement to the predefined position, successively change a pressure of the pressurised fluid and/or a throttle opening which is used for providing the pressurised fluid, according to a predefined value course, in order to adapt the movement of the actuator element.