Three-Position Transfer Valve Control for Asymmetric Nozzle Loading
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Solution Overview
Problem
Traditional effector systems with gravity biases and/or distortions, such as engine nozzle actuators, face controllability issues due to asymmetric loading caused by nozzle tilt, which existing actuator systems cannot effectively account for.
Innovation Solution
A system comprising a first and second controllable valve, a transfer valve, and a transfer control system, where the transfer valve can move between three positions to fluidly communicate pressure control lines between functional systems, and the transfer control system controls the valve's position using pressure differentials and a controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional effector systems with gravity biases are used, then the system structure is simple, but the controllability deteriorates due to asymmetric loading from nozzle tilt
Solution Approach 1:
The system divides the effector control into multiple independent controllable valves (first controllable valve, second controllable valve, and transfer valve) that can be independently controlled. This segmentation allows asymmetric loading to be managed by adjusting individual valve positions rather than requiring complete system redesign, thus improving controllability while maintaining reasonable structural complexity.
Solution Approach 2:
The transfer valve is designed to move between three distinct positions (first, second, and third positions) to dynamically adapt to different operational modes and asymmetric loading conditions. This dynamic reconfiguration capability enables the system to maintain controllability under varying gravitational and asymmetric loading conditions without requiring a completely complex static structure.
2Ease of manufacture
If conventional actuator systems are used, then the system is simple to implement, but the ability to account for asymmetric loading deteriorates
Solution Approach 1:
The transfer valve acts as an intermediary component that enables asymmetric loading management by redirecting fluid flow between the first and second controllable valves. This intermediary mechanism allows the system to adapt to asymmetric conditions without requiring complete redesign of the actuator system, maintaining ease of manufacture while improving adaptability.
Solution Approach 2:
The transfer valve serves multiple functions: it can position the system in a first position for normal operation, a second position for asymmetric loading compensation, and a third position for alternative operational modes. This multi-functionality allows a single component to handle various loading conditions, improving adaptability without proportionally increasing implementation complexity.
3Adaptability or versatility
If a transfer valve with three positions is implemented, then the adaptability to different operational modes improves, but the device complexity increases
Solution Approach 1:
The transfer valve incorporates biasing members that automatically bias the valve toward specific positions based on system conditions. This self-service mechanism reduces the need for complex external control systems to manage the three positions, thereby improving operational mode adaptability while limiting the increase in overall device complexity.
Solution Approach 2:
The system uses force-balanced design where transfer control pressure and biasing members create natural equilibrium positions for the transfer valve. This feedback mechanism ensures the valve stabilizes at appropriate positions (first, second, or third) based on pressure differentials and mechanical biasing, enabling multi-mode operation without requiring overly complex control electronics or positioning mechanisms.
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 solution enhances the controllability of effector systems by allowing for adaptive management of asymmetric loading, improving the system's ability to maintain precise control across different operational modes.
Implementation Method 1
The at least one transfer control valve can output a transfer control pressure on one or more third pressure control lines... to control a position of the transfer valve via the transfer control pressure on the one or more third pressure control lines
Implementation Method 2
The transfer valve can include one or more biasing members configured to bias the transfer valve. In at least one of the first position, second position, or third position, the transfer valve can be force-balanced by the one or more biasing members and the transfer control pressure
Data Source
AI summary
A system can include a first controllable valve, a second controllable valve, a transfer valve, and a transfer control system. The first controllable valve can be configured to output a control pressure on one or more first pressure control lines. The second controllable valve can be configured to output a control pressure on one or more second pressure control lines. The transfer valve can be in fluid communication with the first controllable valve and the second controllable valve. The transfer valve can be configured to move between a first position, a second position, and a third position.