Cabin Pressure Control Testing With Variable-Orifice Valves
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Solution Overview
Problem
Existing cabin pressure control systems (CPCS) lack effective testing methods to evaluate their response to simulated changes in external pressure, leading to potential inaccuracies and reliability issues.
Innovation Solution
A testing system with variable-orifice valves and a digital encoder is used to simulate various pressure conditions, allowing precise control of pressure levels and accurate signal transmission, reducing noise and response time, and enabling comprehensive evaluation of CPCS performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional testing systems are used to evaluate CPCS response to simulated pressure changes, then the testing process can be performed, but the accuracy and reliability of the evaluation is insufficient
Solution Approach 1:
The patent applies parameter changes by using variable-orifice valves that can dynamically adjust the size of the orifice opening to precisely control the test pressure level. This allows the testing system to simulate various pressure conditions and accurately evaluate the CPCS response across different operating scenarios, thereby improving both measurement precision and reliability.
Solution Approach 2:
The patent replaces mechanical orifice valves with variable-orifice valves that use electronic control mechanisms to adjust the orifice size. This substitution enables more precise and controllable pressure regulation, reducing noise in the test pressure level and improving the accuracy of CPCS output signal evaluation.
2Manufacturing precision
If fixed-orifice valves are used to control pressure flow, then the system structure is simple, but the precision and continuity of pressure control is limited
Solution Approach 1:
The patent applies dynamics by using variable-orifice valves that can dynamically adjust the orifice size based on control signals. This dynamic adjustment capability allows for precise pressure control across different operating conditions, achieving both high precision and adaptability while managing system complexity through automated control.
Solution Approach 2:
The patent implements preliminary action by pre-configuring the variable-orifice valves with controlled orifice sizes that can be adjusted before testing begins. This allows the system to be prepared with specific pressure control characteristics, enabling precise pressure level control during the actual testing process.
3Stability of the object's composition
If step-wise valve control is used, then the system response is simpler, but the continuity and smoothness of pressure adjustment is reduced
Solution Approach 1:
The patent applies continuity of useful action by using variable-orifice valves that provide continuous adjustment of the orifice size, resulting in continuous and smooth pressure control. This eliminates the step-wise nature of conventional valve control, ensuring continuous fluid flow and smooth pressure transitions, which improves both stability and ease of operation.
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
The system provides precise control of pressure levels, reduces noise, and increases the accuracy of CPCS output signals, enabling thorough testing and improved reliability of CPCS under diverse scenarios.
Implementation Method 1
The pressure controller of the testing system may include one or more variable valves connecting the test enclosure to pressure source(s) and/or vacuum source(s). The testing system may control the pressure controller to define orifices of variable sizes (e.g., variable diameters) for the valves, which may control the flow rate of a fluid into and/or out of the test enclosure
Implementation Method 2
Within the test enclosure, the CPCS may be coupled to a control system of the testing system via a digital encoder of the testing system. The digital encoder may convert output signals from the CPCS into an electrical signal and transmit the electrical signal to the control system
Implementation Method 3
cause the pressure controller to output air from the pressure source into the enclosure through the orifice to pressurize the enclosure to a pressure level
Data Source
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AI summary
A system including: a pressure controller comprising one or more valves, wherein each valve is configured to define a variable orifice, an enclosure containing a Cabin Pressure Control System (CPCS) and processing circuitry. The processing circuitry is configured to: transmit an electrical signal to the pressure controller to cause at least one valve to define an orifice, wherein a diameter of the orifice varies as a function of a voltage of the electrical signal; cause the pressure controller to output air into the enclosure through the orifice, wherein the voltage of the electrical signal controls the pressure level; and receive a signal from the CPCS indicative of one or more outputs by the CPCS in response to pressurization of the enclosure to the pressure level.