Actuator Seal Curing Profile for Predictable Frequency Response
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Solution Overview
Problem
Current actuators suffer from leakage and unpredictable frequency response characteristics, which are detrimental to safety and performance in safety-critical applications like rotorcraft systems.
Innovation Solution
A method of manufacturing actuators involving a predetermined heating profile, including multiple heating and temperature maintenance phases, using an actuator body and arm with elastomeric and PTFE seals, to ensure consistent and predictable frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional actuators are manufactured without predetermined heating profile, then manufacturing process is simpler and faster, but leakage and unpredictable frequency response characteristics occur
Solution Approach 1:
The patent applies preliminary action by implementing a predetermined heating profile during the curing process that prepares the seal elements and actuator components in advance. The heating profile includes specific temperature ranges and durations that pre-condition the seals and structural elements before the actuator enters service, ensuring consistent frequency response characteristics and reducing leakage from the outset.
Solution Approach 2:
The patent applies parameter changes by controlling temperature parameters during manufacturing. The predetermined heating profile specifies exact temperature ranges (e.g., heating to specific temperatures and maintaining them for defined periods) that optimize the physical and chemical properties of the seal elements and actuator materials, resulting in improved reliability and consistent frequency response.
2Reliability
If actuator seals are cured without controlled heating, then curing process is faster, but leakage increases and frequency response becomes unpredictable
Solution Approach 1:
The patent applies periodic action through a structured heating profile that cycles through specific temperature stages. The curing process involves heating to predetermined temperatures, maintaining those temperatures for specific durations, and following a defined sequence of thermal phases. This periodic thermal treatment ensures optimal seal performance and consistent frequency response while maintaining efficient production rates.
3Productivity
If actuator undergoes rapid heating during curing, then manufacturing cycle time is reduced, but frequency response consistency deteriorates
Solution Approach 1:
The patent applies preliminary action by incorporating optimized heating rates into the predetermined heating profile. The profile specifies controlled heating rates that pre-condition the materials at optimal speeds, balancing manufacturing efficiency with quality consistency. This preliminary thermal preparation ensures that the actuator achieves consistent frequency response characteristics without excessive cycle times.
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 method results in actuators with improved and consistent frequency response characteristics, both immediately after curing and after exposure to vibrations, reducing leakage and enhancing safety and performance.
Implementation Method 1
curing the actuator using a predetermined heating profile
Implementation Method 2
heating the actuator at a heating rate of between 80°C and 200°C per hour
Data Source
AI summary
A method of manufacturing an actuator The method comprises assembling the actuator, and curing the actuator using a predetermined heating profile.