Hybrid Fluid Elastomeric Damper Real-Time Spring Rate Control
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Solution Overview
Problem
Conventional damper systems for aircraft require lengthy and costly preflight preparations and are unable to adjust their spring rate in real-time, leading to reduced efficiency under varying flight conditions.
Innovation Solution
Incorporating a heater to quickly warm the damper components and using electrorheological fluid whose viscosity changes with electrical energy, allowing real-time adjustment of the damper's spring rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional dampers are used with fixed elastomeric materials, then the damper structure is simple and reliable, but the preflight preparation time is lengthy and the spring rate cannot be adjusted in real-time
Solution Approach 1:
The patent applies parameter changes by using electrorheological fluid whose viscosity can be dynamically adjusted through electrical fields. This allows the spring rate of the damper to be changed in real-time without physical modification to the damper structure, thereby reducing preflight preparation time while maintaining manageable system complexity through electronic control.
Solution Approach 2:
The patent replaces traditional mechanical adjustment mechanisms with an electrical field-based system. Instead of physically changing elastomeric materials or mechanical components during preflight preparation, the system uses electrical energy to alter the viscosity of the electrorheological fluid, substituting mechanical adjustment with electrical control to reduce preparation time.
2Adaptability or versatility
If conventional dampers with fixed spring rate are used, then the device complexity is low, but the damper efficiency is reduced when operating outside designed flight conditions
Solution Approach 1:
The patent applies dynamics by making the damper's spring rate adjustable rather than fixed. The electrorheological fluid's viscosity can be dynamically changed in response to varying flight conditions, allowing the damper to adapt its performance characteristics. This dynamic adjustment capability enhances versatility while keeping the physical structure relatively simple.
Solution Approach 2:
The patent changes the physical parameter of fluid viscosity through electrical field application. By controlling the electrical field strength, the system can adjust the spring rate to match different flight conditions, thereby improving adaptability without requiring multiple physical dampers or complex mechanical adjustment mechanisms.
3Productivity
If electrorheological fluid is used to enable real-time spring rate adjustment, then the damper performance is optimized across flight conditions, but the use of energy increases due to heating and electrical field requirements
Solution Approach 1:
The patent applies multi-functionality by using the heater element to serve dual purposes: warming the electrorheological fluid to its operational temperature and providing the electrical field necessary for viscosity control. This eliminates the need for separate heating and electrical field generation systems, thereby optimizing performance while reducing overall energy consumption.
Solution Approach 2:
The patent combines the heating function and electrical field generation function into a single integrated system. The heater element that warms the fluid also generates the electrical field that controls viscosity, merging two energy-consuming functions into one, thereby improving productivity while mitigating the increase in energy use.
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
Significantly reduces preflight preparation time and costs while optimizing damper performance across different flight conditions by enabling real-time spring rate regulation.
Implementation Method 1
a damper associated with a heater for providing heat to the dampening means disposed within the damper
Implementation Method 2
using electrorheological fluid whose viscosity changes with electrical energy, allowing real-time adjustment of the damper's spring rate
Data Source
AI summary
A damper includes a housing that forms a fluidly sealed cavity for receiving a fluid therein. The fluid is configured to change fluid properties as electrical energy is induced. An electrical subsystem provides electrical energy to the fluid, which is monitored with a control subsystem. The method includes inducing the fluid with electrical energy to change the dampening effects of the damper in real time.