No-Back Brake Modulation Spring for Chatter Damping
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Solution Overview
Problem
No-back brakes in actuator systems are susceptible to chatter during high energy aiding loading operations, leading to early wear-out and increased maintenance costs due to excessive oscillations and jerking movements.
Innovation Solution
Incorporating a modulating spring within the no-back brake that compresses progressively to apply a selective compressive force against the brake section, mitigating chatter by damping oscillations and optimizing performance under varying load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a no-back brake is used to provide protection from backdriving during high energy aiding loading operations, then the actuator system gains protection and reliability, but the brake becomes susceptible to chatter and excessive oscillations
Solution Approach 1:
A modulating spring is introduced as an intermediary element between the brake components. The spring progressively compresses during brake engagement, providing a modulating compressive force that stabilizes the brake contact and eliminates chatter while maintaining the no-back brake's protective function
Solution Approach 2:
The spring changes the physical parameters of the brake system by introducing a progressive compressive force that varies with compression distance. This dynamic parameter change provides optimal damping throughout the brake engagement process, reducing oscillations while maintaining reliability
2Power
If the no-back brake operates under high energy aiding loading operations, then the actuator achieves high power output, but the brake experiences early wear-out and degraded performance
Solution Approach 1:
The modulating spring provides beforehand cushioning by progressively compressing during brake engagement. This cushioning effect reduces impact loads and shock forces on the brake components, preventing early wear-out and extending service life while maintaining high power capability
Solution Approach 2:
The spring converts the harmful high-energy impact forces into beneficial progressive compression. By absorbing and modulating the energy through controlled spring compression, the system protects the brake from damaging shock loads while utilizing the full energy capacity for useful work
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 modulating spring effectively reduces chatter and oscillations in no-back brakes, enhancing their performance and extending their lifespan by providing optimal damping during high energy aiding load operations.
Implementation Method 1
the modulating spring is configured to apply a selective compressive force at the brake corresponding to a distance the brake is displaced
Implementation Method 2
a modulating spring, coupled to the shaft and coupled to the brake, configured to compress in response to the brake being displaced
Data Source
AI summary
Methods and systems according to one or more examples are provided for reducing chatter in a no-back brake during aiding load operations. In one example, an apparatus comprises a no-back brake, disposed within an actuator coupled to an aircraft, including a shaft, and a ball ramp plate, coupled to the shaft, to receive a force comprising an air loading force and is displaced responsive to the force. The apparatus further comprises a brake, coupled to the shaft and coupled to the ball ramp plate, and displaced by the ball ramp plate corresponding to a distance the ball ramp plate is displaced. The apparatus further comprises a modulating spring, coupled to the shaft and coupled to the brake, configured to compress in response to the brake being displaced, and the modulating spring is configured to apply a selective compressive force at the brake corresponding to a distance the brake is displaced.