Passive Seat Vibration Damping With Motion-Driven Resistance Modulation
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Solution Overview
Problem
Existing passive seats are ineffective in reducing harmful low-frequency vibrations transmitted to operators, leading to discomfort and musculoskeletal issues, and active or semi-active solutions increase complexity and cost due to external power requirements.
Innovation Solution
A passive vibration dampening system comprising a frame, cover, transmission unit, and vibration dampening unit that converts translational movement into rotational movement, utilizing frictional, fluidic, or magnetic dampening units to dissipate vibrational energy without an external power source, with resistance force modulation to effectively mitigate vibrations across a wide range of movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive seats are used, then simplicity and cost-effectiveness are maintained, but vibration dampening effectiveness in low frequency range is insufficient
Solution Approach 1:
The patent applies dynamics by making the dampening system adaptive through motion detection. The system transitions from a static passive seat to a dynamic system that detects operator motion and adjusts dampening characteristics in real-time, allowing effective low-frequency vibration reduction while maintaining passive operation without external power sources
Solution Approach 2:
The system changes physical parameters by utilizing the operator's own motion to modulate the dampening characteristics. The motion detection mechanism transforms mechanical motion into parameter adjustments of the dampening element, enabling the system to adapt its vibration reduction properties based on actual operating conditions without requiring external power
2Object-affected harmful factors
If active or semi-active vibration dampening systems are used, then vibration mitigation effectiveness is improved, but system complexity and cost increase due to external power requirements
Solution Approach 1:
The system implements self-service by using the operator's own motion as the energy source for vibration dampening. The motion detection mechanism and adjustable dampening element are activated by the operator's natural movements, eliminating the need for external power sources while maintaining effective vibration mitigation
Solution Approach 2:
The patent introduces an intermediary mechanism that couples the operator's motion to the dampening system. This intermediary translates natural operator movements into control signals that adjust the dampening characteristics, bridging the gap between passive operation and active vibration control without requiring external power
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 effectively dissipates vibrational energy, reducing operator discomfort and musculoskeletal issues while maintaining simplicity and cost-effectiveness by using passive components that do not require external power, applicable to various loads and platforms.
Implementation Method 1
utilizing frictional, fluidic, or magnetic dampening units to dissipate vibrational energy
Implementation Method 2
utilizing frictional, fluidic, or magnetic dampening units to dissipate vibrational energy
Implementation Method 3
utilizing frictional, fluidic, or magnetic dampening units to dissipate vibrational energy
Data Source
AI summary
The invention includes systems having a cover attached to a frame, and a transmission unit with a rotational device connected to or part of the frame. The cover is mechanically connected to the at least one rotational device. A vibration dampening unit mechanically connected to the transmission unit such that translational movement (e.g. vertical movements) of the cover causes rotational movement of the rotational device. The rotational movement is, in turn, transmitted to the vibration dampening unit via the transmission unit. Preferably, the vibration dampening unit is a passive unit and also a resistance force modulated vibration dampening unit. The invention also includes methods for dampening vibrations on a load which includes converting translational movement of a load to rotational movement in a transmission unit, the transmission magnifies the displacement and speed of the rotational movement, and then transmitting the rotational movement to a vibration dampening unit, which dissipated the vibrational energy.