Vibration Isolator Resonance Tuning via Elastic Member Rigidity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vibration isolators require frequent selection and arrangement of elastic members to achieve desired vibration suppression, leading to increased weight and complexity, and unavoidable resonance issues.
Innovation Solution
An adjusting method and system that utilizes multiple elastic member groups arranged on an xy plane, with specific rigidity adjustments and positions to shift resonance frequencies, allowing for independent control of translational and rotational motions without increasing the number or weight of isolators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number and weight of vibration isolators are increased to achieve desired vibration suppression, then vibration insulation performance is improved, but device complexity and weight increase
Solution Approach 1:
The patent applies parameter changes by adjusting the rigidity values (k11, k22, k33, k44, k55, k66) of existing elastic members to shift resonance frequencies. Instead of adding more elastic members, the invention modifies the physical parameters (rigidity) of the current members to achieve desired vibration suppression characteristics, thereby avoiding increased device complexity and weight while maintaining improved vibration insulation performance
Solution Approach 2:
The patent employs preliminary action by pre-calculating and pre-adjusting the rigidity parameters of elastic members during the design phase to achieve optimal resonance frequency positioning before actual operation. This allows the vibration isolator to be configured with minimal components from the outset, avoiding the need for frequent trial-and-error modifications and reducing both device complexity and weight while ensuring effective vibration insulation
2Reliability
If conventional trial-and-error methods are used to adjust elastic member arrangement, then desired vibration suppression can be achieved, but time consumption and manufacturing complexity increase
Solution Approach 1:
The patent replaces the mechanical trial-and-error adjustment process with a computational design system. By using mathematical models and calculations to determine optimal rigidity parameters (k11, k22, k33, k44, k55, k66) and elastic member arrangements, the invention eliminates the need for repeated physical prototyping and testing, significantly reducing time consumption while ensuring effective vibration suppression
Solution Approach 2:
The invention performs preliminary computational analysis to determine the optimal configuration of elastic members and their rigidity parameters before manufacturing. This pre-calculation approach allows designers to establish the correct arrangement and rigidity values in advance, avoiding time-consuming trial-and-error adjustments during assembly and testing phases
3Device complexity
If resonance frequency is not adjusted, then the vibration isolator structure remains simple, but resonance occurs at fixed levels reducing effectiveness
Solution Approach 1:
The patent applies parameter changes by adjusting the rigidity values (k11, k22, k33, k44, k55, k66) of elastic members to shift resonance frequencies away from harmful operating ranges. This simple parameter adjustment approach effectively reduces resonance influence without adding complex adjusting mechanisms, maintaining device simplicity while eliminating the harmful resonance effect
Solution Approach 2:
The invention discards the fixed rigidity design approach and recovers performance by implementing adjustable rigidity parameters. By making the rigidity values (k11, k22, k33, k44, k55, k66)可调, the system can adapt to different operating conditions and eliminate resonance issues without requiring complex additional mechanisms
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
Enables effective suppression of resonance in vibration isolators with reduced complexity and weight, allowing for easier design and manufacturing by independently adjusting resonance frequencies without frequent changes to the arrangement of elastic members.
Implementation Method 1
a vibration isolator that increases attenuation in resonance to reduce the influence of the resonance of the isolator
Implementation Method 2
a vibration isolator that increases attenuation in resonance to reduce the influence of the resonance of the isolator
Data Source
AI summary
Provided is an adjusting method for a resonance frequency of a vibration isolator, the vibration isolator including first to n-th elastic member groups and/or an n+1-th elastic member group, the first to n-th elastic member groups and/or the n+1-th elastic member group being located on an xy plane of an xyz coordinate system, and an xy coordinate system of the xyz coordinate system being a coordinate system obtained by, when a tensor of inertia I with respect to an XYZ coordinate system having an origin in a center of gravity of a vibration sensing side structure or a vibration source side structure is represented as I, rotating an XY coordinate system by θ=tan−1(2IXY/(IXX−IYY)) around a Z axis, the adjusting method including, when rigidity Ki of the first to n-th elastic member groups is represented as[Ki]=[ki_xx000ki_yy000ki_zz],rigidity Kn+1 of the n+1-th elastic member group is represented as[Kn+1]=[kn+1_xx000kn+1_yy000kn+1_zz],and an x coordinate and a y coordinate of the first to n-th elastic member groups are represented as rpi_x and rpi_y, while satisfying Σki_xxrpi_x=Σki_yyrpi_y=0 and Σki_yyrpi_xrpi_y=Σki_xxrpi_xrpi_y=0, at least one step of a step of adjusting positions of the first to n-th elastic member groups such that values of Σ(ki_zzrpi_y2), Σ(ki_yyrpi_x2), and Σ(ki_zzrpi_y2+ki_yyrpi_x2) change and respectively shifting resonance frequencies of x, y, and z-axial rotational motions and a step of arranging the n+1-th elastic member group at an origin of the xyz coordinate, adjusting values of kn+1_xx, kn+1_yy, and kn+1_zz, and respectively shifting resonance frequencies of x, y, and z-direction translational motions.