Multi-Mode Resonance Feedback Control for Vibration Suppression
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Solution Overview
Problem
Existing resonance suppression control devices require complex configurations and may fail to adequately suppress vibrations when the transfer function of a device changes, leading to insufficient vibration control.
Innovation Solution
A resonance suppression control device with multiple feedback loops, each comprising a band-pass filter, phase compensator, and amplitude adjuster, which function as differentiators, allowing for simple mounting and effective vibration suppression across various vibration modes, with adjustable parameters to adapt to changing resonance frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex feedback loop with filter and differentiator is used, then vibration suppression performance is improved, but device complexity increases and mounting becomes difficult
Solution Approach 1:
The patent combines the filter and differentiator functions into an integrated control structure where the feedback loop directly processes vibration signals through combined filtering and differentiation operations. This merging reduces the number of separate components needed while maintaining the vibration suppression performance that would otherwise require complex separate filter and differentiator stages.
2Ease of manufacture
If a fixed transfer function is used in the feedback loop, then the control device is simple to mount, but vibration suppression becomes insufficient when resonance frequency changes
Solution Approach 1:
The patent implements dynamic adjustment of the feedback loop parameters based on detected resonance frequencies. The control device continuously monitors the resonance frequency of the control target and adjusts the feedback gain and filter characteristics accordingly. This dynamic adaptation allows the system to maintain effective vibration suppression across varying operating conditions without requiring complex manual reconfiguration.
Solution Approach 2:
The patent employs a feedback mechanism where the output of the vibration suppression control is monitored and used to adjust the control parameters in real-time. The feedback loop detects changes in resonance frequency and automatically adjusts the filter cutoff frequencies and differentiator parameters to maintain optimal vibration suppression performance, enabling the system to adapt to changing conditions while keeping the mounting process relatively simple.
3Reliability
If multiple separate control devices are used for each vibration mode, then vibration suppression in each mode is improved, but device complexity and mounting difficulty increase
Solution Approach 1:
The patent designs a universal feedback control device that can handle multiple vibration modes simultaneously through a single integrated system. The control device uses a multi-mode filter that can extract and process signals from different vibration modes, and a differentiator that operates on the combined signal to suppress vibrations across all modes. This multi-functional approach eliminates the need for separate control devices for each vibration mode while maintaining effective suppression performance.
Solution Approach 2:
The patent segments the vibration suppression function into distinct processing stages within a unified control architecture. The feedback loop is divided into signal extraction (filtering), vibration mode identification, differentiation, and suppression control stages. This segmentation allows each stage to handle multiple vibration modes independently while working together in a coordinated manner, achieving comprehensive vibration suppression without requiring multiple separate control devices.
Data Source
AI summary
In a resonance suppression control device that controls suppression of vibrations in a resonance frequency in each vibration mode of a control target having a plurality of vibration modes, a configuration that is simple, and can suppress vibrations in a resonance frequency in the plurality of vibration modes is provided. A control device is a resonance suppression control device that controls suppression of vibrations in a resonance frequency in each vibration mode of a control target having a plurality of vibration modes. The control device includes a plurality of feedback loops that provide negative feedback of output of the control target corresponding to the plurality of vibration modes to an input side. The plurality of feedback loops respectively include band-pass filters that extract one or more vibration modes from the plurality of vibration modes, phase compensators, and amplitude adjusters. The band-pass filters and the phase compensators function as differentiators.