Vibration Control Device Using Inverse System Feedback
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Solution Overview
Problem
Vibration occurs in control targets due to resonance, especially in lightweight systems, which is challenging to address with existing methods that require complex controllers and stabilizing compensators.
Innovation Solution
A vibration control device that uses positive feedback to reduce vibrations by modeling the system, calculating an inverse system output, and providing feedback to cancel reflected waves, thereby controlling the actuator to minimize resonance effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If weight of control target is reduced to lower conveyance cost or save energy, then weight decreases, but vibration caused by resonance occurs more easily
Solution Approach 1:
The patent implements a feedback mechanism where the position of the control target is detected, processed through an inverse system model, and fed back positively to the actuator controller. This feedback loop enables real-time compensation for resonance vibrations by calculating the inverse system output that counteracts the harmful vibrations while maintaining the lightweight design.
Solution Approach 2:
The patent changes the control parameter by using positive feedback instead of conventional negative feedback, and by incorporating an inverse system model that transforms the position information into vibration-compensating control signals. This parameter transformation allows the system to eliminate resonance effects without adding physical mass.
2Object-affected harmful factors
If conventional methods are used to reduce vibration effects, then vibration is reduced, but controller becomes complicated with stabilizing compensators
Solution Approach 1:
The patent replaces complex mechanical vibration damping mechanisms with a computational approach using an inverse system model. Instead of using physical stabilizing compensators or complex mechanical structures, the system uses mathematical modeling and positive feedback control to achieve vibration reduction, thereby simplifying the overall controller architecture.
3Object-affected harmful factors
If positive feedback is performed considering delay time, then vibration is reduced, but control system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating the inverse system model that accounts for delay time characteristics. The model is designed in advance to compensate for the expected delay, allowing the positive feedback to effectively reduce vibration without requiring complex real-time adjustments. This preliminary modeling simplifies the control system compared to adaptive approaches.
Data Source
AI summary
A vibration control device moves an object by controlling an actuator. The vibration control device controls a position and speed of the actuator, generates a model by modeling the object; and calculates an inverse system output based on the model and the control to provide positive feedback of a position of the object based on the inverse system output.