Dual Loop Control for Printer Carriage Vibration Suppression
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Solution Overview
Problem
Conventional feedback control methods for serial type printers face a trade-off between traceability and vibration suppression, where reducing vibration can compromise responsiveness and vice versa.
Innovation Solution
An electric apparatus and control method that utilize dual feedback control loops with a first loop for stabilizing carriage movement and a second loop for high-speed vibration suppression, using detection signals to estimate control and state quantities, and comparing these to determine the appropriate operation quantity for controlling the carriage movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the control gain is decreased to suppress excessive vibration, then vibration suppression is improved, but the responsiveness of the control target object deteriorates
Solution Approach 1:
The patent divides the feedback control into two distinct loops: a first feedback control loop for traceability with a first control gain, and a second feedback control loop for vibration suppression with a second control gain. This segmentation allows each loop to be optimized independently, resolving the contradiction between responsiveness (first loop) and vibration suppression (second loop).
Solution Approach 2:
The patent dynamically adjusts control parameters by implementing dual feedback loops with different control gains suited for different control objectives. The system can adaptively apply appropriate control strategies based on the specific control need, maintaining both responsiveness and vibration suppression capability.
2Stability of the object's composition
If the control gain is decreased to converge velocity vibration, then vibration suppression is improved, but traceability of the control target object deteriorates
Solution Approach 1:
The patent segments feedback control into two independent loops with distinct control gains: the first loop maintains traceability with higher gain, while the second loop achieves vibration convergence with lower gain. This segmentation resolves the contradiction by allowing each loop to optimize for its specific objective without compromising the other.
Solution Approach 2:
The system dynamically implements dual feedback loops that can independently adjust control parameters. The first loop preserves traceability through appropriate gain settings, while the second loop achieves vibration convergence, allowing the system to maintain both precision and stability simultaneously.
3Device complexity
If a single feedback control loop is used, then device complexity is reduced, but compatibility between traceability and vibration suppression cannot be achieved
Solution Approach 1:
The patent segments the control system into two feedback loops with different control gains optimized for different objectives. This segmentation enables the system to achieve both traceability and vibration suppression compatibility, demonstrating that increased structural complexity can resolve fundamental performance contradictions.
Solution Approach 2:
The patent implements a dynamic dual-loop control architecture that adapts to different control requirements. By using two feedback loops with independently tuned gains, the system achieves versatility in handling both traceability and vibration suppression, showing that dynamic complexity enhances adaptability.
Data Source
AI summary
An apparatus detects movement of a target object, estimates a control quantity for first feedback control for the target object at a first period, based on a detection signal, and estimates a first state quantity of the target object and a second state quantity obtained by time differentiation of the first state quantity in order to perform second feedback control for the target object at a second period shorter than the first period, based on the detection signal. The apparatus generates a first operation quantity for the first feedback control, based on the estimated control quantity, generates a second operation quantity for the second feedback control, based on the estimated first and second state quantities, and determines an output value, based on a result of comparing the second operation quantity with a maximum value of the first operation quantity.