Adaptive Conveyance Control for Shelf Weight Distribution
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Solution Overview
Problem
In conveyance systems using shelf conveyance type automated guided vehicles, the changing weight characteristics of shelves due to stored articles affect vibration and the risk of articles falling, necessitating adaptive travel control to enhance storage quality and system reliability.
Innovation Solution
A control system that calculates weight distribution characteristics of movable shelves based on storage information and determines traveling conditions, including speed and acceleration, for the conveyance device to optimize conveyance operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the conveyance device travels at high speed with constant acceleration, then productivity is improved, but vibration increases and articles may fall off the shelf
Solution Approach 1:
The patent applies dynamics by making the traveling conditions of the conveyance device adaptable and changeable based on the weight distribution characteristics of the shelf. The control device dynamically adjusts acceleration and speed parameters according to real-time shelf weight distribution data, transitioning from fixed-speed operation to adaptive speed control that optimizes both productivity and safety.
Solution Approach 2:
The patent changes the parameters of the conveyance device's traveling conditions (acceleration, speed) based on the weight distribution characteristics of the shelf. By calculating the center of gravity position and weight distribution from storage management device data, the system adjusts traveling parameters to minimize vibration while maintaining efficient conveyance, directly addressing the contradiction between speed and stability.
2Reliability
If traveling control is adapted to weight characteristics, then storage quality and reliability are improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by having the control device continuously obtain shelf weight distribution information from the storage management device, calculate the center of gravity position, and adjust traveling conditions based on this feedback. This closed-loop control system uses the weight distribution data to automatically determine optimal acceleration and speed parameters, improving reliability without requiring complex manual intervention.
Solution Approach 2:
The control device performs self-service by automatically calculating the weight distribution characteristics and determining appropriate traveling conditions without external intervention. The system uses the storage management device's data to autonomously adjust its operating parameters, reducing the need for additional sensors or complex control infrastructure while improving system reliability.
3Object-affected harmful factors
If the conveyance device adjusts speed and acceleration based on shelf weight distribution, then vibration is reduced, but loss of time occurs due to additional control calculations
Solution Approach 1:
The patent applies preliminary action by having the storage management device maintain up-to-date weight distribution information and center of gravity data before the conveyance operation begins. This pre-calculated information is readily available when the conveyance device needs to adjust its traveling conditions, eliminating the need for real-time calculations during motion and reducing time loss while effectively reducing vibration.
Data Source
AI summary
A control system includes: a storage device that stores storage information including information regarding an article stored in a movable shelf for storing articles and a storage position of the article; and an arithmetic device that controls traveling of a conveyance device that loads and conveys the movable shelf, wherein the arithmetic device calculates a characteristic regarding a weight distribution of the movable shelf on the basis of the storage information, and determines a traveling condition including information on at least one of speed and acceleration of the conveyance device on the basis of the characteristic regarding the weight distribution.