Driverless Vehicle Movement Control Under Changing Assembly Loads

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Solution Overview

Problem

During the manufacturing process, vehicles experience deviations in movement control due to external forces and weight changes from attached parts, which are common issues in mobile objects, affecting driverless driving systems.

Innovation Solution

A control device that generates and outputs control commands using vehicle state information, including impact force, trailer weight, and positional data to stabilize movement, speed, and direction, utilizing sensors and databases to adjust commands dynamically.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If driverless driving control is implemented during vehicle manufacturing, then automation and productivity are improved, but movement deviation occurs due to external forces and weight changes from attached parts

Engineering Contradiction:
Improvedriverless driving controlVSAvoidmovement control deviation
Core Design Contradiction:
Extent of automationVSManufacturing precision

Solution Approach 1:

The control device continuously acquires vehicle state information including weight, impact force, and position data during manufacturing processes. This feedback mechanism allows the system to detect deviations caused by part attachment and dynamically adjust control commands to maintain accurate movement control throughout the assembly process.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The control system transitions from static pre-manufacture control parameters to dynamic in-process adjustment. By incorporating real-time vehicle state information such as changing weight and impact forces during part attachment, the system adapts control commands continuously to maintain precision despite varying operational conditions.

Inventive Principle:
Principle #15Dynamics

2Stability of the object's composition

If control commands are adjusted dynamically based on vehicle state information, then movement stability is improved, but device complexity increases due to additional sensors and processing requirements

Engineering Contradiction:
Improvemovement stabilityVSAvoidcontrol system complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The control device integrates multiple functions into a single system: it manages driverless driving control, monitors vehicle state parameters (weight, impact force, position), processes sensor data, and generates adjusted control commands. This multi-functional integration reduces the need for separate dedicated systems for each function, thereby limiting the increase in overall device complexity while maintaining movement stability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP4524677A1Control device and control method for a self-propelled vehicle in a manufacturing process
Publication Date: 2025.03.19 TOYOTA JIDOSHA KK
  • EP4524677A1 patent drawingFigure 1
  • EP4524677A1 patent drawingFigure 2
  • EP4524677A1 patent drawingFigure 3

AI summary

A control device is configured to control movement of a mobile object that can travel by driverless driving and that is transported in a process of manufacturing the mobile object. The control device includes a control command section configured to generate and output a control command to cause the mobile object to move. The control command section is configured to generate the control command by using vehicle state information that is information related to at least one of: - magnitude of impact force applied to the mobile object; - a direction in which the impact force acts; - weight of the mobile object; - weight of a trailer (400) configured to carry a part (PT) and configured to be removably coupled to the mobile object and move, the part (PT) being configured to be attached to the mobile object; and - a process in which the mobile object is positioned.