Autonomous Feed Displacement Vehicle Stability

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Solution Overview

Problem

Existing unmanned autonomous vehicles for displacing feed on the floor often struggle with stability and control, particularly when encountering excessive amounts of feed, leading to potential sticking and loss of predictability in navigation.

Innovation Solution

The vehicle is designed with a configuration where the distance between the wheel axles and the geometric center of the feed displacing means is less than one-third of the radius, allowing for improved stability and control by compensating oblique pushing forces with the rear wheels, and featuring a swivel front supporting point for enhanced horizontal stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the vehicle uses a conventional wheelbase configuration with wheels positioned farther from the geometric center, then the vehicle structure is simpler and easier to manufacture, but the control stability deteriorates when pushing feed

Engineering Contradiction:
Improvecontrol stabilityVSAvoidwheel positioning complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by optimizing the wheelbase dimensions - specifically positioning the rear wheels at a distance of less than one-third of the feed displacing means radius from the geometric center. This quantitative parameter adjustment resolves the contradiction by achieving improved control stability through precise dimensional specification without adding structural complexity

Inventive Principle:
Principle #35Parameter changes

2Reliability

If the vehicle encounters excessive amounts of feed, then the feed displacement function is compromised, but the vehicle structure remains unchanged

Engineering Contradiction:
Improveoperation predictabilityVSAvoidfeed accumulation effect
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by pre-positioning the rear wheels closer to the geometric center of the feed displacing means. This proactive configuration creates a shorter force arm that counteracts the oblique pushing forces from excessive feed before they can cause the vehicle to stick or lose control, thereby maintaining operation predictability under variable feed conditions

Inventive Principle:
Principle #9Preliminary anti-action

Data Source

PatentEP2568802B1Vehicle for displacing feed
Publication Date: 2014.04.23 LELY PATENT NV
  • EP2568802B1 patent drawingFigure 1
  • EP2568802B1 patent drawingFigure 2

AI summary

The invention provides an autonomous vehicle (1 ) for displacing feed laterally, comprising a frame having two separately drivable rear wheels (4',5') and a front supporting point (15), and a feed displacing means in the form of an annular element (12) which is freely rotatable and has a radius r, said element forming the outer circumference of the vehicle (1 ). In order to enhance the control stability, the rear wheels are situated at a distance of less than a radius (r) from the geometric centre of the vehicle.