Cardboard Panel Support Structure for High-Speed Collision Targets
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Solution Overview
Problem
Existing collision objects for testing Advanced Crash Avoidance Technologies are heavy, leading to hesitation in collision and increased risk of damage to subject vehicles, and they lack stability and resemblance to real objects at high speeds, resulting in poor simulation of traffic environments.
Innovation Solution
A support structure comprising lightweight, self-supporting panels made from corrugated cardboard with specific bending stiffness and strength, designed to maintain shape and resemble real objects, allowing for high-speed collisions without damaging subject vehicles and facilitating efficient testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the collision object is made heavy, then it can withstand collisions, but the subject vehicle driver hesitates to collide and the risk of damage to the subject vehicle increases
Solution Approach 1:
The collision object is divided into multiple separate panels (front panel, rear panel, side panels) that can independently deform and absorb impact energy. This segmentation allows the structure to withstand collisions through distributed deformation rather than relying on overall heavy mass, thereby reducing damage risk to the subject vehicle while maintaining collision resistance.
Solution Approach 2:
The panels are designed with specific bending stiffness parameters (20-60 Nm according to ISO 5628:2012) that optimize their ability to deform controllably during impact. By carefully controlling the stiffness parameter, the panels can absorb impact energy through controlled deformation without transferring excessive force to the subject vehicle, resolving the contradiction between collision resistance and damage risk.
2Weight of moving object
If the collision object uses lightweight materials, then the weight is reduced, but the shape stability deteriorates and the object flutters at high speeds
Solution Approach 1:
The lightweight structure is divided into multiple rigid panels connected by hinges, where each panel maintains its own shape stability independently. The segmented design prevents the entire structure from fluttering at high speeds while keeping individual panels lightweight, thus resolving the contradiction between low weight and shape stability.
Solution Approach 2:
The panels are made from composite materials (such as corrugated cardboard or foam panels) that provide high stiffness-to-weight ratio. These composite materials maintain shape stability and resist fluttering at high speeds while keeping the overall weight low, directly addressing the contradiction between lightweight construction and shape stability.
3Shape
If the panels have high bending stiffness, then the shape is maintained, but the ability to deform and absorb impact energy is reduced
Solution Approach 1:
The structure segments the shape maintenance function (provided by rigid panels with specific stiffness) from the energy absorption function (provided by hinge mechanisms allowing panel deformation). Each panel maintains its shape through controlled stiffness, while the connections between panels enable overall structure deformation for energy absorption, resolving the contradiction between shape maintenance and impact energy absorption.
Solution Approach 2:
The panels are designed with dynamic characteristics that allow them to behave rigidly during normal operation (maintaining shape) but deform controllably during impact (absorbing energy). The bending stiffness is optimized to provide rigidity at operational speeds while allowing deformation under impact loads, resolving the contradiction between shape maintenance and energy absorption capability.
4Reliability
If the collision object resembles a real object, then the simulation accuracy is improved, but the complexity of the structure increases
Solution Approach 1:
The collision object creates a simplified copy of the real object's essential features using flat panels and geometric shapes, rather than replicating the full complexity of the real object. This copying approach maintains sufficient resemblance for accurate simulation of collision dynamics and sensor detection while keeping the structure simple and manageable, resolving the contradiction between simulation accuracy and structural complexity.
Data Source
AI summary
Support structure adapted to form a collision object for use when testing a subject vehicle to simulate a real traffic environment, the support structure comprising a plurality of panels having a bending stiffness according to ISO 5628:2012 of 20 Nm to 60 Nm, such as 30 Nm to 50 Nm, such as 35 Nm to 45 Nm. A support structure adapted to form a collision object for use when testing a subject vehicle to simulate a real traffic environment, the support structure comprising a plurality of panels made from cardboard, is also provided. A collision object for use when testing a subject vehicle to simulate a real traffic environment is also provided.