Vehicle Ground Contact Load Estimation Using Acceleration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ground contact load estimation techniques require multiple sensors, such as rolling and pitching rate sensors, leading to increased costs.
Innovation Solution
A ground contact load estimation device that utilizes a universal sensor to acquire physical quantities, calculates a reference inertia load, and applies an inertia load correction value to estimate the ground contact load accurately, reducing the need for specialized sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional techniques use rolling rate sensor and pitching rate sensor to estimate ground contact load, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The invention uses a universal sensor (acceleration sensor) that can measure multiple physical quantities (longitudinal acceleration, lateral acceleration, vertical acceleration) to perform ground contact load estimation, replacing the need for specialized rolling rate sensor and pitching rate sensor. This multi-functional approach reduces sensor quantity while maintaining estimation capability.
Solution Approach 2:
The invention changes the measurement parameters from angular rates (rolling rate, pitching rate) to linear accelerations (longitudinal, lateral, vertical accelerations). By using acceleration parameters instead of angular rate parameters, the system can estimate ground contact load using a universal acceleration sensor, reducing device complexity and cost.
2Measurement precision
If conventional techniques use specialized sensors for ground contact load estimation, then measurement precision is improved, but cost increases
Solution Approach 1:
The invention replaces expensive specialized sensors (rolling rate sensor, pitching rate sensor) with a relatively cheaper universal acceleration sensor. This substitution reduces sensor-related costs while maintaining the capability to estimate ground contact load through computational methods.
Solution Approach 2:
By using a universal acceleration sensor that serves multiple functions (detecting longitudinal, lateral, and vertical accelerations), the system eliminates the need for multiple specialized sensors, thereby reducing overall sensor cost while maintaining measurement precision through software-based estimation algorithms.
Data Source
AI summary
The present invention achieves a technique that not only makes it possible to reduce sensor-related cost but also makes it possible to estimate a ground contact load of a vehicle with sufficiently high accuracy. A ground contact load estimation device (100) causes an acquisition section to acquire a physical quantity related to a vehicle, causes a reference inertia load calculation section (111) to calculate a reference inertia load with use of the physical quantity, uses the physical quantity to cause a correction value calculation section (112) to calculate an inertia load correction value, and causes an inertia load estimation section (110) to estimate an inertia load by adding the inertia load correction value to the reference inertia load.