A Description of a Method for the Car's Stability Based on its Center of Gravity Linear Changes, Introduction of a Control System Based on the Method to Reduce Car's Deviation During a Turn Path, Through Applying an Individual Dynamic Camber to Each Car Wheel
SAE-PP-00192
10/6/2021
- Content
- In the following article, we introduce a method which describes a car's overturning and deviation condition caused by rotation path from its center of gravity (C. G) point of view. Since the car's overturning and deviation are assumed independent to each other for calculating car's secondary or primary center of gravity, a plane consists of two axes which are perpendicular to each other is defined. The C. G shifting leads to variant contribution of respective wheel's vertical force in turn. The shift depends on motion characteristics such as car's lateral speed, acceleration or braking intensity and steering angle applied to the automobile by driver. Due to the driver's mistakes or their obliviousness, the C. G changes increase excessively which make the car's situation dangerous for passengers. Additionally, because of loss of control, the car may hit other cars or depart from its accurate turn path so a control system is designed to reduce the risk by applying a suitable individual camber angle to each wheel. In fact, we implement this method to increase or decrease the tire's contact patch to balance pressure transmitted by each car wheel. since the car's suspension system has a fundamental roll in its stability, in this article we use dual-differences of the suspension's spring length to define basic relations. At last, a comparison will be taken to determine the control system efficiency in discussion section.
- Citation
- Maleki, M., Ghonjizadeh Samani, A., joudaki, h., and qazanfari nezhad, a., "A Description of a Method for the Car's Stability Based on its Center of Gravity Linear Changes, Introduction of a Control System Based on the Method to Reduce Car's Deviation During a Turn Path, Through Applying an Individual Dynamic Camber to Each Car Wheel," SAE MobilityRxiv™ Preprint, submitted October 6, 2021, https://doi.org/10.47953/SAE-PP-00192.