A Tire Vertical Force Estimation System and Estimation Method

Abstract

The invention discloses a tire vertical force estimation system and an estimation method thereof, comprising an acceleration sensor, a wheel speed sensor, a tire pressure sensor, a tire ground contact angle estimation module and a tire vertical force estimation module, and the tire ground contact angle estimation module passes The signals collected by the acceleration sensor and the wheel speed sensor estimate the tire contact angle value, and the tire vertical force estimation module obtains the real-time tire vertical force value through the tire contact angle value estimated by the tire contact angle estimation module and the tire pressure sensor. Beneficial effects: the invention has high precision in estimating the tire ground contact angle and fast calculation speed; by establishing a tire model to estimate the vertical force, the application range of vertical force estimation is broadened, and the estimation result can more accurately reflect the vertical force of the tire as it touches the ground. The change of the angle has high real-time performance, fast calculation speed, and few identification parameters, and can be applied to vehicle dynamics control to improve the steering stability of the vehicle.

Description

technical field [0001] The invention relates to an estimating system and an estimating method for the vertical load of an automobile tire, in particular to a tire vertical force estimating system and an estimating method, belonging to the technical field of vehicle tire research. Background technique [0002] The tire is the only part of the car in contact with the road, which transmits the force and torque required for the movement of the vehicle. The force and torque generated by the interaction between the tire and the road play an important role in the normal driving of the vehicle. It reflects the ride comfort, stability and braking of the car. In previous studies, the estimation of tire force was mostly based on the vehicle dynamics model. Since the development of sensing technology, the estimation of tire force by installing sensors on the tire has received more and more attention. [0003] Methods such as neural network model and fuzzy logic control system need to m...

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Problems solved by technology

[0003] Methods such as neural network models and fuzzy logic control systems need to model each tire, and can only predict the vertical force of a specific tire. Due to different tire structures, the prediction accuracy is also different, and they are not universal. The first method is to indirectly estimate the vertical force of the tire, which cannot be installed on the vehicle; to estimate the vertical force by polynomial fitting, due to the strong nonlinearity of the tire, it is difficult to fit the tire characteristics, resulting in certain errors

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