Electric power-assisted steering aligning controller without angle sensor

Abstract

The invention relates to an electric power-assisted steering aligning controller without an angle sensor. The controller comprises a power-assisted control module, a damping control module, a aligning control module and a diagnosis monitoring control module, wherein the aligning control module comprises three sub modules, an aligning state entering judgment module, an aligning process control module and a middle position signal processing module, and the diagnosis monitoring control module comprises a motor rotating speed measurement module, a motor current module and a diagnosis communication module, and the diagnosis communication module inputs the vehicle speed and the rotating angle. The electric power-assisted steering aligning controller has the advantages that the cost can be reduced, and the installation space of the sensor is saved; the automobile dynamic operation stability principle is utilized, and the optimized aligning rotating angle or angular acceleration target curve is obtained according to the input vehicle speed or the rotating angle of a steering wheel, so the closed loop control is carried out through the power-assisted motor rotating speed detection. Because middle position signals are adopted, the steering wheel can be accurately aligned to the middle position.

Description

technical field [0001] The invention relates to an electric power steering device used in automobiles, in particular to an electric power steering returning controller without an angle sensor. Background technique [0002] With the development of vehicle electronic technology, the electric power steering system of vehicles has been widely used due to its advantages of environmental protection, power saving, small footprint, flexible design, and convenient adjustment of control strategies. The centering performance of the vehicle is an important aspect of the vehicle handling stability, and the active centering control of the electric power steering system improves the centering performance of the vehicle. The electric power steering system can be divided into two categories. The other is the electric power steering system with an angle sensor and active back-to-center control. The system contains a steering angle sensing device, which can sense the steering angle of the vehi...

AI Technical Summary

Problems solved by technology

The above method either has the problem of not being accurate enough to reach the middle position, or increases the sensor in a disguised form, which indirectly increases the cost, and does not belong to the true non-angle sensor.

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