Alcázar Vargas Manuel, Pérez Fernández Javier, Velasco García Juan M, Cabrera Carrillo Juan A, Castillo Aguilar Juan J
Department of Mechanical Engineering, University of Málaga, 29071 Málaga, Spain.
Sensors (Basel). 2021 Jan 15;21(2):577. doi: 10.3390/s21020577.
The performance of vehicle safety systems depends very much on the accuracy of the signals coming from vehicle sensors. Among them, the wheel speed is of vital importance. This paper describes a new method to obtain the wheel speed by using Sin-Cos encoders. The methodology is based on the use of the Savitzky-Golay filters to optimally determine the coefficients of the polynomials that best fit the measured signals and their time derivatives. The whole process requires a low computational cost, which makes it suitable for real-time applications. This way it is possible to provide the safety system with an accurate measurement of both the angular speed and acceleration of the wheels. The proposed method has been compared to other conventional approaches. The results obtained in simulations and real tests show the superior performance of the proposed method, particularly for medium and low wheel angular speeds.
车辆安全系统的性能在很大程度上取决于来自车辆传感器的信号的准确性。其中，轮速至关重要。本文介绍了一种使用正弦 - 余弦编码器获取轮速的新方法。该方法基于使用Savitzky - Golay滤波器来最优地确定最适合测量信号及其时间导数的多项式系数。整个过程所需的计算成本较低，这使其适用于实时应用。通过这种方式，可以为安全系统提供车轮角速度和加速度的精确测量。所提出的方法已与其他传统方法进行了比较。在模拟和实际测试中获得的结果表明了所提出方法的优越性能，特别是对于中低车轮角速度。
