Indirect Tire Pressure Monitoring System (i-TPMS) monitors inflation pressures in pneumatic tires using wheel speed sensor signals acquired from Anti-lock Braking System (ABS). In order to monitor the tire pressures indirectly, frequency analysis and wheel radius analysis are operating in parallel. This manuscript focuses on the wheel radius analysis. Changes in vehicle weight can influence the difference in rolling radius of the front and rear tires. In this manuscript, a tire rolling radius compensation algorithm using a longitudinal acceleration (Ax) sensor is proposed, without any additional cost. The Ax sensor offset caused by loaded mass is estimated when the vehicle is standstill as well as in motion. The tire rolling radius can be compensated using the estimated offset of the Ax sensor. The compensation amount of the tire rolling radius can be obtained based on the difference between the estimated value from the TPMS learning phase and the value from the TPMS detecting phase. Vehicle tests have been conducted in order to evaluate the proposed estimation algorithm. It has been shown from the test results that the proposed method provides satisfactory performance for compensating the tire rolling radius for the changes in vehicle weight.

间接轮胎压力监测系统 (i-TPMS) 使用从防抱死制动系统 (ABS) 获取的车轮速度传感器信号监测充气轮胎的充气压力。为了间接监测轮胎压力，频率分析和车轮半径分析并行运行。本手稿侧重于车轮半径分析。车辆重量的变化会影响前后轮胎滚动半径的差异。在这份手稿中，提出了一种使用纵向加速度 (Ax) 传感器的轮胎滚动半径补偿算法，无需任何额外成本。在车辆静止和运动时估计由负载质量引起的 Ax 传感器偏移。可以使用 Ax 传感器的估计偏移来补偿轮胎滚动半径。轮胎滚动半径的补偿量可以根据TPMS学习阶段的估计值与TPMS检测阶段的估计值之间的差异获得。已经进行了车辆测试以评估所提出的估计算法。测试结果表明，所提出的方法在补偿车辆重量变化的轮胎滚动半径方面具有令人满意的性能。