Tongji University

Rasilient Systems, Inc.

Bo Leng

Yee-Hsiang Sean Chang

Da Jin

Yiqiang Ding

Lu Xiong

Zhuoping Yu

Xing Yang

A method for adaptive estimation of a road surface adhesion coefficient for a vehicle with complex excitation conditions taken into consideration comprises the following steps: 1) designing an estimator according to a single-wheel dynamics model of a vehicle, and estimating a longitudinal tire force and a road surface peak adhesion coefficient under longitudinal excitation; 2) designing an estimator according to a two-degree-of-freedom kinematic model of the vehicle, and estimating a tire aligning moment and a road surface peak adhesion coefficient under excitation of a lateral force; and 3) determining an excitation condition met by the vehicle according to a vehicle state parameter, performing fuzzy inference to obtain limits achievable by current longitudinal and lateral tire forces, and designing a fusion observer to fuse estimation results. The method achieves favorable robustness, improves real-time capability, and can be performed quickly and accurately.

Method of adaptive estimation of adhesion coefficient of vehicle road surface considering complex excitation conditions

A method for storing data, comprises the steps of: defining one or more intervals for one or more virtual disks, wherein each of the intervals has data; receiving a storage command in a cache, wherein the command having a logical address and a data block; determining a respective interval for the data block corresponding to the logical address of the data block; determining whether the data of the respective interval is to be written to a corresponding storage unit; and receiving a next storage command.

Methods and systems for storing data blocks of multi-streams and multi-user applications

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Shanghai, China

Bo Leng