This paper introduces a novel adaptive control method for suspension vehicle systems in response to road disturbances. The considered model is based on an active symmetry quarter car (SQC) fractional order suspension system (FOSS). The word symmetry in SQC refers to the symmetry of the suspension system in the front tires or the rear tires of the car. The active suspension controller is generally driven by an external force like a hydraulic or pneumatic actuator. The external force of the actuator is determined using fractional dynamic sliding mode control (FDSMC) to counteract road disturbances and eliminate the chattering caused by sliding mode control (SMC). In FDSMC, a fractional integral acts as a low-pass filter before the system actuator to remove high-frequency chattering, necessitating an additional state for FDSMC implementation assuming all FOSS state variables are available but the parameters are unknown and uncertain. Hence, an adaptive procedure is proposed to estimate these parameters. To enhance closed-loop system performance, an adaptive proportional-integral (PI) procedure is also employed, resulting in the FDSMC-PI approach. A comparison is made between two SQC suspension system models, the fractional order suspension system (FOSS) and the integer order suspension system (IOSS). The IOSS controller is based on dynamic sliding mode control (DSMC) and a PI procedure (DSMC-PI). The results show that FDSMC outperforms DSMC.

Ali Karami-Mollaee

Oscar Barambones

Computation

Computation a journal of computational science and engineering. Topics: computational biology, including, but not limited to:  bioinformatics  mathematical modeling, simulation and prediction of nucleic acid (DNA/RNA) and protein sequences, structure and functions  mathematical modeling of pathways and genetic interactions  neuroscience computation including neural modeling, brain theory and neural networks  computational chemistry, including, but not limited to:  new theories and methodology including their applications in molecular dynamics  computation of electronic structure  density functional theory  designing and characterization of materials with computation method  computation in engineering, including, but not limited to:  new theories, methodology and the application of computational fluid dynamics (CFD)  optimisation techniques and/or application of optimisation to multidisciplinary systems  system identification and reduced order modelling of engineering systems  parallel algorithms and high performance computing in engineering.

Computation is a journal dedicated to computational science and engineering. The main topics include computational biology, covering but not limited to bioinformatics, mathematical modeling, simulation, and prediction of nucleic acid (DNA/RNA) and protein sequences, modeling of pathways and genetic interactions; neuroscience computation, including neural modeling, brain theory, and neural networks; computational chemistry, encompassing new theories and methodologies, including their applications in molecular dynamics, electronic structure computation, density functional theory, and computational methods for designing and characterizing materials; and computation in engineering, which includes new theories, methodologies, and applications of computational fluid dynamics (CFD), optimization techniques and their applications to multidisciplinary systems, system identification, reduced-order modeling of engineering systems, and parallel algorithms and high-performance computing in engineering.

《Computation》是一本关于计算科学与工程的期刊。主要涉及的主题包括：计算生物学，涵盖但不限于生物信息学、核酸（DNA/RNA）和蛋白质序列的数学建模、模拟与预测、通路和基因相互作用的数学建模；神经科学计算，包括神经建模、大脑理论和神经网络；计算化学，涵盖但不限于新理论和方法论及其在分子动力学中的应用、电子结构计算、密度泛函理论、材料设计与表征的计算方法；工程计算，包括但不限于新理论、方法论及计算流体动力学（CFD）的应用、优化技术及其在多学科系统中的应用、工程系统的系统识别和降阶建模、工程中的并行算法和高性能计算。

On Adaptive Fractional Dynamic Sliding Mode Control of Suspension System

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Category	Quartile
MATHEMATICS, INTERDISCIPLINARY APPLICATIONS	2