A New Semi-Active Suspension System for Vehicle Applications

Siramdasu, Yaswanth; Taheri, Saied

doi:10.1115/dscc2017-5302

Cited by 3 publications

(1 citation statement)

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“…Suspension systems work as an isolator for the vehicle body from road irregularities. From the 1980's extensive researches aid in the improvement of the suspension systems from passive to active, then at the end into semi-active suspension systems [1].…”

Section: Introductionmentioning

confidence: 99%

Online DE Optimization for Fuzzy-PID Controller of Semi-Active Suspension System Featuring MR Damper

et al. 2022

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In pursue of a comfortable vehicle driving in different road profiles, intelligent methods used to improve the suspension system of the vehicle. Semi-active suspension system outperformed other suspension systems because it contains an intelligent actuator that can give the appropriate force to dissipate unwanted vibration using intelligent and real-time controllers. Here in this paper MR fluid damper with Fuzzy-PID controller examined to optimized using modified DE algorithm. However, in the Fuzzy-PID controller, the fuzzy logic algorithm is used to autotune the PID controller, but it cannot be considered as a fully real-time controller since the fuzzy algorithm uses a previous knowledge base built offline. The offline design of Fuzzy algorithm cannot cope with real-time unexpected vibrations occurred while driving car in different road profiles. In this paper, a Fuzzy-DE-PID controller proposed based on modified DE algorithm to enhance the Fuzzy logic gains in order to increase vehicle semi-active suspension system performance. To prove the effectiveness of the proposed controllers, a simulation and experimental tests were conducted using the proposed controller with different disturbances. The results of the simulation and the experimental tests for the proposed controller showed improvement of the vehicle's ride comfort over the Fuzzy-PID and the passive system. We believe that using this proposed controller in any other real-time application will improve the performance to the highest levels without the need for a previous knowledge base for designing a realtime Fuzzy-PID controller.

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Section: Introductionmentioning

confidence: 99%

Online DE Optimization for Fuzzy-PID Controller of Semi-Active Suspension System Featuring MR Damper

et al. 2022

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The Reduced-Order Modeling Approach for a Double-Damper Concept: A Comparison with a Single Damper for Comfort Analysis

Hamedi,

Shrikanthan,

Taheri

2024

Vibration

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This paper explores the modeling and simulation of an innovative double-damper suspension system, evaluating its effectiveness through different test scenarios. The double damper integrates two individual dampers into a unified assembly. The modeling process involves representing the damper as two distinct dampers and a body block, accounting for the additional degree of freedom introduced by combining the two dampers. Simulink/MATLAB is employed for modeling the pressure, discharge, and force equations of the damper. A simplified quarter-car model is designed to conduct simulations for different road profiles, evaluating the efficacy of this double-damper model. The reduced-order modeling approach, suitable for complex systems like dampers, is utilized. Dedicated mathematical models are utilized to examine both single- and double-damper configurations, with the resulting non-linear equations solved using Newton’s iterative method. The equations derived for the single damper provide the basis for modeling the double-damper system. In this model, two separate dampers, each possessing similar properties, are simulated and considered to be rigidly linked at their connection point. Consequently, it is assumed that a portion of the force and velocity experienced by the lower damper is transmitted to the upper damper, and vice versa. Simulation results demonstrate that the innovative double-damper design outperforms a single passive damper in attenuating the oscillations of both the sprung and unsprung masses. Moreover, this innovative concept offers increased adaptability to balance between ride comfort and road holding, a feature previously limited to passive suspension systems.

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Exploring and Comparing Control Strategies for a Novel Double Damper Suspension System

Hamedi,

Shrikanthan,

Taheri

2024

SAE Int. J. Passeng. Veh. Syst.

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<div>In the highly competitive landscape of the automotive industry, enhancing ride comfort has become a paramount challenge for automakers. To address this challenge, a novel double damper suspension system has been investigated. This system, featuring two single dampers operating collaboratively as an integrated unit, is analyzed with a dual focus: a comprehensive comparison of various control algorithms to identify the one offering superior comfort and the experimental validation of these findings. The modeling process, executed in Simulink, encompasses the representation of pressure, discharge, and force equations, along with the development and testing of multiple control algorithms. The study employs a shock dynamometer, utilizing both the double damper and a single semi-active damper as test subjects in a pseudo-quarter-car test bed setup. Throughout the experimental phase, solenoid actuation in the dampers is guided by specific control logic, utilizing acceleration data for the sprung and unsprung masses. Results demonstrate that the double damper significantly enhances road holding and ride comfort compared to a single damper concept. The study encompasses a spectrum of control algorithms, including Skyhook Control, Groundhook Control, ADD Control, and PID Control. Notably, PID Control emerges as the most balanced algorithm in terms of comfort improvement. Crucially, the experimental results validate the effectiveness of the proposed double damper system. This research positions the double damper concept as a promising and viable alternative for automakers seeking to elevate comfort levels of their vehicles among a competitive market.</div>

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A New Semi-Active Suspension System for Vehicle Applications

Cited by 3 publications

References 0 publications

Online DE Optimization for Fuzzy-PID Controller of Semi-Active Suspension System Featuring MR Damper

Online DE Optimization for Fuzzy-PID Controller of Semi-Active Suspension System Featuring MR Damper

The Reduced-Order Modeling Approach for a Double-Damper Concept: A Comparison with a Single Damper for Comfort Analysis

Exploring and Comparing Control Strategies for a Novel Double Damper Suspension System

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