Adaptive vibration control of a mechanical system with nonlinear damping excited by a tonal disturbance

2015 ◽  
Vol 137 (4) ◽  
pp. 2258-2258
Author(s):  
Michele Zilletti ◽  
Stephen J. Elliott ◽  
Maryam Ghandchi Tehrani
Keyword(s):  
Vibration Control ◽  
Mechanical System ◽  
Nonlinear Damping ◽  
Adaptive Vibration Control

Robust adaptive vibration control for a string with time-varying output constraint

2018 ◽  
Vol 28 (17) ◽  
pp. 5213-5231 ◽  
Author(s):  
Wei He ◽  
Zhe Jing ◽  
Xiuyu He ◽  
Jin-Kun Liu ◽  
Changyin Sun
Keyword(s):  
Vibration Control ◽  
Time Varying ◽  
Robust Adaptive ◽  
Adaptive Vibration Control ◽  
Output Constraint

scholarly journals Applications of Approximate Optimal Control to Nonlinear Systems of Tracked Vehicle Suspensions

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Yan-Jun Liang ◽  
You-Jun Lu ◽  
De-Xin Gao ◽  
Zhong-Sheng Wang
Keyword(s):  
Optimal Control ◽  
Vibration Control ◽  
Ride Comfort ◽  
Nonlinear Dynamic System ◽  
Active Suspension ◽  
Nonlinear Damping ◽  
Tracked Vehicle ◽  
Control Approach ◽  
Vehicle Suspensions ◽  
Suspension Systems

AbstractTechnique of approximate optimal vibration control and simulation for vehicle active suspension systems are developed. Considered the nonlinear damping of springs, mechanical model and a nonlinear dynamic system for a class of tracked vehicle suspension vibration control are established and the corresponding system of state space form is described. To prolong the working life of suspension system and improve ride comfort, based on the active suspension vibration control devices and using optimal control approach, an approximate optimal vibration controller is designed, and an algorithm is presented for the vibration controller. Numerical simulation results illustrate the effectiveness of the proposed technique.

Energy-Harvesting Adaptive Vibration Damping in High-Speed Train Suspension using Electromagnetic Dampers

2021 ◽  
pp. 2140002
Author(s):  
Qinlin Cai ◽  
Yingyu Hua ◽  
Songye Zhu
Keyword(s):  
Energy Harvesting ◽  
Vibration Control ◽  
Output Power ◽  
High Speed ◽  
Vibration Damping ◽  
Numerical Results ◽  
Dual Function ◽  
High Speed Train ◽  
Adaptive Vibration Control ◽  
Electromagnetic Damper

Electromagnetic damper cum energy harvester (EMDEH) is an emerging dual-function device that enables simultaneous energy harvesting and vibration control. This study presents a novel energy-harvesting adaptive vibration control application of EMDEH on the basis of the past EMDEH development in passive control. The proposed EMDEH comprises an electromagnetic damper connected to a specifically designed energy harvesting circuit (EHC), wherein the EHC is a buck–boost converter with a microcontroller unit (MCU) and a bridge rectifier. The effectiveness of the energy-harvesting adaptive vibration damping is validated numerically through a high-speed train (HST) model running at different speeds. MCU-controlled adaptive duty cycle adjustment in the EHC enables the EMDEHs to adaptively offer the optimal damping coefficients that are highly dependent on train speeds. In the meantime, the harvested power can be stored in rechargeable batteries by the EHC. Numerical results project the average output power ranging from 40.5[Formula: see text]W to 589.8[Formula: see text]W from four EMDEHs at train speed of 100–340[Formula: see text]km/h, with a maximum output power efficiency of approximately 35%. In comparison to energy-harvesting passive vibration control and a pure viscous damper, the proposed energy-harvesting adaptive control strategy can improve vibration reductions by approximately 40% and 27%, respectively, at a speed of 340[Formula: see text]km/h. These numerical results clearly demonstrate the benefit and prospect of the proposed energy-harvesting adaptive vibration control in HST suspensions.

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