Singular System-Based Approach for Active Vibration Control of Vehicle Seat Suspension

2020 ◽  
Vol 142 (9) ◽  
Author(s):  
Wenxing Li ◽  
Haiping Du ◽  
Zhiguang Feng ◽  
Donghong Ning ◽  
Weihua Li ◽  
...  
Keyword(s):  
Vibration Control ◽  
Ride Comfort ◽  
Actuator Saturation ◽  
Singular System ◽  
Active Vibration Control ◽  
Seat Suspension ◽  
Active Vibration ◽  
System States ◽  
Suspension Model ◽  
Vehicle Seat

Abstract This paper proposes a singular system-based approach for active vibration control of vehicle seat suspensions, where the drivers' acceleration is augmented into the conventional seat suspension model together with seat suspension deflection and relative velocity as system states to make the suspension model as a singular system. In this novel seat suspension system, all the system states are easy to measure in real-time. A friction observer is applied to estimate the real system friction and an H∞ controller is designed to achieve the optimal ride comfort performance with consideration of the friction compensation, actuator saturation, and time delay issues. The cone complementarity linearization (CCL) algorithm is applied to solve the nonlinear constraints. The experimental results show that good ride comfort performance can be achieved by the proposed controller in both the time and frequency domain compared with the uncontrolled seat suspension.

scholarly journals A Review of Low-Frequency Active Vibration Control of Seat suspension Systems

2019 ◽  
Vol 9 (16) ◽  
pp. 3326 ◽  
Author(s):  
Zhao ◽  
Wang
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Low Frequency ◽  
Control Algorithms ◽  
Seat Suspension ◽  
Suspension Systems ◽  
Low Frequency Vibration ◽  
Recent Developments ◽  
Active Vibration ◽  
Artificial Neural Network Ann

As a major device for reducing vibration and protecting passengers, the low-frequency vibration control performance of commercial vehicle seating systems has become an attractive research topic in recent years. This article reviews the recent developments in active seat suspensions for vehicles. The features of active seat suspension actuators and the related control algorithms are described and discussed in detail. In addition, the vibration control and reduction performance of active seat suspension systems are also reviewed. The article also discusses the prospects of the application of machine learning, including artificial neural network (ANN) control algorithms, in the development of active seat suspension systems for vibration control.

Active vibration control of structures using a leader–follower-based consensus design

2016 ◽  
Vol 24 (1) ◽  
pp. 60-72 ◽  
Author(s):  
Ehsan Omidi ◽  
S Nima Mahmoodi
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Active Vibration Control ◽  
Flexible Structures ◽  
Distributed Parameter ◽  
Arbitrary Form ◽  
Piezoelectric Layers ◽  
Active Vibration ◽  
System States ◽  
Virtual Leader

This paper proposes a new leader–follower-based consensus vibration controller to actively suppress unwanted oscillations in distributed-parameter flexible structures. Actuation and sensing is performed via piezoelectric layers in a collocated sense. The actuator/sensor patches for the vibration control system are considered to collaborate in a network, and follow a virtual leader which is accessible to all agents. Hence, a vibration controller law is defined, to remove disagreement between agents and force the agents to follow the virtual leader. The proposed approach is an observer-based design, in which an optimal consensus state estimator is initially designed. Stability of the closed-loop system is investigated and the optimality conditions of the system are derived. Although the designed vibration controller could be implemented for suppression tasks in different distributed-parameter systems, a flexible clamped-clamped beam is used here for equation derivation and numerical performance verification. According to the results, the optimal observer estimates the system states in a finite time, as expected, and the vibration controller suppresses unwanted oscillations, either in resonant or arbitrary form, to a much lower level; while the disagreement between agents converges to zero. Additionally, suppression performance and robustness of the controller to failure in control system elements is investigated in comparison with a conventional positive position feedback controller, and its superiority is illustrated and discussed.

Active Vibration Control of a Double-Curved Shell Structure Using the Example of Stuttgart Smartshell

2012 ◽  
Author(s):  
Martin Weickgenannt ◽  
Oliver Sawodny ◽  
Stefan Neuhaeuser ◽  
Werner Sobek
Keyword(s):  
Vibration Control ◽  
Control Strategy ◽  
Shell Structure ◽  
Active Vibration Control ◽  
Optimal Control Strategy ◽  
Present Contribution ◽  
Control Concept ◽  
Hydraulic Cylinders ◽  
Active Vibration ◽  
System States

The present contribution deals with concepts for active vibration control of a thin double-curved shell structure. The structure, Stuttgart SmartShell, is located at the University of Stuttgart. It is made of softwood and is equipped with strain gages to determine the state of static and dynamic loading. Furthermore a force input is provided at the supports of the structure using hydraulic cylinders. Here a model-based two-degree-of-freedom control concept for vibration damping is presented which is based on a dynamical model derived from Finite Element simulations. The control strategy uses modal decoupling of the system states to enable the manipulation and damping of single eigenmodes. An optimal control strategy is chosen to dampen oscillations as quickly as possible while considering limitations on the force input and peak stresses. The proposed control algorithms are applied to the shell structure under consideration and their applicability is demonstrated by simulation and experimental results.

Semi-active vibration control of an 8x8 armored wheeled platform

2016 ◽  
Vol 24 (2) ◽  
pp. 283-302 ◽  
Author(s):  
MW Trikande ◽  
NK Karve ◽  
R Anand Raj ◽  
VV Jagirdar ◽  
R Vasudevan
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Vibration Control ◽  
Ride Comfort ◽  
Control Strategies ◽  
Active Vibration Control ◽  
Active Suspension ◽  
Fire Control ◽  
Ride Control ◽  
Active Vibration

This study proposes skyhook and fuzzy logic based semi-active control strategies to isolate sprung mass motions of 8x8 military vehicle and provide ride quality, road holding and firing accuracy for a platform, removing the passivity constraints of semi-active suspension system. The governing differential equations of motion of 8x8 platform for semi-active vibration control are formulated analytically and validated under multi body dynamics environment. Sprung mass acceleration and displacement are measured on a quarter car set up experimentally to assess the efficacy of skyhook and fuzzy logic controllers. Control strategies, viz. continuous skyhook control, cascade loop control and cascade loop with ride control are implemented. Cascade loop with ride control is employed such that the outer loop stabilizes heave, pitch and roll motions of full vehicle whereas the inner loop, through fuzzy controller, isolates vehicle from uneven disturbances. Various parametric studies are also performed with 8x8 semi-active suspension systems in terms of stochastic road inputs to represent cross country terrain profile. Furthermore, effect of proposed strategies on ride comfort, road holding, amplitude and settling time of vehicle body motions after firing large projectile from gun and aiming accuracy of the fire control system are investigated. It is demonstrated that cascade loop with ride control in semi-active mode improves vehicle ride comfort and road holding and accuracy of fire control system and rate of fire of gun.

scholarly journals Semi-active vibration control of horizontal seat suspension by using magneto-rheological damper

2019 ◽  
Vol 57 (2) ◽  
pp. 411-420 ◽  
Author(s):  
Igor Maciejewski ◽  
Tomasz Krzyżyński ◽  
Sebastian Pecolt ◽  
Sebastian Chamera
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Seat Suspension ◽  
Active Vibration ◽  
Magneto Rheological

Modeling and vibration control of an active horizontal seat suspension with pneumatic muscles

2018 ◽  
Vol 24 (24) ◽  
pp. 5938-5950 ◽  
Author(s):  
Igor Maciejewski ◽  
Tomasz Krzyzynski ◽  
Henning Meyer
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Control Algorithm ◽  
Active Vibration Control ◽  
System Structure ◽  
Seat Suspension ◽  
Inverse Models ◽  
Pneumatic Muscles ◽  
Active Vibration ◽  
Improved Performance

In the following paper, the dynamic modeling of a horizontal seat suspension which uses pneumatic muscles for the purpose of active vibration control is discussed. An original control system structure is proposed in order to improve the vibro-isolation properties of a horizontal seat suspension system. The presented control system design is based on inverse models of the pneumatic muscles and the primary controller that calculates the desired active force. By using the configurable control algorithm developed in this paper, it is possible to achieve a significant reduction in vibrations transmitted into the human body with just a slight increasing of the suspension travel. The active seat shows improved performance over the passive system in the 1–10 Hz frequency range. The results presented in this paper are useful in selecting the horizontal vibration control system for improving the comfort of a drive.

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