ELECTRO-PNEUMATIC ABSORBER IN THE VEHICLE SUSPENSION SYSTEMS

2016 ◽  
Vol 3 (1) ◽  
pp. 0-0
Author(s):  
Демин ◽  
A. Demin ◽  
Исупов ◽  
S. Isupov ◽  
Хамитов ◽  
...  
Keyword(s):  
Free Vibration ◽  
Software Package ◽  
Vibration Mode ◽  
Motor Vehicles ◽  
Vehicle Suspension ◽  
Systems Modeling ◽  
Limited Capacity ◽  
Matlab Simulink ◽  
Passive Suspension ◽  
Suspension Systems

The article shows the limited capacity of the traditional (passive) suspension systems to meet the constantly increasing requirements imposed on modern motor vehicles, as well as the expediency of application of controlled suspension systems. Modeling of processes in the system with the electromagnetic compensator stiffness in the free vibration mode in the software package Matlab Simulink.

Ride Evaluation of Vehicle Suspension Employing Non-Linear Inerter

2013 ◽  
Vol 471 ◽  
pp. 9-13 ◽  
Author(s):  
M.F. Soong ◽  
Rahizar Ramli ◽  
Wan Nor Liza Wan Mahadi
Keyword(s):  
Ride Comfort ◽  
Relative Displacement ◽  
Free Play ◽  
Lower Percentage ◽  
Vehicle Suspension ◽  
Control Law ◽  
Passive Suspension ◽  
Suspension Systems ◽  
Lower Root ◽  
Non Linear

Inerter is a recent element in suspension systems with the property that the generated force is proportional to the relative acceleration between its two terminals, which is similar to the way a spring reacts to relative displacement and a damper to relative velocity. This paper presents the analysis of a non-linear inerter working in parallel to passive spring and damper of a vehicle suspension to evaluate its effect on vehicles ride. The non-linear inerter was theoretically capable of switching between on and off states depending on whether or not the suspension deflection was beyond a specified free play. In the study, this behavior was represented mathematically as control law which depended on the relative displacement between the sprung and unsprung masses. A mathematical quarter vehicle model incorporating the non-linear inerter was simulated in MATLAB/Simulink to determine the vehicle responses due to road input in the form of step profile for different combinations of free play and inerters on-state proportionality constant called the inertance. Results showed improvements in vehicle ride comfort, as demonstrated by the lower root-mean-squared sprung mass accelerations compared to the ordinary passive suspension with only spring and damper. Additionally, implementation of non-linear inerter gave lower percentage overshoot to step input, indicating better transient response than ordinary passive suspension.

Active Vehicle Suspension Control Using Full State-Feedback Controller

2015 ◽  
Vol 1115 ◽  
pp. 440-445 ◽  
Author(s):  
Musa Mohammed Bello ◽  
Amir Akramin Shafie ◽  
Raisuddin Khan
Keyword(s):  
State Feedback ◽  
Ride Comfort ◽  
Active Suspension ◽  
Suspension System ◽  
Feedback Controller ◽  
Vehicle Suspension ◽  
Passive Suspension ◽  
Full State ◽  
Full State Feedback ◽  
Passive Suspension System

The main purpose of vehicle suspension system is to isolate the vehicle main body from any road geometrical irregularity in order to improve the passengers ride comfort and to maintain good handling stability. The present work aim at designing a control system for an active suspension system to be applied in today’s automotive industries. The design implementation involves construction of a state space model for quarter car with two degree of freedom and a development of full state-feedback controller. The performance of the active suspension system was assessed by comparing it response with that of the passive suspension system. Simulation using Matlab/Simulink environment shows that, even at resonant frequency the active suspension system produces a good dynamic response and a better ride comfort when compared to the passive suspension system.

The Design of Variable Antidive Vehicle Suspension Systems

1976 ◽  
Vol 98 (1) ◽  
pp. 171-175
Author(s):  
D. Metz ◽  
A. Carlson ◽  
L. Golden ◽  
R. Owen
Keyword(s):  
Vehicle Suspension ◽  
Suspension Systems

Variable antidive suspension characteristics represent an excellent design compromise between 100 percent dive compensation and ride harshness. This paper develops a simple suspension modification which permits wide flexibility in the choice of variable antidive to be used by a vehicle designer. A sample suspension design is presented for which variable antidive characteristics are developed.

scholarly journals Control of Nonlinear Active Vehicle Suspension Systems Using Disturbance Observers

10.5772/25131 ◽  
2011 ◽  
Author(s):  
Francisco Beltran-Carbajal ◽  
Esteban Chavez-Conde ◽  
Gerardo Silva ◽  
Benjamin Vazquez ◽  
Antonio Favela
Keyword(s):  
Vehicle Suspension ◽  
Suspension Systems

scholarly journals STRESSING ISSUE OF A PIEZOCERAMIC CANTILEVER WITH LONGITUDINAL POLARISATION AND ELECTRODE COATINGS

2020 ◽  
Vol 19 (2) ◽  
pp. 113
Author(s):  
Igor Jovanović ◽  
Ljubiša Perić ◽  
Uglješa Jovanović ◽  
Dragan Mančić
Keyword(s):  
General Solution ◽  
Free Vibration ◽  
Electric Potential ◽  
Software Package ◽  
Longitudinal Polarization ◽  
Main Subject ◽  
Piezoceramic Material ◽  
Coupled Equations ◽  
Specific Strain ◽  
Simulation Results

The main subject of this study is the investigation of the free vibration of a rectangular prismatic piezoceramic cantilever with longitudinal polarization and electrode coatings. Based on the general solution of coupled equations for piezoceramic material, applying the equations of electro-elasticity and satisfying electrical and mechanical conditions for the stress of a cantilever made from PZT4 piezoceramic material, componential displacements, electric potential, specific strain, electric field, and piezoelectric displacement, are determined and numerically obtained with Matlab software package. Based on the obtained equations and simulation results, it is possible to optimize the dimensions of the cantilever and determine the type of piezoceramic.

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