Modeling and Control of a Nonlinear Active Suspension Using Multi-Body Dynamics System Software

2014 ◽  
Vol 67 (1) ◽  
Author(s):  
M. Fahezal Ismail ◽  
Y. M. Sam ◽  
S. Sudin ◽  
K. Peng ◽  
M. Khairi Aripin
Keyword(s):  
Ride Comfort ◽  
Active Suspension ◽  
Suspension System ◽  
Ride Quality ◽  
System Software ◽  
Composite Nonlinear Feedback ◽  
Modeling And Control ◽  
Body Dynamics ◽  
Multi Body ◽  
And Control

This paper describes the mathematical modeling and control of a nonlinear active suspension system for ride comfort and road handling performance by using multi-body dynamics software so-called CarSim. For ride quality and road handling tests the integration between MATLAB/Simulink and multi-body dynamics system software is proposed. The control algorithm called the Conventional Composite Nonlinear Feedback (CCNF) control was introduced to achieve the best transient response that can reduce to overshoot on the sprung mass and angular of control arm of MacPherson active suspension system. The numerical experimental results show the control performance of CCNF comparing with Linear Quadratic Regulator (LQR) and passive system. 

Investigation on Semi-active Suspension System for Multi-axle Armoured Vehicle using Co-simulation

2017 ◽  
Vol 67 (3) ◽  
pp. 269
Author(s):  
Mukund W. Trikande ◽  
Vinit V. Jagirdar ◽  
Vasudevan Rajamohan ◽  
P.R. Sampat Rao
Keyword(s):  
Fuzzy Logic Controller ◽  
Ride Comfort ◽  
Control Strategies ◽  
Integrated Control ◽  
Active Suspension ◽  
Suspension System ◽  
Ride Quality ◽  
Actual System ◽  
Loop Control ◽  
Ride Control

<p>The objective of the study is to evaluate the performance of various semi-active suspension control strategies for 8x8 multi-axle armoured vehicles in terms of comparative analysis of ride quality and mobility parameters during negotiation of typical military obstacles. Since the cost, complexity and time precludes realisation of actual system, co-simulation technique has been effectively implemented for this investigation. Co-simulation combines advanced virtual prototyping and control technology which offers a novel approach to investigate the dynamics of such complex system. The simulations for the integrated control system along with multi body model of the vehicle are carried out for the control strategies, viz. continuous sky hook control, cascade loop control and cascade loop with ride control and compared with passive suspension system. The vehicle with 8x8 configuration is run on the real world obstacle profiles, viz. step, trench, trapezoidal bump and corrugated road and the effect of control strategies on ride comfort, wheel displacement and ground reaction is presented. It is observed that cascade loop with ride control in semi-active mode offers better vehicle ride comfort while crossing the said obstacles. The improved performance parameters are achieved through stabilisation of heave, pitch and roll motions of the vehicle through outer loop and isolation of vehicle level uneven disturbances through the fuzzy logic controller employed in inner loop.</p>

scholarly journals Hybrid Modelling and Sliding Mode Control of Semi-Active Suspension Systems for Both Ride Comfort and Road-Holding

Symmetry ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1286
Author(s):  
Ayman Aljarbouh ◽  
Muhammad Fayaz
Keyword(s):  
Hybrid Model ◽  
Ride Comfort ◽  
Sliding Mode ◽  
Active Suspension ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Suspension Systems ◽  
Active Suspension Systems ◽  
System Components ◽  
And Control

Rigorous model-based design and control for intelligent vehicle suspension systems play an important role in providing better driving characteristics such as passenger comfort and road-holding capability. This paper investigates a new technique for modelling, simulation and control of semi-active suspension systems supporting both ride comfort and road-holding driving characteristics and implements the technique in accordance with the functional mock-up interface standard FMI 2.0. Firstly, we provide a control-oriented hybrid model of a quarter car semi-active suspension system. The resulting quarter car hybrid model is used to develop a sliding mode controller that supports both ride comfort and road-holding capability. Both the hybrid model and controller are then implemented conforming to the functional mock-up interface standard FMI 2.0. The aim of the FMI-based implementation is to serve as a portable test bench for control applications of vehicle suspension systems. It fully supports the exchange of the suspension system components as functional mock-up units (FMUs) among different modelling and simulation platforms, which allows re-usability and facilitates the interoperation and integration of the suspension system components with embedded software components. The concepts are validated with simulation results throughout the paper.

scholarly journals Multi-Body Dynamics Modeling and Control for Strapdown Inertially Stabilized Platforms Considering Light Base Support Characteristics

2020 ◽  
Vol 10 (20) ◽  
pp. 7175
Author(s):  
Zhongshi Wang ◽  
Dapeng Tian ◽  
Lei Shi ◽  
Jinghong Liu
Keyword(s):  
Disturbance Compensation ◽  
Dynamics Modeling ◽  
Tracking Accuracy ◽  
Dynamics Model ◽  
Modeling And Control ◽  
Body Dynamics ◽  
Feedforward Controller ◽  
Multi Body ◽  
And Control ◽  
Compound Disturbance

The dynamics model used for inertially or strapdown inertially stabilized platforms is based on the rotor and motor load, and it either does not consider the stator or it implicitly assumes a fixed stator. It has been determined that vibrations occur in the system when a controller is used in strapdown inertially stabilized platforms with a light base support. As the system is also affected by multi-source disturbances, which are the main factors that affect the control accuracy. For the above two problems, this paper originally establishes a multi-body dynamics model including the controller. The composite controller not only suppresses the vibration successfully, but also greatly improves the disturbance compensation and tracking performance of the strapdown inertially stabilized platforms. Specifically, a modified feedback controller is used to suppress the vibrations analyzed according to the dynamics model. The friction feedforward and residual disturbance observer facilitates the design of compound disturbance compensation on the basis of composite hierarchical anti-disturbance control. To emphasize the advantages of strapdown inertially stabilized platforms, the feedforward controller employs feedforward angular velocity and acceleration. The results of the numerical analysis and experiments indicate that vibrations are successfully suppressed and tracking accuracy and disturbance isolation ability are improved.

Sign in / Sign up

Export Citation Format

Share Document