scholarly journals Design of Constrained Robust Controller for Active Suspension of In-Wheel-Drive Electric Vehicles

Mathematics ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 249
Author(s):  
Xianjian Jin ◽  
Jiadong Wang ◽  
Shaoze Sun ◽  
Shaohua Li ◽  
Junpeng Yang ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Ride Comfort ◽  
Controller Design ◽  
Active Suspension ◽  
Suspension System ◽  
Parameter Uncertainties ◽  
Dynamic Vibration Absorber ◽  
Robust Controller ◽  
Wheel Drive ◽  
Suspension Model

This paper presents a constrained robust H∞ controller design of active suspension system for in-wheel-independent-drive electric vehicles considering control constraint and parameter variation. In the active suspension system model, parameter uncertainties of sprung mass are analyzed via linear fraction transformation, and the perturbation bounds can be also limited, then the uncertain quarter-vehicle active suspension model where the in-wheel motor is suspended as a dynamic vibration absorber is built. The constrained robust H∞ feedback controller of the closed-loop active suspension system is designed using the concept of reachable sets and ellipsoids, in which the dynamic tire displacements and the suspension working spaces are constrained, and a comprehensive solution is finally derived from H∞ performance and robust stability. Simulations on frequency responses and road excitations are implemented to verify and evaluate the performance of the designed controller; results show that the active suspension with a developed H∞ controller can effectively achieve better ride comfort and road-holding ability compared with passive suspension despite the existence of control constraints and parameter variations.

Development of Active Suspension System for a Pot Hole Using PID Controller

2011 ◽  
Vol 308-310 ◽  
pp. 2266-2270
Author(s):  
Mouleeswaran Senthilkumar
Keyword(s):  
Pid Controller ◽  
Ride Comfort ◽  
Control Method ◽  
Controller Design ◽  
Active Suspension ◽  
Suspension System ◽  
Operating Conditions ◽  
Hydraulic Actuator ◽  
Time Domains ◽  
Spool Valve

This paper describes the development of a controller design for the active control of suspension system, which improves the inherent tradeoff among ride comfort, suspension travel and road-holding ability. The developed design allows the suspension system to behave differently in different operating conditions, without compromising on road-holding ability. The effectiveness of this control method has been explained by data from time domains. Proportional-Integral-Derivative (PID) controller including hydraulic dynamics has been developed. The displacement of hydraulic actuator and spool valve is also considered. The Ziegler – Nichols tuning rules are used to determine proportional gain, reset rate and derivative time of PID controller. Simulink diagram of active suspension system is developed and analysed using MATLAB software. The investigations on the performance of the developed active suspension system are demonstrated through comparative simulations in this paper.

LQG-Based Robust Control of Active Automobile Suspension

2003 ◽  
Author(s):  
H. Porumamilla ◽  
A. G. Kelkar
Keyword(s):  
Closed Loop ◽  
Ride Comfort ◽  
Controller Design ◽  
Control Design ◽  
Suspension System ◽  
Robust Controller ◽  
Automobile Suspension ◽  
Active Feedback ◽  
Active Feedback Control ◽  
Robust Controller Design

This paper presents robust controller design for an active automobile suspension system using an interative LQG design technique. The main objective is to design an active feedback control for an automobile suspension system to ensure the ride comfort for passengers in the presence of unknown road disturbances. The control system designed is shown to be robust to uncertainties and parametric variations. The resulting interative LQG-based control design is shown to achieve a significant improvement in the performance, while maintaining a desired level of closed-loop stability that is robust to plant uncertainties and parametric variations. The controller design is also compared to some other active suspension designs published in the literature.

scholarly journals ENHANCING CAR RIDE COMFORT USING A BALANCED CONTROLLER DESIGN FOR SEMI-ACTIVE SUSPENSION SYSTEM

2020 ◽  
Vol 225 (02) ◽  
pp. 31-38
Author(s):  
Vũ Văn Tấn
Keyword(s):  
Ride Comfort ◽  
Controller Design ◽  
Active Suspension ◽  
Suspension System ◽  
Viet Nam

Độ êm dịu chuyển động là một yếu tố quan trọng trong việc thiết kế ô tô. Có nhiều cách tiếp cận có thể được sử dụng để nâng cao đặc tính này, trong đó các nhà nghiên cứu Việt Nam và thế giới quan tâm đến hệ thống treo bán tích cực. Bài báo này giới thiệu phương pháp điều khiển cân bằng được sử dụng cho hệ thống treo bán tích cực với hai chiến lược điều khiển bao gồm bộ điều khiển cân bằng on-off và liên tục. Ý tưởng chính của chiến lược này là lực giảm chấn được điều khiển thay đổi sao cho có biên độ bằng với lực của lò xo nhưng ngược dấu. Điều này sẽ giảm gia tốc thẳng đứng của thân xe. Kết quả mô phỏng trên miền thời gian chỉ rõ rằng bằng cách sử dụng phương pháp điều khiển cân bằng, giá trị sai lệch bình phương trung bình của dịch chuyển thân xe, góc lắc dọc thân xe và gia tốc của chúng giảm từ 25% đến 50% so với hệ thống treo bị động.

scholarly journals Design and Development of an Active Suspension System Using Pneumatic-Muscle Actuator and Intelligent Control

2019 ◽  
Vol 9 (20) ◽  
pp. 4453 ◽  
Author(s):  
I-Hsum Li ◽  
Lian-Wang Lee
Keyword(s):  
Ride Comfort ◽  
Controller Design ◽  
Sliding Mode ◽  
Active Suspension ◽  
Suspension System ◽  
Vertical Force ◽  
Time Varying ◽  
Pneumatic Muscle ◽  
Pneumatic Muscle Actuator ◽  
Stability And Accuracy

A pneumatic muscle is a cheap, clean, and high-power active actuator. However, it is difficult to control due to its inherent nonlinearity and time-varying characteristics. This paper presents a pneumatic muscle active suspension system (PM-ASS) for vehicles and uses an experimental study to analyze its stability and accuracy in terms of reducing vibration. In the PM-ASS, the pneumatic muscle actuator is designed in parallel with two MacPherson struts to provide a vertical force between the chassis and the wheel. This geometric arrangement allows the PM-ASS to produce the maximum force to counter road vibration and make the MacPherson struts generate significant improvement. In terms of the controller design, this paper uses an adaptive Fourier neural network sliding-mode controller with H ∞ tracking performance for the PM-ASS, which confronts nonlinearities and time-varying characteristics. A state-predictor is used to predict the output error and to provide the predictions for the controller. Experiments with a rough concave-convex road and a two-bump excitation road use a quarter-car test rig to verify the practical feasibility of the PM-ASS, and the results show that the PM-ASS gives an improvement the ride comfort.

Research on Modeling and Optimization Control of Heavy Truck Cab Active Suspension System

2014 ◽  
Vol 687-691 ◽  
pp. 359-362
Author(s):  
Guang Hui Yan ◽  
Shuo Zhang
Keyword(s):  
Ride Comfort ◽  
Active Suspension ◽  
Suspension System ◽  
Roll Angle ◽  
Driving Safety ◽  
Stochastic Signal ◽  
Road Disturbance ◽  
Optimization Control ◽  
Heavy Truck ◽  
Suspension Model

In order to meet the ride comfort of the heavy truck cab, the 1/2 heavy truck cab active suspension model established. Based on this model the LQG optimization control was selected for the active control of a 1/2 heavy truck cab suspension system. The road disturbance is integral white noise stochastic signal. By the example simulation in Matlab/Simulink, the results show that the cab active suspension with LQG control strategy can decrease the vertical accelerations, the roll angle and roll angle acceleration of the truck cab, the active suspension can improve both the ride comfort and driving safety.

Observer and Controller Design for Half-Car Active Suspension System Using Singular Perturbation Theory

2011 ◽  
Vol 403-408 ◽  
pp. 4786-4793 ◽  
Author(s):  
M. Aghazadeh ◽  
H. Zarabadipour
Keyword(s):  
Perturbation Theory ◽  
Singular Perturbation ◽  
System Performance ◽  
Ride Comfort ◽  
Controller Design ◽  
Active Suspension ◽  
Suspension System ◽  
Singular Perturbation Theory ◽  
State Variables ◽  
Simulation Results

In this paper the singular perturbation theory is used to design observer for estimation of state variables for proper control of half-car active suspension system. The liner quadric Gaussian (LQG) controller has been used to obtain feedback gains. The suspension system performance is optimized with respect to ride comfort, tire deflections and front and rear suspension travels. The simulation results show that the proposed approach is highly effective in evaluating the performance of an active suspension system.

Performance analysis of MR damper based semi-active suspension system using optimally tuned controllers

2021 ◽  
pp. 095440702110044
Author(s):  
Gurubasavaraju Tharehalli mata ◽  
Vijay Mokenapalli ◽  
Hemanth Krishna
Keyword(s):  
Pid Controller ◽  
Ride Comfort ◽  
Sliding Mode ◽  
Dynamic Performance ◽  
Parametric Method ◽  
Mr Damper ◽  
Active Suspension ◽  
Suspension System ◽  
Sliding Mode Controller ◽  
Road Excitation

This study assesses the dynamic performance of the semi-active quarter car vehicle under random road conditions through a new approach. The monotube MR damper is modelled using non-parametric method based on the dynamic characteristics obtained from the experiments. This model is used as the variable damper in a semi-active suspension. In order to control the vibration caused under random road excitation, an optimal sliding mode controller (SMC) is utilised. Particle swarm optimisation (PSO) is coupled to identify the parameters of the SMC. Three optimal criteria are used for determining the best sliding mode controller parameters which are later used in estimating the ride comfort and road handling of a semi-active suspension system. A comparison between the SMC, Skyhook, Ground hook and PID controller suggests that the optimal parameters with SMC have better controllability than the PID controller. SMC has also provided better controllability than the PID controller at higher road roughness.

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.

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