Semi-active control of a passenger vehicle for improved ride and handling

2008 ◽  
Vol 222 (3) ◽  
pp. 325-352 ◽  
Author(s):  
G Tsampardoukas ◽  
C W Stammers ◽  
E Guglielmino
Keyword(s):  
Active Control ◽  
Human Body ◽  
Balance Control ◽  
Variable Structure ◽  
Structure Type ◽  
Magnetorheological Damper ◽  
Vehicle Speed ◽  
Passive Response ◽  
Spring Force ◽  
Ride And Handling

A theoretical model is developed for the semi-active control of the suspension of a full passenger car using a variable-structure-type algorithm. Skyhook control and variants of balance control (cancelling or adding the dynamic spring forces) are applied via a magnetorheological damper at the front and rear wheels to improve the vehicle ride and handling. The magnetorheological damper is modelled via a Bouc—Wen approach. The semi-active vehicle response is compared with a passive response. The robustness of control is established by adding noise to the computed sensor inputs, and the loose-wire scenario is also considered. The results show that balance control is a robust algorithm. The magnitude of acceleration reduction (for the human body and head—neck complex) using semi-active control varies with the semi-active approach and vehicle speed (a simulated random road was assumed). At 30m/s the human body acceleration reduction was found to be 70 per cent with skyhook control and 40 per cent with balance control (cancelling the dynamic spring forces). The handling manoeuvres of the vehicle are presented utilizing BS ISO 3888-1 1999. The handling performance of the vehicle is significantly improved, when balance control by cancelling is applied on the rear dampers only. Using skyhook control and balance control by adding a spring force to the system it is not possible to improve the handling response of the vehicle.

scholarly journals A Study of the Control of the Variable Structure-Type Locomotive Robot (4th Report, Postural Change and Locomotion by Jumping of the Control Arm/Leg-Type)

1992 ◽  
Vol 4 (6) ◽  
pp. 472-479
Author(s):  
Tomokazu Hirabayashi ◽  
◽  
Kazuo Yamafuji ◽  
Keyword(s):  
Human Body ◽  
Variable Structure ◽  
Structure Type ◽  
Center Of Gravity ◽  
The Body ◽  
Control Methods ◽  
Postural Change ◽  
Feedback Controls ◽  
Standing Up ◽  
Selection Of

The variable structure type locomotive robot developed in this study can be any of three variations (models) by the selection of controlling arms, wheels, and legs, in addition to the body. This paper reports the postural change and jumping motion of a third model of the robot which is composed of a pair of controlling arms and a leg mounted on each end of the body. Because the model was constructed to simulate the human body, its motions bear quite a resemblance to those of a human. The main results obtained by this study are as follows: (1) Sittingdown and standing-up motions were achieved by using control methods proposed in this study; (2) Locomotion by jumping at the standing-up posture of the robot was attained; and (3) It was verified experimentally that the compound center of gravity feedback controls unstable postures of the robot such as jumping and standing on the tip of the leg.

scholarly journals Integrated active and semi-active control for seat suspension of a heavy duty vehicle

2017 ◽  
Vol 29 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Donghong Ning ◽  
Shuaishuai Sun ◽  
Haiping Du ◽  
Weihua Li
Keyword(s):  
Resonance Frequency ◽  
Active Control ◽  
Integrated Control ◽  
Relative Displacement ◽  
Magnetorheological Damper ◽  
Active Force ◽  
Heavy Duty ◽  
Force Output ◽  
Seat Suspension ◽  
A Current

In this article, an integrated active and semi-active seat suspension for heavy duty vehicles is proposed, and its prototype is built; an integrated control algorithm applied measurable variables (suspension relative displacement and seat acceleration) is designed for the proposed seat prototype. In this seat prototype, an active actuator with low maximum force output (70 N), which is insufficient for an active seat suspension to control the resonance vibration, is applied together with a rotary magnetorheological damper. The magnetorheological damper can suppress the high vibration energy in resonance frequency, and then a small active force can further improve the seat suspension performance greatly. The suspension’s dynamic property is tested with a MTS system, and its model is identified based on the testing data. A modified on–off controller is applied for the rotary magnetorheological damper. A [Formula: see text] controller with the compensation of a disturbance observer is used for the active actuator. Considering the energy saving, the control strategy is designed as that only when the magnetorheological damper is in the off state (0 A current), the active actuator will have active force output, or the active actuator is off. Both simulation and experiment are implemented to verify the proposed seat suspension and controller. In the sinusoidal excitations experiment, the acceleration transmissibility of integrated control seat has lowest value in resonance frequency and frequencies above the resonance, when compared with power on (0.7 A current), power off (0 A current) and semi-active control seat. In the random vibration experiment, the root mean square acceleration of integrated control seat suspension has 47.7%, 33.1% and 26.5% reductions when compared with above-mentioned three kinds of seat suspension. The power spectral density comparison indicates that the integrated seat suspension will have good performance in practical application. The integrated active and semi-active seat suspension can fill energy consumption gap between active and semi-active control seat suspension.

scholarly journals MR Damper-Based Vibration Suppression Method for Control Moment Gyroscope

2018 ◽  
Vol 36 (5) ◽  
pp. 884-889
Author(s):  
Wendong Wang ◽  
Xing Ming ◽  
Yang Chu ◽  
Minghui Liu ◽  
Yikai Shi
Keyword(s):  
Active Control ◽  
Control Algorithm ◽  
Vibration Suppression ◽  
Control Method ◽  
Magnetorheological Damper ◽  
Magnetic Flux Density ◽  
Damping Force ◽  
Control Moment Gyroscope ◽  
Control Moment ◽  
Suppression Method

To restrain the interference of micro-vibration caused by Control Moment Gyroscope, a new control method based on Magnetorheological damper was proposed in this paper. A mechanical model based on the structure of the presented design was built, and the semi-active control algorithm of damping force was proposed for the designed Magnetorheological damper. The magnetic flux density and other magnetic field parameters were considered and analyzed in Maxwell, and also the related hardware circuit which implements the control algorithm was prepared to test the presented design and algorithm. The results of simulation and experiments show that the presented Magnetorheological damper model and semi-active control algorithm can complete the requirements, and the vibration suppression method is efficient for Control Moment Gyroscope.

An ABC-BP-ANN algorithm for semi-active control for Magnetorheological damper

2016 ◽  
Vol 21 (6) ◽  
pp. 2310-2321 ◽  
Author(s):  
Qiang Xu ◽  
Jianyun Chen ◽  
Xiaopeng Liu ◽  
Jing Li ◽  
Chenyang Yuan
Keyword(s):  
Active Control ◽  
Magnetorheological Damper

scholarly journals A Speed Control Method for Underwater Vehicle under Hydraulic Flexible Traction

2015 ◽  
Vol 2015 ◽  
pp. 1-16
Author(s):  
Yin Zhao ◽  
Ying-kai Xia ◽  
Ying Chen ◽  
Guo-Hua Xu
Keyword(s):  
Control System ◽  
Control Theory ◽  
Control Method ◽  
Sliding Mode ◽  
Variable Structure ◽  
Speed Control ◽  
Underwater Vehicle ◽  
Vehicle Speed ◽  
Sliding Mode Variable Structure ◽  
Traction System

Underwater vehicle speed control methodology method is the focus of research in this study. Driven by a hydraulic flexible traction system, the underwater vehicle advances steadily on underwater guide rails, simulating an underwater environment for the carried device. Considering the influence of steel rope viscoelasticity and the control system traction structure feature, a mathematical model of the underwater vehicle driven by hydraulic flexible traction system is established. A speed control strategy is then proposed based on the sliding mode variable structure of fuzzy reaching law, according to nonlinearity and external variable load of the vehicle speed control system. Sliding mode variable structure control theory for the nonlinear system allows an improved control effect for movements in “sliding mode” when compared with conventional control. The fuzzy control theory is also introduced, weakening output chattering caused by the sliding mode control switchover while producing high output stability. Matlab mathematical simulation and practical test verification indicate the speed control method as effective in obtaining accurate control results, thus inferring strong practical significance for engineering applications.

scholarly journals Prediction of Exhaust Emission Costs in Air and Road Transportation

2019 ◽  
Vol 11 (17) ◽  
pp. 4688 ◽  
Author(s):  
Olja Čokorilo ◽  
Ivan Ivković ◽  
Snežana Kaplanović
Keyword(s):  
Carbon Dioxide ◽  
Road Transport ◽  
Structure Type ◽  
Influential Factors ◽  
Operating Conditions ◽  
Air Transport ◽  
Transport Sector ◽  
Exhaust Emission ◽  
Vehicle Speed ◽  
Road Transportation

In this paper, the calculation of exhaust emission costs originating from aircraft and road vehicles in the base year 2017 and in the forecasting year 2032, in the Republic of Serbia, was carried out. The presented methodology includes a number of influential factors for air transport (airport capacity, number of operations, aircraft type, relevant engine, range) and for road transport (changing of traffic volumes, design and operating speeds, the quality of the pavement structure, type of terrain and category of road sections, dependence of exhaust emission from changes in vehicle speed). It was found that in the current operating conditions, the dominant costs in the total exhaust emission costs are the costs of nitrogen oxides (61%) in road transport, whilst carbon dioxide costs are dominant in air transport (52%). In the future, carbon dioxide costs will have a share of over 80% in the road transport sector and over 58% in the air transport sector in total exhaust emission costs. The average exhaust emission costs per one aircraft operation (international flights) will range from 141 to 145€. In road transport, the average exhaust emission costs at 100 km in 2032 will range from 1.8 to 2.2€.

Application of Magnetorheological Damper Semi-Active Control Based on Artificial Neural Networks

2010 ◽  
Vol 171-172 ◽  
pp. 654-658
Author(s):  
De Kun Yue ◽  
Qi Wang
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Artificial Neural Networks ◽  
System Identification ◽  
Active Control ◽  
Bp Neural Network ◽  
Structural Response ◽  
Magnetorheological Damper ◽  
Building Structure ◽  
Artificial Neural

Uncertainty for the building structure and nonlinear, this simulation of a multi-storey structure under earthquake is presented based on the BP neural network and system identification, controller will be built to effectively reduce the structural response, and to strengthen the unique damper performance.

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