A Multiple Sliding Surface based control for Active Seat Suspension System

2021 ◽  
Author(s):  
Ashwyn More ◽  
Amruta Deshpande
Keyword(s):  
Suspension System ◽  
Sliding Surface ◽  
Seat Suspension

scholarly journals An Energy Saving Variable Damping Seat Suspension System With Regeneration Capability

2018 ◽  
Vol 65 (10) ◽  
pp. 8080-8091 ◽  
Author(s):  
Donghong Ning ◽  
Haiping Du ◽  
Shuaishuai Sun ◽  
Wenfei Li ◽  
Weihua Li
Keyword(s):  
Energy Saving ◽  
Suspension System ◽  
Seat Suspension ◽  
Variable Damping ◽  
Regeneration Capability

Optimization of the Damping Seat’s Body Structure Based on the Task Space

2014 ◽  
Vol 1055 ◽  
pp. 143-146
Author(s):  
Hai Xian Zhao
Keyword(s):  
Natural Frequency ◽  
Suspension System ◽  
Vehicle Body ◽  
Optimized Design ◽  
Body Structure ◽  
Dimensional Problem ◽  
Task Space ◽  
System Research ◽  
Frequency Range ◽  
Seat Suspension

This paper is contrary to the seat multi-dimensional problem basing on task space. Using double triangle steward parallel mechanism as the main structure of the seat suspension, according to the sensitive frequency range and the natural frequency of vehicle body, we optimize the design of the suspension system. Research shows that the optimized design of the double triangle Stewart parallel suspension seat suspension system to ensure vertical, pitch, roll three of the more important natural frequency both directions away from the vehicle's natural frequency, but also avoid the human body sensitive frequency range.

Robust Control of Automotive Active Seat-Suspension System Subject to Actuator Saturation

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Zhou Gu ◽  
Shumin Fei ◽  
Yaqin Zhao ◽  
Engang Tian
Keyword(s):  
Controller Design ◽  
Actuator Saturation ◽  
Input Saturation ◽  
Output Feedback Control ◽  
Suspension System ◽  
Linear Matrix ◽  
Control Input ◽  
State Variables ◽  
Sampled Data ◽  
Seat Suspension

This paper deals with the problem of robust sampled-data control for an automotive seat-suspension system subject to control input saturation. By using the nature of the sector nonlinearity, a sampled-data based control input saturation in the control design is studied. A passenger dynamic behavior is considered in the modeling of seat-suspension system, which makes the model more precisely and brings about uncertainties as well in the developed model. Robust output feedback control strategy is adopted since some state variables, such as, body acceleration and body deflection, are unavailable. The desired controller can be achieved by solving the corresponding linear matrix inequalities (LMIs). Finally, a design example has been given to demonstrate the effectiveness and advantages of the proposed controller design approach.

scholarly journals Effect of delayed resonator on the vibration reduction performance of vehicle active seat suspension

2021 ◽  
pp. 146134842110464
Author(s):  
Yongguo Zhang ◽  
Chuanbo Ren ◽  
Kehui Ma ◽  
Zhen Xu ◽  
Pengcheng Zhou ◽  
...  
Keyword(s):  
Time Delay ◽  
Vibration Reduction ◽  
Suspension System ◽  
Vibration Response ◽  
Vibration Absorber ◽  
Dynamic Vibration Absorber ◽  
Precise Integration ◽  
Seat Suspension ◽  
Dynamic Vibration ◽  
Seat Vibration

The combination of dynamic vibration absorber and partial state feedback with time-delay is called delayed resonator. In order to suppress the seat vibration caused by uneven road surface and improve ride comfort, the delayed resonator is applied to the seat suspension to realize active control of the seat suspension system. The dynamic model of the half-vehicle suspension system is established, and the time-delay differential equation of the system under external excitation is solved by the precise integration method. The root mean square of the time-domain vibration response of seat displacement, seat acceleration and vehicle acceleration are selected as the objective function. Then, the optimal time-delay control parameters are obtained by particle swarm optimization algorithm. The frequency sweeping method is used to obtain the critical time-delay value and time-delay stable interval of the system. Finally, an active seat suspension model with delayed resonator is established for numerical simulation. The results show that the delayed resonator can greatly suppress the seat vibration response regardless of the road simple harmonic excitation or random excitation. Compared with dynamic vibration absorber, it has a better vibration absorption effect and a wider vibration reduction frequency band.

scholarly journals Robustness control for nonlinear systems based on homogeneous prescribed sliding mode control

2021 ◽  
Vol 4 (2) ◽  
pp. 1019-1035
Author(s):  
PHU XUAN DO ◽  
HUNG QUOC NGUYEN
Keyword(s):  
Energy Consumption ◽  
Sliding Mode Control ◽  
Sliding Mode ◽  
Control Function ◽  
Linear Matrix ◽  
Sliding Surface ◽  
Seat Suspension ◽  
Mode Control ◽  
Input Control ◽  
Severe Disturbance

This paper presents a new homogeneous control using dual sliding mode control, and robustness control using linear matrix inequality (LMI) constraints. The controller is applied for the severe disturbance. A sliding surface function, which relates to an exponential function and itself t-norm, is applied to save the energy consumption of the control system. The constraints related LMI are proposed with the matrices and vectors of the systems following the chosen matrices in control the energy for control. Solution of the constraints is also presented with new approach to save the time of calculation. In addition, the proof for the proposed controller is also presented by using the candidate Lyapunov function. In the input control function, the t-norm type is embedded to improve its performance in control disturbance. Besides of the t-norm, the modified sliding surface in the input control is also improve the energy for controlling. The combination of these robustness control elements would bring a new view for the design of control. The advantages of the controller are demonstrated via computer simulation for a seat suspension system. A magneto-rheological fluid seat suspension with its random disturbances is used. To prove the flexibility of the controller, the proposed approach is compared with an existing controller. The compared control has the same structure as shown in the proposed model. However, its design has a disadvantage in control the severe disturbance. The comparison between two controls is a clear view of distinct improvement. The results of simulations show that the controller provides better performance and stability of the system. The stability is also analyzed through the variation of the input control and power spectral density related energy consumption.

An Active Seat Suspension System for Off-Road Vehicles

1970 ◽  
Vol 13 (1) ◽  
pp. 0099-0106 ◽  
Author(s):  
L. F. Stikeleather and C. W. Suggs
Keyword(s):  
Suspension System ◽  
Road Vehicles ◽  
Seat Suspension

Evaluation of vehicles’ active seat suspension system using wavelet analysis

2020 ◽  
Vol 51 (10) ◽  
pp. 176-185
Author(s):  
Andrzej Błażejewski ◽  
Sebastian Głowiński
Keyword(s):  
Transfer Function ◽  
Wavelet Analysis ◽  
Human Body ◽  
Human Head ◽  
Suspension System ◽  
Test Stand ◽  
Seat Suspension ◽  
System Output ◽  
Vehicle Seat

In this work, the dedicated test stand was applied to investigate the human body–vehicle seat system. The particular signals were measured by accelerometers placed on the seat and the human head. The horizontal vibrations were applied as the input to the system. As an alternative to the classical Fourier approach, the wavelet transfer function was introduced to describe the effectiveness of particular seat suspension. The human head reaction was investigated as the system output.

scholarly journals An active seat suspension design for vibration control of heavy-duty vehicles

2016 ◽  
Vol 35 (4) ◽  
pp. 264-278 ◽  
Author(s):  
Donghong Ning ◽  
Shuaishuai Sun ◽  
Jiawei Zhang ◽  
Haiping Du ◽  
Weihua Li ◽  
...  
Keyword(s):  
Ride Comfort ◽  
Cost Effective ◽  
Basic Structure ◽  
Suspension System ◽  
Heavy Duty ◽  
Linear Motors ◽  
Seat Suspension ◽  
Output Torque ◽  
Hydraulic Cylinders ◽  
Heavy Duty Vehicles

This paper presents the design, fabrication and testing of an innovative active seat suspension system for heavy-duty vehicles. Rather than using conventional linear actuators, such as hydraulic cylinders or linear motors, which need to be well maintained and are always expensive when high force outputs are required, the proposed seat suspension system directly applies a rotary motor in order to provide the required active actuation, without changing the basic structure of the existing off-the-shelf seat suspension. A gear reducer is also applied to amplify the output torque of the motor so that a high output torque can be achieved using a low rated power motor. A static output feedback [Formula: see text] controller with friction compensation is designed to actively reduce seat vibration. Experiments are carried out to test the fabricated suspension prototype. The experimental results show that this type of seat suspension can achieve greater ride comfort in the frequency range of 2–6 Hz than a passive seat suspension. The newly designed active seat suspension is much more cost effective and can be suitable for heavy-duty vehicles.

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