Sliding mode control for urban railway anti-slip system based on optimal slip ratio estimation with forgetting factor recursive least-squares

2017 ◽  
Author(s):  
Zhiwu Huang ◽  
Zheng Xu ◽  
Bin Chen ◽  
Rui Zhang ◽  
Yuanjun Chen ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Slip System ◽  
Least Squares ◽  
Sliding Mode ◽  
Recursive Least Squares ◽  
Ratio Estimation ◽  
Forgetting Factor ◽  
Slip Ratio ◽  
Mode Control ◽  
Optimal Slip Ratio

Recursive Least Squares and Sliding Mode Control for Voltage Compensation of Three-Phase Loads

2018 ◽  
Vol 29 (6) ◽  
pp. 769-777
Author(s):  
Alfeu J. Sguarezi Filho ◽  
Darlan A. Fernandes ◽  
José H. Suárez ◽  
Fabiano F. Costa ◽  
José A. T. Altuna
Keyword(s):  
Sliding Mode Control ◽  
Least Squares ◽  
Sliding Mode ◽  
Recursive Least Squares ◽  
Mode Control ◽  
Three Phase ◽  
Voltage Compensation

Emergency Avoidance Control System for an Automatic Vehicle – Slip Ratio Control Using Sliding Mode Control and Real-Number-Coded Immune Algorithm –

2015 ◽  
Vol 27 (6) ◽  
pp. 645-652 ◽  
Author(s):  
Masafumi Hamaguchi ◽  
◽  
Takao Taniguchi
Keyword(s):  
Sliding Mode Control ◽  
Real Number ◽  
Degrees Of Freedom ◽  
Sliding Mode ◽  
Linear Interpolation ◽  
Immune Algorithm ◽  
Transport Systems ◽  
Slip Ratio ◽  
Mode Control ◽  
Data Points

<div class=""abs_img""><img src=""[disp_template_path]/JRM/abst-image/00270006/06.jpg"" width=""300"" /> Vehicle behavior in emergency avoidance</div>The automotive industry facilitates research and development on intelligent transport systems. One area researched intensively to enhance passenger safety is the prevention of collisions by controlling steering and braking precisely. In this study, we assume that an automatic vehicle travelling on a highway is on a collision course with an obstacle. The purpose of this research is combining steering and braking to find a set of operations the vehicle can follow to avoid the projected collision. To do this, we propose slip ratio control using sliding mode control using a real-number-coded immune algorithm (IA). CarSim (produced by Mechanical Simulation Company) provides full vehicle dynamics with 27 degrees of freedom adopted as a vehicle model. Operation waveforms are generated by linear interpolation through designated data points. The IA, which is a coded real-number expression, is used to determine data points. Our proposal's efficiency is verified through emergency avoidance simulation using CarSim. Simulation results demonstrate operation that keeps tires from skidding using slip ratio control and halting the vehicle in the shortest braking distance possible.

scholarly journals Backstepping Fuzzy Sliding Mode Control for the Antiskid Braking System of Unmanned Aerial Vehicles

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1731
Author(s):  
Xi Zhang ◽  
Hui Lin
Keyword(s):  
Sliding Mode Control ◽  
Unmanned Aerial Vehicles ◽  
Control Strategy ◽  
Sliding Mode ◽  
Pressure Control ◽  
Slip Ratio ◽  
Fuzzy Sliding Mode Control ◽  
Braking System ◽  
Mode Control ◽  
Fuzzy Sliding Mode

This paper proposes a backstepping fuzzy sliding mode control method for the antiskid braking system (ABS) of unmanned aerial vehicles (UAVs). First, the longitudinal dynamic model of the UAV braking system is established and combined with the model of the electromechanical actuator (EMA), based on reasonable simplification. Subsequently, to overcome the higher-order nonlinearity of the braking system and ensure the lateral stability of the UAV during the braking process, an ABS controller is designed using the barrier Lyapunov function to ensure that the slip ratio can track the reference value without exceeding the preset range. Then, a power fast terminal sliding mode control algorithm is adopted to realize high-performance braking pressure control, which is required in the ABS controller, and a fuzzy corrector is established to improve the dynamic adaptation of the EMA controller in different braking pressure ranges. The experimental results show that the proposed braking pressure control strategy can improve the servo performance of the EMA, and the hardware in loop (HIL) experimental results indicate that the proposed slip ratio control strategy demonstrates a satisfactory performance in terms of stability under various runway conditions.

Constant Turning Force Adaptive Control Via Sliding Mode Control Design

1990 ◽  
Vol 112 (2) ◽  
pp. 308-312 ◽  
Author(s):  
Chih-Lyang Hwang ◽  
Bor-Sen Chen
Keyword(s):  
Adaptive Control ◽  
Sliding Mode Control ◽  
Sliding Mode ◽  
Open Loop ◽  
Forgetting Factor ◽  
Mode Control ◽  
Variable Forgetting Factor ◽  
The Stability ◽  
Turning System ◽  
Time Form

In the constant turning force adaptive control (CTFAC) system, the open-loop gain will vary and the stability cannot be assured when a cutting tool cuts a workpiece at various cutting depths or spindle operates in different speeds. In this paper, the spirit of sliding mode control is extended into discrete-time form to combine with parameter estimation having variable forgetting factor to stabilize the turning system against the variable gain and unmodeled dynamics, such as nonlinear perturbations, inaccurate measurements etc.

The Sliding Mode Control for Traction Control System Based on Variable Optimal Slip Ratio

2013 ◽  
Vol 380-384 ◽  
pp. 485-490
Author(s):  
Jian Zhao ◽  
Jin Zhang ◽  
Bing Zhu
Keyword(s):  
Control System ◽  
Sliding Mode Control ◽  
Control Method ◽  
Sliding Mode ◽  
Road Surface ◽  
Information Measurement ◽  
Slip Ratio ◽  
Traction Control ◽  
Traction Control System ◽  
Mode Control

In this paper, the concept of intelligent tire and road surface information measurement methods are introduced, and the sliding mode algorithm for traction control system based on intelligent tire is proposed. By applying braking torque onto the driving wheels, the slip rates are adjusted to maintain within the optimal region on different road surface, and the optimal longitudinal traction is achieved. According to the simulation results on the CARSIM and MATLAB co-simulation platform of several working conditions, the TCS based on sliding mode control method improves the traction performance on different road surface effectively.

Sign in / Sign up

Export Citation Format

Share Document