Saturated Feedback Control Using Different Higher-Order Sliding-Mode Algorithms

2020 ◽  
pp. 125-148
Author(s):  
Mohammad Ali Golkani ◽  
Stefan Koch ◽  
Markus Reichhartinger ◽  
Martin Horn ◽  
Leonid Fridman
Keyword(s):  
Feedback Control ◽  
Sliding Mode ◽  
Higher Order

Throttling of Liquid Rockets using Higher Order Sliding Mode Control

2014 ◽  
Author(s):  
Christian H. Tournes ◽  
Pablo A. Reimonte ◽  
Yuri Shtessel
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Higher Order ◽  
Mode Control

Higher Order Sliding Mode Observer-Based Control

2004 ◽  
Vol 37 (21) ◽  
pp. 481-486 ◽  
Author(s):  
R. Castro-Linares ◽  
A. Glumineau ◽  
S. Laghrouche ◽  
F. Plestan
Keyword(s):  
Sliding Mode ◽  
Higher Order ◽  
Sliding Mode Observer

scholarly journals Model-Based Design Approach to Improve Performance Characteristics of Hydrostatic Bearing Using Multivariable Optimization

Mathematics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 388
Author(s):  
Waheed Ur Rehman ◽  
Xinhua Wang ◽  
Yiqi Cheng ◽  
Yingchun Chen ◽  
Hasan Shahzad ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Feedback Control ◽  
External Load ◽  
Sliding Mode ◽  
Feedforward Control ◽  
Spindle Speed ◽  
Performance Criteria ◽  
Model Based ◽  
Hydrostatic Bearings ◽  
Robust Control Design

Research in the field of tribo-mechatronics has been gaining popularity in recent decades. The objective of the current research is to improve static/dynamics characteristics of hydrostatic bearings. Hydrostatic bearings always work in harsh environmental conditions that effect their performance, and which may even result in their failure. The current research proposes a mathematical model-based system for hydrostatic bearings that helps to improve its static/dynamic characteristics under varying conditions of performance-influencing variables such as temperature, spindle speed, external load, and clearance gap. To achieve these objectives, the capillary restrictors are replaced with servo valves, and a mathematical model is developed along with robust control design systems. The control system consists of feedforward and feedback control techniques that have not been applied before for hydrostatic bearings in the published literature. The feedforward control tries to remove a disturbance before it enters the system while feedback control achieves the objective of disturbance rejection and improves steady-state characteristics. The feedforward control is a trajectory-based controller and the feedback controller is a sliding mode controller with a PID sliding surface. The particle swarm optimization algorithm is used to tune the 6-dimensional vector of the tuning parameters with multi-objective performance criteria. Numerical investigations have been carried out to check the performance of the proposed system under varying conditions of viscosity, clearance gap, external load and the spindle speed. The comparison of our results with the published literature shows the effectiveness of the proposed system.

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