Experimental study of model-based feedforward control of longitudinal wave transmission through hollow cylinders

2002 ◽  
Author(s):  
Ion Pelinescu ◽  
Balakumar Balachandran
Keyword(s):  
Experimental Study ◽  
Longitudinal Wave ◽  
Feedforward Control ◽  
Wave Transmission ◽  
Model Based ◽  
Hollow Cylinders

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.

Experimental Study of Wave Transmission

1974 ◽  
Vol 100 (4) ◽  
pp. 279-286
Author(s):  
Mohamed Sameh Nasser ◽  
John A. McCorquodale
Keyword(s):  
Experimental Study ◽  
Wave Transmission

A numerical and experimental study of a simple model-based predictive control strategy in a perimeter zone with phase change material

2018 ◽  
Vol 24 (9) ◽  
pp. 933-944 ◽  
Author(s):  
Anastasios C. Papachristou ◽  
Charalampos A. Vallianos ◽  
Vasken Dermardiros ◽  
Andreas K. Athienitis ◽  
JosÉ A. Candanedo
Keyword(s):  
Experimental Study ◽  
Simple Model ◽  
Phase Change ◽  
Phase Change Material ◽  
Predictive Control ◽  
Control Strategy ◽  
Model Based ◽  
Change Material

scholarly journals High-precision measurements of cementless acetabular components using model-based RSA: An experimental study

2007 ◽  
Vol 78 (4) ◽  
pp. 463-469 ◽  
Author(s):  
Thomas Baad-Hansen ◽  
Søren Kold ◽  
Bart L Kaptein ◽  
Kjeld Søballe
Keyword(s):  
Experimental Study ◽  
High Precision ◽  
Precision Measurements ◽  
Model Based ◽  
Acetabular Components

scholarly journals Experimental study on the influence of draft relative due to wave transmission energy coefficient on hanging sheet pile breakwater

2019 ◽  
Vol 619 ◽  
pp. 012031
Author(s):  
Chairul Paotonan ◽  
Sabaruddin Rahman ◽  
Hasdinar Umar ◽  
Taufiqur Rachman ◽  
Achmad Yasir Baeda ◽  
...  
Keyword(s):  
Experimental Study ◽  
Wave Transmission ◽  
Sheet Pile ◽  
Energy Coefficient ◽  
Transmission Energy
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