scholarly journals LOFT pump speed controller stability and accuracy analysis

1978 ◽  
Author(s):  
R.R. Good
Keyword(s):  
Accuracy Analysis ◽  
Pump Speed ◽  
Speed Controller ◽  
Stability And Accuracy

scholarly journals Stability and Accuracy Analysis of Power Hardware-in-the-loop Simulation of Inductor Coupled Systems

2010 ◽  
Vol 130 (7) ◽  
pp. 902-912 ◽  
Author(s):  
Miao Hong ◽  
Yushi Miura ◽  
Toshifumi Ise ◽  
Yuki Sato ◽  
Toshinari Momose ◽  
...  
Keyword(s):  
Coupled Systems ◽  
Accuracy Analysis ◽  
Hardware In The Loop ◽  
Stability And Accuracy

Performance of a Pump Controlled Asymmetric Actuator: A Comparison of Different Control Methods

2014 ◽  
Author(s):  
Sami Kukkonen ◽  
Esa Mäkinen
Keyword(s):  
System Performance ◽  
Dynamic Pressure ◽  
Pole Placement ◽  
Linear Actuator ◽  
Control Methods ◽  
Displacement Control ◽  
Pump Speed ◽  
Speed Controller ◽  
Pressure Feedback ◽  
Inertial Loading

This paper discusses different stabilizing pump control methods to improve and optimize the damping of a pump controlled asymmetric linear actuator response. The main purpose of the paper has been to study the redeeming features and drawbacks of influencing the actuator response by pump control without direct position, velocity or pressure feedback from the actuator. To the author’s knowledge, this type of stabilizing method is novel to pump controlled hydraulic drives. Pole placement techniques with both pump speed and displacement control are discussed and finally the system performance is compared by simulation with a system where dynamic pressure feedback has been used. Preliminary optimal tuning rules for the pump speed controller and pump volumetric displacement value have been derived and their applicability to high, varying inertial loading application has been assessed. Results indicate clear improvements of the actuator response damping level with the suggested rules but also raise the demands for pump torque and displacement range.

Fault Diagnosis of a Centrifugal Pump by Vibration Analysis

Volume 3 ◽  
2004 ◽  
Author(s):  
M. Behzad ◽  
A. R. Bastami ◽  
M. Maassoumian
Keyword(s):  
Centrifugal Pump ◽  
Vibration Analysis ◽  
Vibration Measurement ◽  
Two Phase ◽  
Pump Design ◽  
Pump Speed ◽  
Speed Controller ◽  
Performance Curves ◽  
Electrical Faults ◽  
Dissolved Air

This paper gives the final Solution for vibration reduction in a centrifugal pump. Vibration measurement in different conditions has been carried out in order to find the main reason for excessive vibration of the pumps. In the first stage several parameters including cavitation, not working in the pump design condition and mechanical and electrical faults assumed to be the reason for the pump vibration. By vibration analysis it is found that the major reason for the pump vibration is working in off design conditions. More over dissolved air in the suction fluid can possibly cause two-phase flow leading to the pump vibration. For solving both problems considering pump performance curves it has been suggested to use a speed controller to reduce pump speed.

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