PI Control of HSFDs for Active Control of Rotor-Bearing Systems

Hathout, J. P.; El-Shafei, A.

doi:10.1115/1.2817035

Cited by 9 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where K0 is a fixed proportional gain. Hathout and El-Shafei (1997) used the form (5). The other two forms were proposed so that the effective proportional gain is not entirely dependent on the adaptation parameter G. This is a usual approach to avoid vast changes by the adaptation mechanism which might cause instability.…”

Section: Implementation and Experimental Resultsmentioning

confidence: 99%

“…1999 " . I Bil (Hathout and El-Shafei, 1997). Also Hathout et at (1997) investigated the on-off control of multi-mode rotors supported on HSFDs.…”

Section: Presented At the International Gas Turbine And Aeroengine Congmentioning

confidence: 99%

“…In fact, one can construct a particular second order model for each mode and the response of the system is the summation of the responses of the second order systems of all modes. Hathout and El-Shafei (1997) used the full nonlinear model of the rotor system as the reference model. This is not the usual case in choosing the reference model.…”

Section: The Reference Modelmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors

El-Shafei

El-Hakim

1999

Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

Self Cite

View full text Add to dashboard Cite

This paper describes the experimental application of adaptive control to Hybrid Squeeze Film Damper (HSFD) supported rotors. The HSFD has been shown to be an adaptive damper capable of providing infinite damper configurations between short and long damper configurations. Previously, theoretical investigations of the adaptive control of HSFD concentrated on the development of the model reference adaptive control (MRAC) method, as well as development of a nonlinear reference model. Simulations of the performance of the adaptive controller during run-up and coast-down indicated the superior performance of the adaptive controller. In this paper, the adaptive controller is tested on a multi-mode rotor. A test rig is designed and developed using computer control. A simple reference model is investigated consisting of a second order system. Three forms for adaptation gain are studied. The results of the experimental investigation illustrated the performance capabilities of the adaptive controller applied to the HSFD, and moreover indicated the possibility of simple design for the adaptive controller.

show abstract

Section: Implementation and Experimental Resultsmentioning

confidence: 99%

“…1999 " . I Bil (Hathout and El-Shafei, 1997). Also Hathout et at (1997) investigated the on-off control of multi-mode rotors supported on HSFDs.…”

Section: Presented At the International Gas Turbine And Aeroengine Congmentioning

confidence: 99%

Section: The Reference Modelmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors

El-Shafei

El-Hakim

1999

Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hathout and El-Shafei (Hathout and El-Shafei, 1997) proposed a hybrid squeeze film damper (HSFD), (see Figure 4.b), to attenuate the vibrations in rotating machinery for both sudden unbalance and transient run-up through critical speeds. El-Shafei (El-Shafei, 2000) have implemented different control algorithms (PID-type controllers, LQR, gain scheduling, adaptive and bang-bang controllers) for active control of rotor vibrations for HSFDsupported rotors.…”

Section: Active Balancing and Vibration Control Of Rotating Machinerymentioning

confidence: 99%

Automatic Balancing of Rotor-Bearing Systems

Ortega¹,

Silva-Navarro²,

Colín³

et al. 2012

Advances on Analysis and Control of Vibrations - Theory and Applications

View full text Add to dashboard Cite

Simply structured controllers for vibration suppression in long rotors

Aleyaasin

2021

Int. J. Dynam. Control

View full text Add to dashboard Cite

In this paper suppression of the transient flexural vibrational disturbances in long rotors, with fluid film bearings, is investigated. The rotor is described by a series of distributed shafts connected by the lumped discs, and the system is mounted on lumped fluid film bearings. Upon determination of the dynamic stiffness matrix of the system, the best approximate transfer function matrix description of the rotor, is determined. Initially vibration suppression by simple diagonal Proportional + Integral (PI) controllers is studied and via direct search optimisation techniques the PI parameters which exhibit fast vibration suppression is found. The resulted high integration rate, and low proportional gain PI controller, theoretically provided fast suppression time. However, it is shown that due to the strong coupling effect in the rotor system, and high rate of integration, the closed loop relative stability is weak, and feasibility of controller is questionable. Therefore, an alternative simple first order controller without integration action, that is named “attenuation filter “is suggested that can produce stronger stability and produces significant (not full) vibration suppression. The closed loop multivariable control of the rotor system comprising two vibration sensors and two magnetic actuators using such attenuation filter, is then simulated. The response to step disturbances, has provided 95% suppression with significantly fast response. It is concluded that although the attenuation filter may not provide 100% suppression, but it more reliable since the integration of the error, that results weak stability is avoided.

show abstract

PI Control of HSFDs for Active Control of Rotor-Bearing Systems

Cited by 9 publications

References 10 publications

Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors

Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors

Automatic Balancing of Rotor-Bearing Systems

Simply structured controllers for vibration suppression in long rotors

Contact Info

Product

Resources

About