This paper describes the design methodology of a reduced order observer and digital controller for a multivariable inherently unstable electro-hydraulic system. The paper describes the experimental techniques used to identify the parameters of the system using the Signal Processing Toolbox within Matlab, and shows the use of Matlab's Control System Toolbox to design the observer and the feedback gains. The significance of signal saturation is illustrated and the means to avoid such problems in the controller are explained.
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References
1.
WardmanD.RoddisR., ‘Design of an electrohydraulic multivariable control system teaching facility’, Proceedings of UKACC Conference on Control '96, IEE, 1996.
2.
Matlab Signal Processing Toolbox User's Guide, The Math Works Inc., 1994.
3.
Matlab Control System Toolbox User's Guide, The Math Works Inc., 1994.
4.
FranklinG. F.PowellJ. D.Emami-NaeiniA., Feedback Control of Dynamic Systems, Addison-Wesley, 1994.
