Browsing by Subject "nonlinear control"

Now showing 1 - 3 of 3

Access status: Open Access ,
Control system of the hydraulic cylinders motion synchronization with the controllers designed on the basis of the direct Lapunov's method
(Wydawnictwa AGH, 2009) Grzybek, Dariusz
The following article deals with the subject of control of the hydraulic cylinders motion synchronization. The subject of the paper is the analysis of throttling-controlled motion synchronization system in the range of potential control algorithms. The main aim was to elaboration and research of the control system of n (where n = 2) hydraulic valves with a view to ensuring the highest possible efficiency of cylinders motion synchronization. The elaborated control system enables effective motion synchronization of n hydraulic cylinders with a view to ensuring a system stability. In the suggested control system controllers designed on the basis of the direct Lapunov's method were used. The number of control systems is equal to the number of the synchronized cylinders.
Access status: Open Access ,
Feed-forward compensation for nonlinearity of vibrating plate as the sound source for active noise control
(2011) Mazur, Krzysztof; Pawełczyk, Marek
Active Noise Control (ANC) systems are usually designed in the feed-forward structure with adaptive linear control filters. However, performance of such systems, when a vibrating plate is used as the secondary source, may be poor due to significant non-linearity of the plate response. The linear systems are then unable to cope with higher harmonics generated by the nonlinearity. One solution to this problem is to apply a nonlinear ANC algorithm. However, it adds additional complexity to this layer. It is particularly severe for multichannel systems, where the algorithms are complex by themselves, and making them nonlinear may significantly reduce their scalability. In this paper, another approach is proposed. Multiple actuators are mounted on a single plate, in order to effectively excite more vibration modes and generate a higher acoustic power, than in case of a single actuator. The response of the vibrating plate as the sound source is then linearized with a set of nonlinear finite impulse response filters, operating individually for each actuator. The Filtered-x LMS algorithm is adopted to update parameters of the nonlinear filters. The control system is experimentally verified and obtained results are reported.
Access status: Restricted ,
Zastosowanie bezprzewodowego mikromodułu BLE w sterowaniu
(Data obrony: 2017-10-18) Gielniewski, Adrian
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej