| Journal: | Journal of the Brazilian Society of Mechanical Sciences |
| Database: | PERIÓDICA |
| System number: | 000312137 |
| ISSN: | 0100-7386 |
| Authors: | Pinto, O.C1 Goncalves, P.B2 |
| Institutions: | 1Fundacao Universidade Federal do Rio Grande, Escola Tecnica, Rio Grande, Rio Grande do Sul. Brasil 2Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Engenharia Civil, Rio de Janeiro. Brasil |
| Year: | 2002 |
| Season: | May |
| Volumen: | 24 |
| Number: | 2 |
| Pages: | 99-104 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | This paper studies the effect of time delay on the active non-linear control of dynamically loaded flexible structures. The behavior of non-linear systems under state feedback control, considering a fixed time delay for the control force, is investigated. A control method based on non-linear optimal control, using a tensorial formulation and state feedback control is used. The state equations and the control forces are expressed in polynomial form and a performance index, quadratic in both state vector and control forces, is used. General polynomial representations of the non-linear control law are obtained and implemented for control algorithms up to the fifth order. This methodology is applied to systems with quadratic and cubic non-linearities. Strongly non-linear systems are tested and the effectiveness of the control system including a delay for the application of control forces is discussed. Numerical results indicate that the adopted control algorithm can be efficient for non-linear systems, chiefly in the presence of strong non-linearities but increasing time delay reduces the efficiency of the control system. Numerical results emphasize the importance of considering time delay in the project of active structural control systems |
| Disciplines: | Ingeniería |
| Keyword: | Ingeniería de control, Ingeniería mecánica, Control no lineal, Tiempo, Delay, Sistemas de control, Control óptimo |
| Keyword: | Engineering, Control engineering, Mechanical engineering, Nonlinear control, Time, Delay, Control systems, Optimal control |
| Full text: | Texto completo (Ver HTML) |
