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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tar, J.K. Rudas, I.J. Szeghegyi, A. Kozlowski, K. |
| Copyright Year | 1963 |
| Abstract | Hydraulic differential electric servo cylinders are strongly nonlinear, coupled multivariable electromechanical tools applicable for driving, e.g., manipulators. Since they have considerable advantages in comparison with electric drives, it would be desirable to extend their application to dynamic continuous path (CP) control, too. From this point of view these systems have the following specialties: a) the most important phenomena influencing their behavior as, e.g., warming up of the sliding surfaces, are determined by local effects, and cannot be controlled globally; b) the friction forces show discontinuous variation at the zero transition of the piston's velocity that is a locally nonlinearizable nonlinearity. A common proportional, integral, and derivative (PID) controller may generate a noise-like acceleration signal due to feeding back the effects of such fluctuations. Warming up of the working fluid during operation influences these friction properties, too. Dynamic interaction between the system and its environment neither measured nor modeled by the controller is another agent influencing the system's observable behavior. For this purpose a special controller was elaborated. It implements certain adaptivity to compensate the effects of the inaccurate model and the unknown external disturbances, and also contains a nonconventional noise filtering technique to reduce the effect of the fluctuating friction forces. In the paper the control method is described, and then its capabilities are illustrated via simulation results. |
| Sponsorship | IEEE Instrumentation and Measurement Society Bureau international des poids et mesures IEEE International Bureau of Weights and Measures (BIPM) URSI NBS Agency Ind. Sci. & Technol., Min. Int. Trade & Ind. Sci. Council Japan International Union of Pure and Applied Physics (IUPAP) NIST NRCC National Conference of Standards Laboratories (NCSL) Allen Osborne Associates Andeen-Hagerling, Inc. Ballantine Lab. Inc. Clarke-Hess Communications Research Corp. Fluke Corporation Guildline Instruments Hewlett-Packard Co. Julie Res. Lab. Inc. Keithley Instruments, Inc. Measurements International Ltd. Canada QuadTech Inc. Quantum Design Inc. Rotek Instrum. Corp. Tegam Inc. Tektronix Inc |
| Starting Page | 2169 |
| Ending Page | 2176 |
| Page Count | 8 |
| File Size | 445434 |
| File Format | |
| ISSN | 00189456 |
| Volume Number | 54 |
| Issue Number | 6 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-12-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Signal processing Adaptive control Servomechanisms Friction Working environment noise Couplings Manipulator dynamics Force control Velocity control Nonlinear control systems nonlinear systems Acceleration control acceleration measurement adaptive control hydraulic equipment learning control systems modeling |
| Content Type | Text |
| Resource Type | Article |
| Subject | Instrumentation Electrical and Electronic Engineering |
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