Method and system for torque/force control of hydraulic...

Data processing: generic control systems or specific application – Generic control system – apparatus or process – Optimization or adaptive control

Reexamination Certificate

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Reexamination Certificate

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11289439

ABSTRACT:
A combined scheme of identification and torque control is provided for rotary hydraulic actuators. The composite controller consists of a dynamic feedback linearizing inner loop cascaded with a robust linear feedback outer loop. The proposed controller allows the actuator to generate desired torque irrespective of the actuator motion. In fact, the controller reduces significantly the impedance of the actuator as seen by its external load, making the system an ideal source of torque suitable for many robotics and automation applications. An identification method to extract the parameters of non-linear model of actuator dynamics and to estimate a bound for modeling uncertainty, used for synthesis of the outer optimal controller, is also presented. Results are illustrated experimentally on a pitch actuator of a Schilling industrial robot.

REFERENCES:
patent: 4647004 (1987-03-01), Bihlmaier
patent: 5209661 (1993-05-01), Hildreth et al.
patent: 5953977 (1999-09-01), Krishna et al.
patent: 6084371 (2000-07-01), Kress et al.
patent: 6212466 (2001-04-01), Ulyanov et al.
patent: 6904422 (2005-06-01), Calise et al.
patent: 6968241 (2005-11-01), Vonnoe et al.
patent: 7277764 (2007-10-01), Hovakimyan et al.
Laval et al., “H—Force Control of a Hydraulic Servo-Actuator with Environmental Uncertainties”,Proceedings of the 1996 IEEE International Conference on Robotics and Automation, pp. 1566-1571.
Sohl et al., “Experiments and Simulations on the Nonlinear Control of a Hydraulic Servosystem”,IEEE Transactions on Control Systems Technology, vol. 7, No. 2, Mar. 1999, pp. 238-247.
Vossoughi et al., Dynamic Feedback Linearization for Electrohydraulically Actuated Control Systems,Transactions of the ASME, vol. 117, 1995, pp. 468-477.
Habibi, “Design of a New High-Performance ElectroHydraulic Actuator”,IEEE/ASME Transactions on Mechatronics, vol. 5, No. 2, Jun. 2000, pp. 158-164.
Liu et al., “Nonlinear Force/Pressure Tracking of an Electro-Hydraulic Actuator”,14thTriennial World Congress, Beijing, P.R., China, pp. 469-474.

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