Traversing hoists – Having means to prevent or dampen load oscillations – Antisway
Patent
1996-01-26
1999-10-05
Brahan, Thomas J.
Traversing hoists
Having means to prevent or dampen load oscillations
Antisway
212270, B66C 1306
Patent
active
059609699
ABSTRACT:
A method and device for damping the oscillation of a load suspended from a rope on a crane is presented. A digital filter accepts an arbitrary velocity input signal and produces a velocity signal output similar to the input and that runs a bridge or trolley drive while damping the load's swing. One version of the damping filter may be implemented by programming a microprocessor to output a simple average of the input signal and the input signal delayed by one-half period of the pendulum motion of the load. A second version of the invention averages the input signals over the period of the pendulum motion to producing a damping signal. A third version of the invention averages the input signal with two delayed versions of the input signal. The third version will produce motion that will dampen load swing for a large range of rope lengths. Furthermore, if an additional signal representing rope length is taken, all three versions can be adapted to dampen swing for a full range of rope lengths.
REFERENCES:
patent: 5529193 (1996-06-01), Hytonen
patent: 5610848 (1997-03-01), Fowell
patent: 5638267 (1997-06-01), Singhose et al.
Aspinwall, D. M., "Acceleration Profiles for Minimizing Residual Response", Journal of Dynamic Systems, Measurement and Control, Mar. 1980, vol. 102/3, 4 pages.
Auernig et al., "Time Optimal Control of Overhead Cranes with Hoisting of the Load", Automatica, vol. 23, No. 4, pp. 437-447, 1987.
Butler et al., "Model Reference Adaptive Control of Gantry Crane Scale Model", IEEE Jan. 1991, pp. 57-62.
Cook, Gerald "Control of Flexible Structures Via Posicast", Dept. of Electrical & Computer Engineering, George Mason University, pp. 31-35 (prior art).
Cook, Gerald "An Application of Half-Cycle Posicast", IEEE Transactions on Automatic Control, Jul. 1966, pp. 556-559.
Cook, Gerald "Posicast Versus Conventional Types of Compensation in a Control System", B.S., Virginia Polytechnic Institute, 1961, 51 pages.
Crain et al., "Evaluation of Input Shaping on Configuration Dependent Systems", vol. 1, ASME Jul. 1996, pp. 315-318.
Dodds et al., "A signed switching time bang--bang attitude control law for fine pointing of flexible spacecraft", Int. J. Control, 1984, vol. 40, No. 4, pp. 795-811.
Dodds et al., "A Dynamics Parameter Invariant Attitude Control System for Flexible Spacecraft", International Conference of Dynamics of Flexible Structures in Space, May 15-18, 1990, pp. 157-181.
Erickson, Bert K., "Input Attenuation Functions Improve Servomechanism Performance", IEEE Transactions on Industrial Electronics and Control Instrumentation, vol. IECI-18, No. 4, Nov. 1971, pp. 144-156.
Fairfield, R. L., "Designing a Deadbeat Compensating Network", Control Engineering, Aug. 1966, pp. 75-77.
Farrenkopf, "Optimal Open-Loop Maneuver Profiles for Flexible Spacecraft", J. Guidance and Control, vol. 2, No. 6, Article No. 78-128OR, Nov.-Dec. 1979, pp. 491-498.
Ford et al., "The Application of Short-Time Memory Devices to Compensator Design", AIEE Winter General Meeting, Jan. 18-22, 1954, pp. 88-93.
Gimpel, et al., "Signal Component Control", AIEE Summer General Meeting Jun. 23-27, 1952, pp. 339-343.
Gorbatenko, George G., "Posicast Control by Delayed Gain", Control Engineering, Feb. 1965, 4 pages.
Gupta, Narendra K. "Frequency-Shaped Cost Functionals: Extension of Linear-Quadratic-Gaussian Design Methods", American Institute of Aeronautics and Astronautics, Inc., 1980, 7 pages.
Horng et al., "Digital Posicast Technique to Second Order Control Systems", Journal of the Chinese Society of Mechanical Engineers, vol. 6, No. 2, pp. 103-106, 1985.
Hyde et al., "Contact Transition Control: An Experimental Study", 1993 IEEE, pp. 363-368.
Hyde et al., "Inhibiting Multiple Mode Vibration in Controlled Flexible Systems", Proceedings of the 1991 American Control Conference, pp. 2449-2454.
Hyde et al., "Controlling Contact Transition", 1993 IEEE, Feb. 1994, pp. 25-30.
Hyde et al., "Using Input Command Pre-Shaping to Suppress Multiple Mode Vibration", Proceedings of the 1991 IEEE International Conference on Robotics and Automation, Apr. 1991, pp. 2604-2609.
Jones et al., "Control Input Shaping for Coordinate Measuring Machines", American Control Conference 1994, pp. 2899-2903.
Jones et al., "Swing Damped Movement of Suspended Objects", Sandia Report, Sep. 1990, pp. i-ii and 1-34.
Jones et al., "Oscillation Damped Movement of Suspended Objects", 1988 IEEE Bulletin, pp. 956-962.
Juang et al., "Closed-Form Solutions for Feedback Control with Terminal Constraints", Guidance, American Institute of Aeronautics and Astronautics, Inc. vol. 8, No. 1, Jan.-Feb. 1985, pp. 39-41.
Kallmann, Heinz E., "Transversal Filters", Proceedings of the I.R.E. Jul. 1940, pp. 302-310.
Kim et al., "Control of Induction Motors for Both high Dynamic Performance and High Power Efficiency", IEEE Transactions On Industrial Electronics, vol. 39, No. 4, Aug. 1992, pp. 323-333.
Kreisselmeier et al., "Application of Vector Performance Optimization to a Robust Control Loop Design for a Fighter Aircraft", 1980, pp. 1-69.
Kress et al., "Experimental Implementation of a Robust Damped-Oscillation Control Algorithm On a Full-Sized, Two-Degree-Of-Freedom, AC Induction Motor-Driven Crane", 3 pages, published Aug. 1994.
Kress et al., "Experimental Implementation of a Robust Damped-Oscillation Control Algorithm On a Full-Sized, Two-Degree-Of-Freedom, AC Induction Motor-Driven Crane", 8 pages, published Aug. 1994.
Magee et al., "The Application of Input Shaping To A System With Varying Parameters", Japan/USA Symposium on Flexible Automation-vol. 1, ASME 1992, pp. 519-526.
Magee et al., "Eliminating Multiple Modes of Vibration in a Flexible Manipulator", 1993 IEEE, pp. 474-479.
Magee et al., "Filtering Schilling Manipulator Commands to Prevent Flexible Structure Vibration", Proceedings of the American Control Conference, Jun. 1994, pp. 2538-2542.
Magee et al., "Implementing Modified Command Filtering to Eliminate Multiple Modes of Vibration", Proceedings of the American Control Conference, Jun. 1993, pp. 2700-2704.
Marttinen et al., "Modelling and analysis of a trolley crane", Proceedings of the Intern. AMSE Conference "Modelling & Simulation", Pomona, California, Dec. 16-18, 1987, vol. 3, pp. 15-26.
Marttinen, Arto "Pole-Placement Control of a Pilot Gantry", 3 pages, 1989.
Meckl et al., "Feedforward Control Techniques to Achieve Fast Settling Time in Robots", pp. 1913-1918, 1986.
Meckl et al., "Minimizing Residual Vibration for Point-to-Point Motion", Transactions of the ASME, vol. 107, Oct. 1985, pp. 378-382.
Meckl et al., "Reducing Residual Vibration In Systems With Time-Varying Resonances", 1987 IEEE, pp. 1690-1695.
Mee, D. H., "A Feedback Implementation of Posicast Control Using Sampling Circuits", Proceedings of the IREE, Jan./Feb. 1974, pp. 11-15.
Moustafa et al., "Nonlinear Modeling and Control of Overhead Crane Load Sway", Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME, vol. 110, Sep. 1988, pp. 266-271.
Murphy et al., "Digital Shaping Filters for Reducing Machine Vibration", 1992 IEEE, 5 pages.
Noakes et al., "An Application Of Oscillation Damped Motion For Suspended Payloads to the Advanced Integrated Maintenance System", pp. 63-67, published Aug. 1994.
Noakes et al., "Generalized inputs for damped-vibration control of suspended payloads", Robotics and Autonomous Systems 10, 1992, pp. 199-205.
Noakes et al., "Implementation of Damped-Oscillation Crane Control for Existing AC Induction Motor-Driven Cranes", pp. 479-485, published Aug. 1994.
Noakes et al., "Shaping Inputs To Reduce Vibration For Suspended Payloads", pp. 141-150, published Aug. 1994.
Ohnishi et al., "Automatic Control Of An Overhead Crane", IFAC Control Science and Technology, 1981, pp. 1885-1890.
Petterson et al., "Parameter-Scheduled Trajectory Planning for Suppression of Coupled Horizontal and Vertical Vibrations in a Flexible Rod", pp. 916-920, 1990.
Ridout, A. J. "New Feedback Control System for Overhead Cranes", Electric Energy Conference, Oct. 1987, pp. 135-140.
Sakawa et al., "Optimal Control of Container Cranes", Automatics, vol. 18,
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