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CONTROL SYSTEMS

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  1. CONTROL SYSTEMS

  2. Control Systems General Nature of the Control Problem Set of performance standards Standards establish control parameters A description (model) of physical system Analyze performance of system model Modify system to improve performance

  3. Types of Control Systems • Open-loop control system: The output quantity has no effect upon the input quantity • Closed-loop control system: The output has a direct effect upon the input quantity

  4. Open-loop System Open-loop Output Command Reference Selector Ref Dynamic Unit Input Input

  5. Closed-loop System Closed-loop Combiner (+-) Output Command Ref Reference Selector Dynamic Unit Input Input Feedback Element

  6. Application Areas • Electrical circuits • Mechanical Systems • Thermal Systems • Fluid Systems

  7. Types of Control • Analog: Continuous in time • Digital: Discrete in time

  8. Application - Prosthetics

  9. Prosthetic Limbs That Can Feel Transplant nerves from amputated hand to chest Patient can feel hand sensation in chest Prosthetic arms with sensors on fingers! Transfer tactile info from device to chest Wearer feels like they have a real hand Application Hold your pencil Think of life without feeling in your fingers

  10. Technology • Peripheral Nerve Interface • Implanted device • Move arm like real one • Sense arm’s motion, location, and feel objects • Electronics, controls, human factors, wireless • Size: a pill inserted in what is left of amputated arm or shoulder or external sensors Brain Nerve impulses from residual limb Bionic arm Implanted or external sensors

  11. The DEKA Arm We begin with 60 Minutes 60 Minutes