Resources Contact Us Home
Two degree of freedom controller

Image Number 7 for United States Patent #5195028.

A PI type 2DOF controller comprises setpoint filter for receiving a setpoint value, and outputting a control setpoint value, the setpoint filter having a transfer function which follows the setpoint value, and is expressed by the following formula: ##EQU1## where T.sub.I : an integral time, S: a Laplace operator, .alpha.: a constant which can be set between 0 and 1, and .beta.: a constant which can be set between 0 and about 10, deviation-calculating portion for calculating a deviation between the control setpoint value and a control value fed back from a controlled system, control operation portion for receiving the deviation, executing at least a PI (P: proportional, I: integral) control operation, and outputting a manipulative variable, and applying portion for applying the manipulative variable to the controlled system.

  Recently Added Patents
Method and apparatus for disease diagnosis and screening using extremely low frequency electromagnetic fields
Process for recovering and recycling an acid catalyst
Method and system for accomplishing user equipment purge
Solution based precursors
Method of enhancing corrosion resistance of hollow vessels
Method and apparatus for controlling peak amplifier and doherty power amplifier
Light powered hearing aid
  Randomly Featured Patents
Recreational chair
Garden scissors
Code design and implementation improvements for low density parity check codes for multiple-input multiple-output channels
Well cementing slurries containing fibers
Faucet with pullout spout
Apertured, continuous filament fabric
Self-adjusting level for determining leveling between two distant points
Method and structure for attaching a lens to a housing in an automotive lighting assembly
Microbiological synthesis of hydroxy-fatty acids and keto-fatty acids
Optical microdevice with rotatable microactuator