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
Systems and methods for online search recirculation and query categorization
Instantaneous single click perpetual date mechanism
Glass or glass-ceramic pane reflecting infrared radiation
Content protection apparatus and content encryption and decryption apparatus using white-box encryption table
Catalyst composition with nanometer crystallites for slurry hydrocracking
Demand based power allocation
  Randomly Featured Patents
Positive photosensitive composition, positive photosensitive lithographic printing plate and method for making positive photosensitive lithographic printing plate
Real-time annotation of images in a human assistive environment
IV administration set identification system
Method of connecting covered wires
Sealed fuel level detector
Printhead assembly with air expulsion arrangement
Bicyclic piperidine and piperazine derivatives as GPCR modulators for the treatment of obesity, diabetes and other metabolic disorders
Method of background downloading of information from a computer network
Programmable physical action during integrated circuit wafer cleanup
Multi-speed transmission