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Control system and method for remote control of hardware components

  • US 10,152,048 B2
  • Filed: 04/26/2013
  • Issued: 12/11/2018
  • Est. Priority Date: 02/13/2013
  • Status: Expired due to Fees
First Claim
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1. A control system comprising:

  • a first hardware component,a second hardware component, the first and second hardware components outputting a process variable,a server which is remote from the hardware components, wherein the hardware components are in communication with the server so that data can be communicated between the hardware components and the server using a field-level protocol,a primary control module which is implemented as a service running on the server, the primary control module forming part of a direct control layer in the control system and being operable to communicate with the hardware components using the field-level protocol to control at least one of the hardware components,a feedback loop which communicates the process variable to an input of the primary control module,a controller with delay compensator which modifies the process variable by a delay compensation value via an artificial delay block to compensate for a delay in the communication between the primary control module and the hardware components, the controller with delay compensator including a Smith Predictor, the Smith Predictor modifying a process error instead of the process variable by a delay compensation value to compensate for a delay in the communication between the primary control module and the hardware components, anda comparator unit which incorporates a first input which receives the process variable and a second input which receives a reference value, wherein the comparator unit compares the process variable with the reference value and outputs a comparison value to an input of the primary control module, and wherein the controller with delay compensator modifies the process variable or an error value by the delay compensation value.

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