FAULT TOLERANT CONTROL SYSTEMS: A PASSIVE APPROACH FOR SINGLE TANK LEVEL CONTROL SYSTEM

Authors:
  • PRPatel Himanshu Kumar R.
    Patel Himanshu Kumar R.
  • SAShah Vipul A.
    Shah Vipul A.
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Abstract
The paper construes Passive Fault-Tolerant Control Systems (PFTCSs) by examining the approaches from both philosophical and practical points of view. The objective of PFTCS approach is to maintain the desired performance and system stability with the system, actuator faults, and process disturbances. In this paper passive model-based fault tolerant control system in case of a system, actuator faults, and process disturbances are designed for single-tank system and are simulated with the linear model using Matlab. The faults are in single-tank system faults that are modeled as a leak in tank and actuator faults that are modeled as a fall in actuators (control valve) opening, which could lead to a large loss in the nominal performance. The model-based passive fault tolerant control system is designed using a combination of Neural Network (NN) and PI controller to detect faults in the system and maintain the performance and stability. Simulation results are shown and compared between fault tolerant control system and non-fault-tolerant control system with faults and process disturbances. The simulation results are shown in terms of MSE, hence there is a promising performance increase due to the designed controller strategy.

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