Passive Approach for Fault Tolerant Controller Using Hybrid Controller Structure for Effective Level Control of Conical Tank System

Himanshukumar R Patel,Vipul A Shah

doi:10.3844/jmssp.2020.35.46

Abstract

The Article Propose An Efficacious Fault Tolerant Control (FTC) Strategy Using The Hybrid Controller Structure To Establish Stable And Tracking Control With Two Faults Constrain In The Area Of Two Tank Canonical Non-Interacting Level Control System (TTCNILCS). Many Process Industries Use Canonical Tanks Because Of Its Varying Cross-Section Area Which Contributes Better Throughput From An Outlet For Different Material. Hence TTCNILCS Exhibit Nonlinear Behavior Because Of Its Changing Cross Section Area. The Problem Of Passive FTC (PFTC) For The TTCNILCS With The Unknown Actuator And Sensor Fault Is Investigated. The Actuator And Sensor Fault Is Assumed To Have No Traditional Affine Appearance Of The System And Control Input. Hybrid Controller (Neural Network Plus PID Controller) Is Used To Design PFTC And Implement To Achieve Satisfactory Steady-State Performance From TTCNILCS. The Effectiveness Of The Proposed Controller Validate From The Simulation Results And Errors Like MSE, ISE And ITAE.

Highlights

Petrochemical and food process industries, Safety and cost-effective functioning of the these plants depends among other parameters, on controller designs that account for essentially nonlinearity of the complex processes, operative issue, constraints and uncertainties, as well as an abnormality in the processes (Patel and Shah, 2019a)
This paper proposes Passive Fault Tolerant Control (FTC) strategy using Neural Network plus conventional PI controller which fulfills the most of the control requirements very effectively for the TTCNILCS as mentioned below:
To check the robustness of the design PFTCS, the design basis two faults and process distrubances are introduced into TTCNILCS simentously or at the same time

Summary

Introduction

Petrochemical and food process industries, Safety and cost-effective functioning of the these plants depends among other parameters, on controller designs that account for essentially nonlinearity of the complex processes, operative issue, constraints (i.e., system, actuator and sensor faults) and uncertainties (i.e., process disturbances), as well as an abnormality in the processes (Patel and Shah, 2019a). The author of (Patel and Shah, 2018b) designed FTC using fuzzy logic and conventional PI controller and reported good control performance in simulation platform with system fault and undefined process disturbance. Thereafter in “in press (Patel and Shah, 2019b)” author validate the proposed FTC strategy from implemented on experimental single-tank noninteracting system with system component (leak) fault. This paper proposes Passive FTC strategy using Neural Network plus conventional PI controller which fulfills the most of the control requirements very effectively for the TTCNILCS as mentioned below: Stabilizing control under two fault and different magnitude conditions of tank 2 level is obtained with low transient and without any steady state problem. Mathematical model of TTCNILCS with actuator and system component (leak) faults given as follows (Patel and Shah, 2019a): PID Controller Design.

Simulation Results

Conclusion

Funding Information