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Through this article, we will focus on the most common problem in the internal model control for multivariable systems with multiple time delays, that is the reversal of the corrector. This problem seems to be quite annoying when we face a non-square system. Our ultimate work developed through this paper, will be concentrated on a specific work structures to overcome the mean difference between the...
This paper deals with a discretization of multivariable fully actuated linear systems controlled with an Internal Model Control (IMC). The proposed IMC is based on a specific inversion method and it presents an extension to the case of Multi-Input-Multi-Output (MIMO) discrete-time systems. The case of fully actuated linear system is considered and it approved the effectiveness of the proposed approach...
This paper deals with architecture and algorithm design of networked control systems (NCSs) to cope with network outages. A Networked PID controller and an internal model control based tuning scheme is proposed, using the jitter margin to ensure stability despite dropped packets. For longer periods of disconnection, an outage heuristic is proposed. The control design and outage heuristic need only...
Automatic control for loading process of coal mine train in a large coal preparation plant is studied in this paper. Considering the production practice, a hybrid control scheme is proposed by combining mode-based control and PID control techniques. This hybrid control system consists of a loading capacity setting model, a loading capacity PID controller and a model-based traction speed feedforward...
A control scheme is presented to achieve stabilization, satisfactory dynamic and steady state control performance for a general unstable process with dead time, where the rational function part of the process could be of non first order and the dead time of it larger than the upper bound for stabilization by PID control. The idea is to remove the stable lag part of the process by an internal model...
Internal Model Control (IMC) yields very good performance for set point tracking, but gives sluggish response for disturbance rejection problem. Feedback/feedforward controller has been widely used to overcome the disturbance rejection. However, feedback/feedforward IMC is suffering with the difficulty of measuring disturbance and/or making disturbance model in real plant due to the possibility of...
Considering the characteristics of time delay, time variables and variable operation condition in process control system, The partial models are built based on the different operating points integrating fuzzy membership function with weighted sums to improve the traditional internal model control(IMC), and the fuzzy membership functions are obtained by recursion identification method. Then multiple...
A new tuning method is proposed for fuzzy PID controller based on internal model control theory. First, the analytical model of the fuzzy PID controller is expressed as a linear PID controller plus a nonlinear compensation item. Then, the internal model control method can be used to approximately design the parameters of fuzzy PID controller analytically. Finally, stability of the fuzzy PID control...
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