This paper studied the implementation of fractional order PID controller for the control of an induction motor (IM). The perfection of the system performance in terms of response time and robustness is illustrated by adjusting the fractional order integral action and derivative action. A comparative study with a conventional PID controller is carried out. The observer is simple and robust, and ...

A kind of fuzzy-PID controller with adjustable factor is designed in this paper. Scale factor’s selfadjust will come true. Fuzzy control algorithm is finished in STEP7 software, and then downloaded in S7300 PLC. WinCC software will be used to control the change-trend in real time. Data communication between S7-300 PLC and WinCC is achieved by MPI. The research shows that this fuzzy-PID controll...

The robust controller designed by conventional H∞ optimal control is complicated, high-order, and difficult to implement practically. In industrial applications, structures such as lead-lag compensators and PID are widely used because their structure is simple, tuning parameters are fewer, and they are lower-order. Their disadvantages are that control parameters are difficult to tune for good p...

This paper investigates the dynamic model of a nonlinear magnetic levitation system and its precise control using robust control technique. In this study, a magnetic levitation system model is first identified using piecewise linearization technique and numerical computation. Then a robust controller which could stand up to 50% displacement around the operating area is designed and investigated...

Robust controllers designed via H∞ Loop Shaping are complicated and are of order higher than that of the plant. It is very difficult to implement these controllers in practical engineering applications. To overcome this problem, Genetic Algorithm is used to approximate a robust PID controller from H∞ Loop Shaping controller so that the difficulties in implementation of higher order controller c...

The key techniques of intelligent analysis instrument developed are proposed. Based on the technique of virtual instrumentation, the intelligent PID control algorithm to control the temperature of thermal analysis instrument is described. The dynamic character and the robust performance of traditional PID controls are improved through the dynamic gain factor, temperature rate change factor, the...

In this article the modeling aspects of an electrostatic microactuator (μ-A) with squeezed thin film damping effects are presented. The μ-A is composed of a microcapacitor whose one plate is clamped on the ground while the other plate is floating on the air. Its highly nonlinear dynamic model is linearized at various operating points. A robust PID-controller is designed with its parameters-tuni...

Geared Dc motors can be controlled by many controllers which may include the conventional PID controllers and various other techniques. The sliding mode control is one of the good controllers which can be used for conditions like disturbances and parameter variations. The system responses are compared when PID controller is applied to the system. SMC methods yield nonlinear controllers which ar...

In this paper, a piezo actuated micro robot with active force control (AFC) capability is modelled and simulated for an in-pipe application. A mathematical model that describes the dynamic characteristics of the micro robot is first presented. The dynamic response of the robot system subjected to different input excitations is then investigated by initially considering a conventional proportion...

A Sliding Mode Controller (SMC) is adopted in this work with a Proportional Integral Derivative (PID) to employ instead of Power System Stabilizer (PSS). The major proposal is that the effective property of PID and high characteristics of SMC are combined to eliminate the chattering effect of SMC in order to generate best control signal to the excitation system. The robust design of SMC-PID has...