The paper presents a method for output feedback sliding mode control for permanent magnet (PM) stepper motor which is known to be a differentially flat system. Discretization of continuous time model of the stepper mo...
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The paper presents a method for output feedback sliding mode control for permanent magnet (PM) stepper motor which is known to be a differentially flat system. Discretization of continuous time model of the stepper motor has been carried out and linearizing outputs are selected. Discrete state variables and control inputs are obtained in terms of linearizing outputs and their higher order differences. Linearized equations for the system are thus obtained and auxiliary control is designed using reaching law approach. Then the actual control is obtained in terms of flat output and state variables. It has been shown that this can be expressed in terms of the flat output samples only. The control when applied to nonlinear system will give the same result as that of the state feedback case.
This paper presents the design, fabrication of a microcontroller based resistance welding system which is used for performing a welding process. The paper is divided into 4 sections. First, a brief introduction to wha...
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This paper presents the design, fabrication of a microcontroller based resistance welding system which is used for performing a welding process. The paper is divided into 4 sections. First, a brief introduction to what is a welding, method of welding control such as resistance and spot welding is given. Secondly, the critical factors in the design of a welding process are dealt along with the principle of the welding process. Following this, the introduction to the design of the control scheme employed by us with the basic block diagram of the welding system and the functioning is presented. Thirdly, the design and development of the control software algorithm is dealt with. Finally, the conclusion is drawn along with its working and future improvements.
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