Speed control of DC motor is very critical in most of the industrial systems where accuracy and protection are of essence. This paper presents the simulations of Proportional Integral Derivative Controller (PID) on a 16-bit PIC 24F series... more
Speed control of DC motor is very critical in most of the industrial systems where accuracy and protection are of essence. This paper presents the simulations of Proportional Integral Derivative Controller (PID) on a 16-bit PIC 24F series microcon-troller for speed control of a DC motor in the presence of load torque. The PID gains have been tuned by Linear Quadratic Regulator (LQR) technique and then it is implemented on microcontroller using MPLAB and finally simulated for speed control of DC motor in Proteus Virtual System Modeling (VSM) software.Proteus has built in feature to add load torque to DC motor so simulation results have been presented in three cases speed of DC motor is controlled without load torque, with 25% load torque and with 50% load torque. In all three cases PID effectively controls the speed of DC motor with minimum steady state error.
Thevein's theorem is used to simplify the analysis of complex network into a standard equivalent network. Suppose that a complex network consists of number of sources and resistors connected in any manner, then according to this theorem.... more
Thevein's theorem is used to simplify the analysis of complex network into a standard equivalent network. Suppose that a complex network consists of number of sources and resistors connected in any manner, then according to this theorem. "Any network can be replaced by a single source in series with a single resistance."
It will be seen that inductor voltage and capacitor voltage are 180 degree out of phase with each other i.e. they are in direct opposition to each other.
A light source or an oven is used for several seconds to force a heat gradient along a buried channel in printed circuit board. Then, it is let to cool while we analyze the emitted heat through end points to expose the hidden defects. The... more
A light source or an oven is used for several seconds to force a heat gradient along a buried channel in printed circuit board. Then, it is let to cool while we analyze the emitted heat through end points to expose the hidden defects. The heat diffusion equation is used numerically for a common defect to predict the electric current flow by means of thermal current flow. This patented method is a novel non contact optical inspection, to challenge the market demand for miniaturization with efficiency.
A direct extraction method for small signal parameter extraction of a linear circuit is presented. Unlike the numerical method approach, this algorithm doesn't make use of "start values" and performs complex... more
A direct extraction method for small signal parameter extraction of a linear circuit is presented. Unlike the numerical method approach, this algorithm doesn't make use of "start values" and performs complex symbolic computation in conjunction with numeric subroutines. Extraction of small signal parameters of a particular circuit illustrates the viability of the method and evidences the elements of the associated
