Dr Vipin Jain 
What is Steady State Error? Steady-state error is the limiting difference between a reference input and the corresponding output, provided that this difference approaches a finite value as time tends to infinity. This error is one performance measure, not a complete measure of control quality. A design must also meet stability, transient response, disturbance rejection, … Read more
What is an Open Delta Connection Transformer? An open-delta transformer bank uses two single-phase units to supply a three-phase, three-wire load. The V-V connection can keep service available after one unit is removed from a closed-delta bank. It can also be a planned arrangement for smaller loads or later expansion. Its main limitation is reduced … Read more
What is Nyquist Stability Criterion? The Nyquist stability criterion is a frequency-domain method in control engineering for determining closed-loop stability from the Nyquist plot of open-loop control systems. For a unity negative-feedback loop with loop transfer function L(s)=G(s)H(s), the plot shows how L(s) maps the Nyquist contour around the critical point -1+j0. The method can … Read more
What is a Controller? In control systems, a controller calculates a command for the plant from signals such as the setpoint, measured process variable or estimated state. Its design shapes tracking, disturbance rejection and robustness. Controllers are a central part of control engineering. A controller must be selected and tuned for the plant, actuator, sensor … Read more