Transient Response of a Position Controller
Transient Response of a Position Controller When a step input is given to a position controller, the loop takes time to react to the applied input. Also, depending upon the given system parameters, oscillation can occur at the output during the transient time period. The major cause of the time delay comes from the added inertia of the moving parts. Therefore, the higher the inertia, there will be more delay. Usually, the system gain is preferred to be high to improve system response time. However, when the gain becomes excessive, it will cause undesired overshoot at the output. Transient response of a system can be easily observed on an oscilloscope when the system is stimulated with a square wave input. Such an arrangement is shown in Figure 4. Figure 4 : System diagram for Transient Respond Experiment The function generator in Figure 4 provides synchronized square-wave and ramp signals. As it is shown in the figure, the ramp signal is used to drive the X-...