Open loop and closed loop control systems, Feedforward control, Cascade control, Ratio control, Control system design, Digital control systems, Industrial controllers, Laplace Transforms & Transfer functions, Control system stability, Digital control algorithms, Frequency response analysis of control systems, etc.
Optimal control is whereby the requirements are formulated as either the minimization of a cost index or the maximization of a performance index of an operational control system.
Optimal control is utilized in a number of disciplines such as aircraft … Read more
AC generators can be utilized in high precision control systems. The AC generator rotor is rotated by the rotating shaft (i.e. the shaft from the motor being controlled). The output AC frequency is proportional to shaft speed. Zero crossings per … Read more
A safety function is executed by the safety-related parts of the machine control system to achieve or maintain the equipment under control in a safe state with respect to a specific hazard. A failure of the safety function can result … Read more
This is part of the control system of a machine that prevents a hazardous condition from occurring. It can be a separate dedicated system or it may be integrated with the ordinary machine control system.
The complexity of a safety … Read more
A cascade control system typically consists of a primary or master controller that generates a control function that serves as the setpoint for a secondary or slave controller. That controller in turn utilizes the actuator to apply its control function … Read more
Robust control is normally used to handle systems with uncertainties & disturbances and with high performances. The objective of robust control is to be able to design controllers that achieve a desired level of performance and also, be able to … Read more
One of the objectives of a control system is to achieve good plant performance in the face of uncertainty. The major sources of uncertainty in control are:
Unmeasurable perturbations produce output deviations. With a … Read more
Centralised control is usually carried out via computer software, having as inputs all the available sensors and producing signals for all the available actuators in the system. This control strategy is the most powerful, at least in theory, capable of … Read more
Adaptive control system adjusts to changes and modifies its parameters to fit the prevailing circumstances. The adaptive control system is based on the use of a microprocessor as the controller. Such a device enables the control mode and the control … Read more
The mode of control is the way in which a control system makes corrections relative to an error that exists between the setpoint of a controlled variable and its actual value.
We have a number of ways (i.e. control modes) … Read more
