a. General requirements of the control system.
Each control system must be stable. This is a key requirement. In addition to the absolute stability, a stability control system should mempuyai relatively decent. A control system must also be able to reduce the error to zero or to arrive at a price that can be tolerated.
b. Basic issues in the design of control systems.
On the practical conditions, there are always some disorders that work on the plant. This interference may come from outside or from the inside may be random and may be able to predict. Kendalian harusmemperhitungkan any disorder that affects the output variable. Analysis. Analysis of the control system is research in certain circumstances where the performance of the system are known mathematical models.
Design.
Control system design is the process of finding a system that can accomplish a given task. In general, the design procedure is not obtained directly but requires a trial and error method of synthesis. Synthesis is looking for a system with a direct procedure that will work in a specific way. Usually this kind of procedure is mathematically from the beginning to the end of the design process.
c. The basic approach in the design of control systems.
The basic approach in the design of any practical control system should involve trial and error method. Synthesis of linear control system can theoretically be done and mathematically, the designer can specify the components needed to achieve a given target. However, in practice the system may be limited by several constraints atausifat nonlinear. In addition, the characteristics of the components may not be known precisely. So always required procedure of trial and error
Control System Components
In accordance with the overall control function of the components of the control system is divided into 4 Courant, namely:
a. Sensors and Transducers
Sensors are used as elements that direct contact with the measured while the transducer is used to convert the measured physical quantities into other physical quantities. In general, is changing the physical quantities of electricity menjadibesaran such as pressure, temperature, flow, position etc.
b. Error Detector
Measuring error (errors) that occur between the actual output and the desired output.
c. Mover
This tool is used to control the flow of energy to the controlled system. This tool is also called the final control elements for example an electric motor, control valves, pumps, hydraulic cylinders and others. The output elements must mempuyai of the ability to move the load to a desired price.
d. Amplifier
This amplifier is divided into 2 portion is a power amplifier and voltage amplifier. Power amplifiers are needed because almost all the events the power of the “error detector” is not strong enough to drive the output element while the voltage amplifier usually found in many op-amp. This circuit can perform operations such operasimatematis summation, integration, differentiation, and others.