Development of materials technology has spawned a new type of material constructed of multiple layers stacked. This material is called a composite material. Composite material consisting of more than one type of material and is designed to get the best combination of characteristics of each constituent component. Basically, the composite can be defined as a macroscopic mixture of fibers and matrix. Fiber is a material that is (generally) much stronger than the matrix and the function is to provide tensile strength. While the matrix serves to protect the fibers from environmental effects and damage from the impact.
Archive for August 25, 2011
In the decades after the Wright brothers first flight, all aircraft used mechanical and hydraulic control systems. The pilot controls the aircraft by using a direct style. The trick is to move the sticks and rudder pedals are connected by steel ropes and the pushrod to move the control surfaces on the wings and tail.
When power from the engine and improved speed, it takes a greater force, and the system is used to help hydraulic. Thus, all aircraft with large size and high performance has a system of hydro-mechanical flight control. These conventional flight control systems to limit the aircraft engineer when doing configuration and design in relation to the stability of flying.
PLC (Programmable Logic Controller) was first introduced in 1969 by Richard E. Morley is the founder of Modicon Corporation. According to the National Electrical Manufacturing Association (NEMA) PLC is defined as a digital electronic device with a programmable memory for storing instructions that execute specific functions such as logic, sequence, timing, counting, and arithmetic to control an industrial machine or process accordance with the desired industry. PLC is able to do a continuous process according to the input variables and provides the programming decisions at will so that the output under control.