The Dynamic Parts Principle stipulates the need to ensure the optimal level of the system dynamism, both its mobility and the possibility to change its other parameters.
Traditional definition of the principle:
The characteristics of an object (or external environment) should change to be optimal at each stage of work.
Divide an object into parts capable of movement relative to each other.
If an object is rigid, make it movable.
First of all, the Dynamic Parts Principle stipulates transition of a component or system from the static condition into the dynamic one. The system dynamism is often understood only as mobility of its parts. It is the most graphic representation of dynamism when parts of the system become mobile, their rigid connection is replaced with a hinged or flexible one.
However, this interpretation of the principle is quite limited. Any attributes of an object can become dynamic: its shape, surface or internal-structure condition, phase state, the material of which the component is made. Thus, to change the shape, it is possible to make the component flexible, e.g., elastic or to use pneumatic structures.
Fields involved in the operation of a particular system can also become dynamic. Making the field dynamic enables to change the direction of its action, it is possible to change from the static field to the pulse one, to regulate the frequency and amplitude of impulses, to make oscillatory processes irregular, to provide or eliminate resonance phenomena, to provide for pauses of action.
The Dynamic Parts Principle can be used where better coordination of action of the system components and of the system itself with the supersystem. Ensuring the optimal dynamism of the system predetermines improved manageability as it enables to change the system parameters using the control.
Example. Polar station
The polar research station is a small town arranged at an inaccessible place and equipped with everything necessary for living and work. To expand the research area, the station is made mobile. The station premises are installed on telescopic supports combined into a walking mechanism, and the station can change its location independently.
Example. Liquid refrigeration
When liquid is refrigerated, a thin layer of ice forms next to the container walls, it acts as a heat insulator and slows refrigeration of the liquid itself. To accelerate the liquid refrigeration, the container is periodically agitated, and warmer liquid from the middle washes the ice layer at the walls. Such a Chiller by LG can reduce the liquid refrigeration time several times.
Example. Dynamic barrier
Road barriers are used to prevent accidents and vehicle collisions. The defect of the passive barrier is that it brakes the vehicle at the point of contact and can turn it across the road. A barrier made of elastic rollers is free from this defect and prevents the vehicle from leaving the road.
Dynamism manifests itself not only by increased mobility of the system but also indicates a more dynamic change of any parameter of the system. Thus, the first refrigerators – drawers with ice – had a constant temperature. Electric vapour-cycle refrigerators could also regulate the temperature gradually, and modern refrigerators provide for its smooth regulation. Another trend is a refrigerator which can refrigerate and preserve food as well as warm it up.
The Joby tripod is highly mobile. The tripod legs are usually made solid or telescopic. The tripod legs can bend and fix in any direction allowing to place it on almost any surface.