In a kinematic chain when a link is fixed, then that chain is known as a mechanism. It can be used to transmit or transform movement, for example motor indicators, typewriters, etc. A mechanism that has four links is known as a simple mechanism and a mechanism that has more than four links is known as a complex mechanism. A mechanism that is required to convey some particular type of work is known as machines. In certain cases, the elements must be designed to withstand the forces safely.
A mechanism is a kinematic chain in which the kinematic pairs are connected in such a way that the first link is attached to the last link to transmit a predetermined restricted movement. The various parts of the mechanism are called links or elements. When two bonds are in contact and a relative motion is possible, then they are known as a pair. An arbitrary set of a link forming a closed chain that is capable of relative motion and which can be made into a rigid structure by the addition of a single link is known as a kinematic chain. To form a mechanism from a kinematic chain you must fix one of the links. The technique that gets the different mechanism by setting the different link in turn is know as inversion.
Katarina Monkova used three methods for kinematic analysis of the fast return mechanism, after the author's conclusion concluding that the computer-aided method is more accurate and faster to compare with others. Himanshu Chaudhary maximum use reclusive ness of a dynamic equation for the assessment of the supporting force, In this author work optimize the vibration and improve the balance of the four-bar mechanism. Selcuk Erkaya carried out the dynamic analysis of the sliding crank mechanism with eccentric connector and planetary gears, in this study there are two types of sliding mechanism-crank one is simple sliding-crank and the second is modified sliding-crank mechanism in modified has a Additional extra The coupling between the connecting rod and the crank pivot as distinct from the conventional mechanism, using the author of dynamic analysis concludes that the force output is more grater in the modified slider-crank mechanism. Kevin Russell et. Alabama. Designed to design the slider crankshaft mechanism to achieve the multi-phase motion generation application typically performed by the adjustable four-bar brush motion generator. Iradj G. Tadjbakhsh has generated the dynamic stability of the flexible connecting rod of a sliding crank mechanism, the crank mechanism of the slider is operated at high speed and rapid response, it is necessary to reduce the mass to the lowest feasible value, in order to Minimizing the inertia effect. Consequently, some member in mechanism is subjected to elastic deformation if the mass of inertia is reduced without considering the elastic behavior, then the operation of the mechanism develops the instability of the parameter resulting in the reduction of the efficiency and reliability of the mechanism To an undesirable degree. The author concludes that large axial load amplitudes are responsible for the occurrence of infinite regions of the instabilities and is also due to the larger axial load.
From the previous literature, a mathematical model of kinematic analysis was used to design the mechanism. The kinematic analysis is mainly divided into the analysis of position, velocity and acceleration. Dynamic analysis is the essential requirement to understand the dynamic behavior of the mechanism which is also called force analysis in which we have to consider all the forces, the mass of each link. Dynamic behavior can be easily understood through the use of static equilibrium analysis. The mathematical model can be used for design, weight optimization, to improve balance and force output. A mathematical model of kinematic analysis and dynamic analysis is generated to know the relation of maximum speed and output of force of the fast return mechanism. After analyzing that mathematical model using MATLAB find the link position in which the force and velocity is maximal.