Flow fluid between moving parts is providing the damping force. Such characteristic can be utilized to build fluid dampers for a wide variety of vibration control systems. Most previous works have studied the application of fluids damper in pistons/cylinders actuator, where the kinetic energy of a vibrating structure can be dissipated in a controllable fashion. The reduction of the friction can cause a sudden jump in the velocity of the movement. Stick-slip friction is present to some degree in almost all actuators and mechanisms and is often responsible for performance limitations. To overcome this problem, this report investigates the capability of designing a fluid damper that seeks to reduce the friction in the device by integrating it with a McKibben actuator. It is also reduced the total weight of such damper. In this paper, the concept of McKibben actuator has been reviewed, the modelling of device made is also presented. Also, the model has been validated experimentally. It is founded that the model predicts the behavior of the test rig with accuracy 85%. Also, the total weight could be reduced to 50% from the original weight.

The changes in dynamic properties such as natural frequencies and mode shapes are used in vibration health monitoring as tools for assessing the structures health status. They are, however, also affected by environmental conditions like wind, humidity and temperature changes. Of particular importance is the change of the environmental temperature, and it is the most commonly considered environmental variable that influences the vibration health monitoring algorithms. This paper discusses how cable-strut structures can be designed such that their first natural frequency is less sensitive to the temperature changes. The optimization problem is solved by using a genetic algorithm. The level of pre-stress can be regulated to achieve the solution, particularly when a symmetric self-stress vector is chosen.

As science and technology develop quickly, suitable measurement system is becoming more achievable. In dynamics of structures, measuring vibrations take a serious view during the process of design and construction to avoid resonance. The main objective of this study is to establish a vibration measurement system for a laboratory vibration unit by using a virtual instrumentation system. The Arduino microcontroller is used as the receiver of the electrical signals coming from the displacement sensor, which is connected to the vibration unit. The microcontroller then processes the electrical signals and send it to LabVIEW software on the computer for processing. The established measurement system is able to calculate the vibration of the moving body. Hence, the natural frequency of the system could be determined, and shock absorber for the unit could be designed. Results have been validated using calculated theoretical results of the unit. Thus, the unit is ready to conduct laboratory experiments on the concept of mechanical vibration.