Sharif Digital Repository

In the present study, waves maker and its effective parameters has been investigated. Different kind of wave makers have been investigated and compared with each others. Then, according to marine laboratory requirnents such as Dimensions, seakeeping tests, installation place and budget, a proper wave maker is designed. In design procedure, differential equations of waves and paddle wavemaker, wavemaker's power, forces on paddle and mechanical system with servo motor are used. For improving efficiency of system and converting the rotary motion to linear motion, a ball screw is utilized.
 

The servomechanisms have wide industrial application such as robotics, Computer Numerical Control (CNC) machines, automated manufacturing and solar tracking. Several methods have already been proposed for servo motor control that the most important of them are Proportional Integral Derivative (PID), H2/H--, intelligent based controllers, and model predictive control. Problem specifications and user requirements, will determine the appropriate approach in each case. The aim of this thesis is construction of a real-life camera stabilizer to be used in the motion picture industry. Effects of base movement on the performance should be decreased by choosing appropriate sensors and control... 

In recent years, rehabilitation has become of particular importance due to direct connection with the quality of life of human beings. Balance training and assessment devices have been designed to provide means for rehabilitation of patients with balance problems. Sharif balance robot is an example which has been developed at Sharif University of Technology. The subject stays on a plate with active rotation in both Medial-Lateral and Anterior-Posterior directions. The active rotation of this plate is provided by two electrical motors embedded inside the machine. Position commands for this plate are sent to the electrical motor by the control hardware which consists of a PC104 running...