Siddique, Muhammad Asif (030230) 2007 <br/><br/>
2-DOF platform stablizer 

 - Islamabad  Department of Mechatronics Engineering ( Air University Main Campus)  2007 
 - viii,95p.  CD 
<br/><br/>  The platform stabilizing system is one which is capable of always maintaining a horizontal position of top plate of platform relative to the ground as the frame of reference, regardless of the disturbances at its base. The literature survey gives that the Sensor, Actuator, or mechanism types are the parameters used to categorize the stabilizing platforms. The aim of this project is to make a dual axis, platform stabilizing system capable of controlling the platforms tilting angles so as to make it horizontal to the ground at all times. In other words the system is to maintain a static position of the plate, rejecting position disturbances. On 8th October, 2005 the whole world witnessed to the biggest tragedy in the Northern areas of Pakistan i.e. Earth quake where a whole generation of Kashmiri people were lost .The great damage to the sophisticated and costly machines was observed too. We, like millions of Pakistani’s were severely heart stricken for the loss and decided at that moment that we must exhort our efforts of eradicating the possibility of such devastation ever again. Being engineers, we thought of to save the machines from earth-quack waves. So the idea of platform stabilization came in mind. 	The mechanical part of the project involves from the selection of the best kinematics design through modeling and simulation to the making of the machining drawing for machining of the mechanical parts. The tilt correction mechanism is achieved using three motors mounted on three lead screw / slider mechanism driven links, forming a tripod mechanism. We used 89C51 microcontroller, to control the actuation systems. The electronics of the platform involves driving circuitry for three DC motors, which we have achieved using relay based DC drives. The tilt sensing sensor used is ADXL202E, which has a �2g range. The sensor subsystem consists of the circuitry and the microcontroller control through constant feedback from the sensor to itself.  	The system has been modeled mathematically, graphically and geometrically. All the models have been simulated using different software including Auto Mechanical desktop, NASTRAN and MATLAB. The system is designed and implemented. The experimental results verify the design and model. 
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