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Robotic provide technology advancement for

Mars, Robots, Space Exploration

RUDRA ROBOTICS is definitely working on Mars rovers and robotic provide from previous 7 years. The TEAM RUDRA SRM ROBOTICS ROVER looks for the best spot for collecting the soil sample and do the research and experimentation with the Martian ground for the moisture volume, temperature and pH. The rover will be able to conduct so many responsibilities which will help the astronauts just like accumulation of tools and objects by means of rover and deploying those to the heads provided. The robotic provide is set up on the mobile rover and YPR (yaw, pitch and roll) has been assembled within the arm combined with the mechanical gripper attached to that. During RD phase, the team focused on creating an arm which was useful and simple and it could also be used in sector and was successful to do so.

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The mechanism [1] of this automatic arm is known as a four-bar mechanism [2] which in turn lets the arm to orient the gripper parallel to the surface area. The provide is a interconnection of two parallelograms in a manner that on a nominal actuation in the electronic actuators we get optimum actuation from the end effecter. The arm has a independent compact device that provides the YAW, FREQUENCY, and MOVE motions, providing six degrees of freedom to the arm. The arm is capable of turning angle greater than 360áµ’ throughout the fixed top to bottom axis. The gripper is a power mess mechanism that converts the actuators rotary motion into a linear motion of a lead screw and further to seite an seite motion of the two paws of the same. The whole arm uses 7 electrically driven actuators, 5 rotary and two linear. The heavy measured instrument within the arm are put near fitting so as to prevent stress on arm because of self fat and also maintains the centre of gravity of the arm on close to the rotational axis of the adjustable rate mortgage.


The automatic arm can be mounted on a turn table consisting a gear of module 2 and website link fixtures. Turn table rotates in a gigantic bearing to counter the two axial and radial weight of the arm. The two backlinks of the equip are linked with each with help of shafts and a mounting plate, two parallelograms happen to be formed by simply both the links. The successful length of the first link is 500 millimeter and that of the 2nd website link is 350 mm. The four-bar system of the provide [3] allow the gripper to do tasks conveniently. One actuator is mounted on the change table as the other is mounted on the first link. 1st actuator provides actuation to the initial link and 2nd actuator provides otherdirection to the second link. The actuators are having a heart stroke length of 90 mm.


The YPR is compact to make using supplies like aluminum and MC nylon(MC901) actuated using three servo engines. The domestico motors is suitable for for this equip in rpm management, accuracy and lightness as compared to other comparable finely-detailed motors. 1 servo is employed with a differential case ratio 1: 6th which is responsible for the yaw motion in the gripper plus the other two motors having a gear ratio of 1: 3 are in charge of for frequency and roll motion. The entire YPR method is bolted on a 1: 6 servo engine gear which gives 180áµ’ rotation to the YPR system which usually acts as the yaw of the end effecter. This servo can also in give move to the tenir when aiming downwards to lift hefty objects and rotating these people. The assembly includes the two bevel gears [4] screwed to the servo motor unit gears positioned parallelly facing each other and connected to one another using a third bevel items larger in diameter specifically torque increment and reduced rpm. Two parallel aluminium shafts sits down in a bearing hub for one end and the opposite end fixed rigidly to the servo motor shaft. Third the whole length transverse towards the other two shafts moves through the third bevel items and sits down in the bearing hub. The bearing centre is a specifically designed aluminum portion which encapsulates three bearings, holds three shafts and keeping the bevel gears meshed. The gripper is attached to the third front facing bevel gear. The two domestico motors will be calibrated to offer pitch and roll movement to the tenir. When both actuators receive actuation in same way pitch is usually obtained although actuating in different directions gives roll movement. The gripper is bolted to the third front facing bevel items.


Grippers [5] are designed with unique characteristics to get specific applications. To help the astronauts about mars and performing various activities such as collecting rocks for evaluation, the tenir was designed upon Solid Performs software. A 12V Deb. C. motor unit was in conjunction with the lead screw [6] using a great aluminium coupler. A mild metal part can be linked with the lead attach. The revolving motion of the D. C. motor actuating the business lead screw offers translator action to the slight steel portion.

As the G. C. electric motor rotates clockwise the part in conjunction with lead attach moves in excess making the fingers wide open. Anticlockwise motion of the lead screw movements the coupler downwards closing the fingers of the gripper. The prendre is designed to get objects about 70 millimeter in size. The tenir is capable of picking a lot up to 5kg between the 25mm thick fingers with exclusively designed contours faces to allow maximum exposure to the object.

One rotation of the Deb. C. motor unit gives a translation motion of 2mm to the coupler. This 2mm movements gives a great actuation of 4. 5mm to the gripper fingers. A four-bar system is used to get the kinesis of fingertips through the coupler to seite an seite move the fingers.

A 3D model of the gripper mechanism is proven in the number 2 . The linkages one particular, 2, three or more and some provide the seite an seite motion that are being actuated by the coupler moving linearly due to business lead screw device.

Stress Examination

Examination of the automatic arm [7] was performed on CATIA V5. Static load of 120N was applied on both the links from the arms intended for deformations. The results attained showed optimum deflection of 0. 00739mm.

The YPR was given a load of 75N. Results showed a maximum deviation of zero. 026mm in the positions with the servo plates.


The robotic arm is being fabricated through the use of aluminium field channels of cross-section 2020 mm. Good grade of aluminium 6061 is used to get fabrication. The length of link 1 is 500 mm which of website link 2 is usually 350 millimeter. Each link is a four-bar mechanism itself providing more flexibility to the arm.

The two backlinks are linked to each other applying 2 seite an seite aluminium china of thickness 4 logistik, the dishes have been slice in the form of a triangle to fulfill the design requirements, the plates are having three holes to allow for the box programs of the adjustable rate mortgage using the mild steel shafts of 8 mm.

Two electric power linear actuators are being used to provide the motion to the links, stroke of each actuator is approximately 100mm.

Part L4CT4P

Stroke 4″

Input 12VDC

Average speed 0. 5″/second

Dynamic insert 110lbs

Static load 500lbs

Table you: Specifications of Linear Actuator [8].

The YPR was fabricated using aluminium stop which was machine made to get the ideal product. The bevel things were fake using MC Nylon (MC901). Shafts to get the YPR are 9mm hollow shafts held between your bearing as well as the servo base preventing the displacement of the gears.

Major parts of the prendre were created by milling aluminium prevents. Links pertaining to four-bar were made using mild steel. Fingertips were 3D printed and plates had been cut out of SS piece. Shafts of 4mm of mild metal were employed of different sizes.

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