Design, model, prototype, test, analyse and evaluate a mechanical human arm (shoulder to wrist)
Bachelor Thesis from the year 2007 in the subject Materials Science, grade: 1,0, University of the West of England, Bristol, course: Individual Project, 75 entries in the bibliography, language: English, abstract: This study sets out to investigate, model and analyse a mechanical human arm. The study consists of four main steps: the literature research, modelling the mechanical human arm, building the model and finally analysing it. The mechanical human arm is the same size as the real human arm of a 20-year-old male. The range of motion is also the same. The investigations cover the functionality of real human arms, the history of prostheses, and applications of mechanical human arms in robotics. Requirements that are based on these information are defined and lead to the first model. This model is tested, rapid-prototyped and evaluated. Weaknesses are shown and an improved model is developed. Analyses of stresses and strains support the design decisions. The model is designed in such a way that it is possible to add in further investigations components such as motors, pneumatic or hydraulic elements in order to allow the model to be part of a humanoid robot.
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abduction/adduction adduction ALGOR analyse angle part contact angled surfaces Available ball and socket bones button head screws central shoulder centre of rotation Chart diameter elbow joint elbow part contact elbow to forearm elbow to upper flexion/extension force Fused Deposition Modelling Gordon Smith Hexagon socket button hexagon socket head holes humanoid robot Individual Project joint Figure lateral rotation limit flexion limit the range lost-wax casted lugs mechanical human arm medial elbow medial rotation medial shoulder ring medial wrist ring meeting Meeting-time minutes Attendees movements neutral position o’clock omoplate contact part.par physical model possible pronation prostheses prototype radioulnar joint range of motion real human arm redesigned model requirements robotic arm screws M3 self-made shoulder connection shoulder joint shoulder to upper side view source socket button head socket joint Solid Edge stresses and strains surfaces that limit titanium top view source ulna wrist angle wrist joint wrist to forearm wrist to hand