AUTONOMOUS UNDERWATER VEHICLE: An autonomous underwater vehicle (AUV) is a robot that travels underwater without requiring input from an operator. AUVs constitute part of a larger group of undersea systems known as unmanned underwater vehicles, a classification that includes non-autonomous remotely operated underwater vehicles (ROVs) – controlled and powered from the surface by an operator/pilot via an umbilical or using remote control. In military applications a AUV is more often referred to as unmanned undersea vehicle (UUV). Underwater gliders are a subclass of AUVs. HISTORY: The first AUV was developed at the Applied Physics Laboratory at the University of Washington as early as 1957 by Stan Murphy, Bob Francois …show more content…
Although most are currently in their experimental stages, these biomimetic (or bionic) vehicles are able to achieve higher degrees of efficiency in propulsion and maneuverability by copying successful designs in nature. Two such vehicles are Festo's AquaJelly (AUV)and Evologics' Bionic Manta (AUV). ACTUATORS: An actuator is the mechanism by which a control system acts upon an environment. The control system can be simple (a fixed mechanical or electronic system), software-based (e.g. a printer driver, robot control system), a human, or any other input. . An actuator is a type of motor that is responsible for moving or controlling a mechanism or system. It is operated by a source of energy, typically electric current, hydraulic fluid pressure, or pneumatic pressure, and converts that energy into motion. TYPES OF …show more content…
The term single acting is used when the fluid pressure is applied to just one side of the piston. The piston can move in only one direction, a spring being frequently used to give the piston a return stroke. The term double acting is used when pressure is applied on each side of the piston; any difference in pressure between the two side of the piston moves the piston to one side or the other. Pneumatic Pneumatic rack and pinion actuators for valve controls of water pipes A pneumatic actuator converts energy formed by vacuum or compressed air at high pressure into either linear or rotary motion. Pneumatic energy is desirable for main engine controls because it can quickly respond in starting and stopping as the power source does not need to be stored in reserve for operation. Pneumatic actuators enable large forces to be produced from relatively small pressure changes. These forces are often used with valves to move diaphragms to affect the flow of liquid through the valve. It is responsible for converting pressure into
According to Neumann, a force can be considered a push or pull that can produce, arrest or modify movement and can be measured as F=ma (Neumann, 2010). Force can also be considered the load. In regards to muscle contraction force relative to the joint, the force can be the internal force produced by the muscle itself, the force of gravity or the force of the particular load/weight. Torque is a cross product between force and the distance of the force from the fulcrum and is the ability of a force to cause rotation on a lever. Torque is a measure of how much a force acting on an
A pump is a device which is used to move the fluids, for example, the gases, the liquids and slurries. The pump transfer the volume through physical or mechanical action. The pumps are widely applied in the mechanical industry , pharmacy and domestic field. Positive displacement and centrifugal compose the two main types of pumps.
Personal Watercrafts or "jet skis" are basically Personal Watercraft (PWC) are basically small inboard boats able to travel at high speeds due to large amounts of power and very light weight. Alomst all PWC's are under 600 lbs and most of todays PWC's have at least 90 hp.Not only are PWC's some of the fastest water vehicles they are also some of the most maneuverable water vehicles. This is because PWC's propultion is based on a jet that also is it's turning mechanism. When the driver turns the handlebars the jet (via cables) turns in the direction of the handlebars so the stern is pushed in the opposite direction. This allows the driver to turn at a much tighter angle than traditional boats with keels and rudders.The main drawback to this maneuverability is the fact that if there is no thrust coming from the engine the ability to turn is effictively zero meaning that anytime the driver presses the kill switch (a large red button) they lose all ability to steer. This is extremely dangerous whenever an inexperienced person may drive the PWC back to dock or into shore. PWC's have no brakes and have no ablilty to stop other than turning around. They have an extremely efficient ability to hydroplane (when most of the PWC is above water) and it takes most PWC's a few hundred feet to come to a stop after being at full throttle. This is because 600 lbs + a rider is traveling at a very high speed with only minimal friction to slow them down (since PWC's are made to travel with very little friction).
Hundreds of thoughts swarm through my head, as I think of potential car and launcher designs. It was the beginning of 8th grade. A new year of middle school, a new year of Science Olympiad, a new year of studying for my events, and a new year of challenges: my first building event, Scrambler. I’ve always been interested in science, specifically medicine, ever since I was 7 or 8. I read a book called When I Grow Up, I Want to Be a Doctor, which inspired me to aspire to become a doctor. Ever since then, I’ve been exploring the field of science and medicine through a variety of learning experiences such as Science Olympiad, a science competition consisting of several events that cater to a variety of fields in science. This year, my partner and I were faced with the task of building a mechanical vehicle, powered by a falling mass, that is capable of traveling down a straight, level track with a barrier at the end while carrying an
Divers cannot put the equipment on and immediately dive in. Before diving there are a series of procedures the diver and their partners must do before going down. In addition, the further down the diver dives the more pressure pressing down on the diver which lessens the amount of oxygen in the scuba tank. Therefore, the further down the diver dives the less time the diver can spend on the bottom. But now, by far the largest group of divers is “Recreational Divers”. These dives are practiced at depths of less than 130 feet, from these depths, divers can make a straight ascent to the surface. Diving beyond this limit requires advanced training. Also, when diving the diver must take into account the amount of time spent descending and ascending in the water. If the diver descends too quickly the pressure can deflate their lungs and cause problems. Similarly, if they ascend too quickly nitrogen bubbles can form under the diver’s skin causing bends or decompression sickness. This sickness can be extremely harmful and possibly fatal. Lastly, a dive watch or computer is needed to calculate the amount of oxygen left in their tank and the depth. Dive computers help the divers be aware of their conditions and keep them
4.Exhaust: After the Air/Fuel mix has been burnt the remaining chemicals in the cylinder (water and CO2 for the most part) must be removed so that fresh air can be brought in. As the piston goes back up after combustion the exhaust valve opens allowing the exhaust gasses to be released.
Since the inception of pressurized systems to produce and transmit energy, it has been a constant goal to find safe, dependable means of relieving pressure. The simple, inexpensive, spring loaded relief valves has been manufactured for over a hundred and fifty years, performing its job with varying degrees of reliability over that time period.
A self-driving car would essentially be a computer on 4 wheels that gets inputs from the sur...
Many by now know, the EV that redefined the genre was released to rave reviews. Consumer Reports said that it performed better than any other auto on their test track. Because of all the weight from the low mounted motors it was
A transducer is a mechanism that changes one form of energy to another form. A toaster is a transducer that turns electricity into heat; a loudspeaker is a transducer that changes electricity into sound. Likewise, an ultrasound transducer changes electricity voltage into ultrasound waves, and vice versa. This is possible because of the principle of piezoelectricity, which states that some materials (ceramics, quartz, and others) produce a voltage when deformed by an applied pressure. Conversely, piezoelectricity also results in production of a pressure whe...
so they could compress the air at a much higher pressure so the engine can
An unmanned aircraft is a plane that is flown without the use of a crew or pilot. Instead, the unmanned aircraft is piloted by hardware, software, and a person or people from the ground. The technical definition of “an 'unmanned aerial vehicle' is a powered aircraft that does not carry a human operator, uses aerodynamic forces to provide lift, can fly autonomously (by an onboard computer) and/or be piloted remotely (by radio control), and can be recovered for repeated flights. It is an aerial robot. Airships, aerostats, balloons, ballistic and semiballistic missiles, cruise missiles, artillery projectiles, tethered/wire guided aircraft/missiles, and other one-flight, expendable objects are not considered unmanned aircraft” (Lewis). An unmanned aircraft (UA) is also known as an unmanned aerial vehicle (UAV), unmanned aircraft system (UAS), drone, remotely piloted vehicle (RPV), remotely operated aircraft (ROA), or remotely piloted aircraft (RPA).
The Kayak is one of the most versatile man powered water craft that has ever been around on the waters of planet Earth. The kayak can be used on a small pond, large lake, calm river, raging river, or the wide open seas. There are kayak variations for every situation, and their history and development have allowed these changes to be custom made for the type of paddling that can be done. Through the proper use of gear and technique, one can become a proficient kayaker in their desired realm.
The Robotics Industry Association defines a robot as ?a reprogrammable, multifunctional manipulator designed to move material, parts, tools, or specialized devices through variable programmed motions for the performance of a variety of tasks? (Zalda 8). In short, a robot is a machine that is programmed to perform a variety of tasks in place of humans.
Autonomous cars, they are an extraordinary move in the vehicle industry! For those who do not know what autonomous cars are, they are cars that drive themself, cars that have an autopilot feature. Autonomous cars are cars of the future, there are very few as of today. One of the first are made by the Tesla company.