Xem 1-12 trên 12 kết quả Motorized wheels
  • That's the way to do it! Whoop her up, Andy! Shove the spark lever over, and turn on more gasolene! We'll make a record this trip." Two lads in the tonneau of a touring car, that was whirling along a country road, leaned forward to speak to the one at the steering wheel. The latter was a red-haired youth, with somewhat squinty eyes, and not a very pleasant face, but his companions seemed to regard him with much favor. Perhaps it was because they were riding in his automobile. "Whoop her up, Andy!" added the lad on the seat beside the driver. "This is immense!" "I rather thought...

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  • Position of Pneumatic Cylinders Position in Robotics Applications Speed and Position of Bearings Speed and Position of Electric Motor Shafts General Field Detection in Implantable Medical Devices Wheel Speed Sensing for ABS Brake Applications Transmission Gear Speed Sensing for Shift Control Low Field Detection in Currency Applications Current Sensing in PCB Traces and Wires Overcurrent and Short Circuit Detection Vehicle Detection for Traffic Counting Applications

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  • As already stated, a road vehicle on pneumatic tires cannot maintain a given trajectory under the effect of external perturbations unless managed by some control device, which is usually a human driver. Its stability solely involves such state variables as the sideslip angle β and the yaw velocity r. In the case of two-wheeled vehicles the capsize motion is intrinsically unstable forcing the driver not only to control the trajectory but stabilize the vehicle. A possible scheme of the vehicle-driver system is shown in Fig. 27.1.

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  • The collective load is the basis for determining the average speeds (2,387 min–1) and the average driving speed (111 km/h). For each of the load cases the tooth load acting on the pinion and the reaction loads from the bearings have to be calculated both for forward and backward motion (percentage times 50 % each). In addition to these forces, the bearings are subjected to loads due to the rotor weight, the unbalanced magnetic pull, unbalanced loads and rail shocks. Of these loads only the rotor weight, GL, is known; therefore, it is multiplied by a supplementary factor fz = 1.5...2.

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  • Two-axle vehicles without trailer Low speed or kinematic steering is, as already stated, defined as the motion of a wheeled vehicle determined by pure rolling1 of the wheels. The velocities of the centres of all the wheels lie in their midplane, that is the sideslip angles αi are vanishingly small. In these conditions, the wheels cannot exert any cornering force to balance the centrifugal force due to the curvature of the path. Kinematic steering is possible only if the velocity is vanishingly small.

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  • A vehicle on elastic suspensions may be modelled as a system made by a certain number of rigid bodies connected with each other by mechanisms of various kinds and by a set of massless springs and dampers simulating the suspensions. A vehicle with four wheels can be modelled as a system with 10 degrees of freedom, six for the body and one for each wheel. This holds for any type of suspension, if the motion of the wheels due to the compliance of the system constraining the motion of the suspensions (longitudinal and transversal compliance of the suspensions) is neglected....

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  • Cars should roll easily across a smooth floor or down a cardboard or wooden ramp propped up on stairs. If not, check that the wheels are free to turn (the wheels aren’t rubbing on the chassis and the axles aren’t rubbing on the bearings) and that the axles are parallel. Building a small fleet of these cars provides opportunities to race them, either for speed down a ramp or for distance from the base of the ramp to the far reaches of the classroom or gym. Add weights (fishing weights, metal washers, etc.) to see if the cars perform better. Measure and record each trial run.

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  • Select the correct instructions for the actions in Figure 4.1: For example: A = 2 1. Turn the jack handle anticlockwise to lower the car. 2. Turn the gear wheel anticlockwise to raise the drill. 3. Turn the bolt clockwise to tighten it. 4. Press the top button to stop the motor. 5. Press the largest pedal to stop the car. 6. Pull the handle down to cut the metal bar. 7. Push the bar down to raise the load

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  • Moving parts in machinery involve relative sliding or rolling motion. Examples of relative motion are linear sliding motion, such as in machine tools, and rotation motion, such as in motor vehicle wheels. Most bearings are used to support rotating shafts in machines. Rubbing of two bodies that are loaded by a normal force (in the direction normal to the contact area) generates energy losses by friction and wear.

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  • Moving parts in machinery involve relative sliding or rolling motion. Examples of relative motion are linear sliding motion, such as in machine tools, and rotation motion, such as in motor vehicle wheels. Most bearings are used to support rotating shafts in machines. Rubbing of two bodies that are loaded by a normal force (in the direction normal to the contact area) generates energy losses by friction and wear. Appropriate bearing design can minimize friction and wear as well as early failure of machinery...

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  • The Driving Mechanism works the same as the Steering Mechanism. When a command is received to go forwards the SCRX2BC creates a voltage at pin 11 which turns on Q2. This then turns on Q5 and Q8 and current flows from the batteries through Q5, then through the driving motor, and then through Q8 to ground. Similarly to go backwards the voltage is created at pin 10, and Q3, Q6, and Q7 are turned on. The small gear on the Motor drives the Middle Gear, which drives the gear on the rear wheels axle, making the wheels move. Note that the gears on the Motor...

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  • The report highlights the best practices from five successful microfinance institutions in Africa. While they are all different in how and where they operate, they are among the most successful microfinance institutions in Africa and share some common traits. They know their clients – the poor in urban slums or in hard-to-reach rural areas – and have tailored their operations to reach them where they live and offer the most appropriate services. They reach their clients by public buses in South Africa, motor scooters in Togo and banks-on-wheels in Mozambique.

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