A Miniature Pan Tilt Actuator the Spherical Pointing Motor
A Miniature Pan Tilt Actuator the Spherical Pointing Motor
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In our eReader you can find the full English version of the book. Read A Miniature Pan Tilt Actuator the Spherical Pointing Motor Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Miniature Pan Tilt Actuator the Spherical Pointing Motor
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To quickly assess the difficulty of the text, read a short excerpt:
We call this the fixed percentage control method.
A second slightly more complicated open-loop control strategy based on traditional stepper motor control theory yields better results. The idea, called the two step method, is based on the fact that the SPM rotor oscillates with an approximately constant period. We first step the motor to a point midway between the initial and destination positions. This midpoint is determined from the calibration results of Section 5. We then wait for the ringi...ng velocity to be zero at which point we apply a second step to hold the rotor at this position of zero velocity. The energy of the ringing will be largely dissipated, and the rotor will be at the destination position. Although, we don't know exactly when to apply the second step, we can estimate it by waiting half the period of oscillation. This assumes that the period of oscillation is constant, which is not true, but is a close approximation. In practice, because neither the midpoint nor the time at which the currents are changed are exactly correct, not all of the ringing energy is dissipated, and a little ringing of the same period remains, but with vastly reduced amplitude.
What to read after A Miniature Pan Tilt Actuator the Spherical Pointing Motor?
You can find similar books in the "Read Also" column, or choose other free books by Benjamin Bederson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
We call this the fixed percentage control method.
A second slightly more complicated open-loop control strategy based on traditional stepper motor control theory yields better results. The idea, called the two step method, is based on the fact that the SPM rotor oscillates with an approximately constant period. We first step the motor to a point midway between the initial and destination positions. This midpoint is determined from the calibration results of Section 5. We then wait for the ringi...ng velocity to be zero at which point we apply a second step to hold the rotor at this position of zero velocity. The energy of the ringing will be largely dissipated, and the rotor will be at the destination position. Although, we don't know exactly when to apply the second step, we can estimate it by waiting half the period of oscillation. This assumes that the period of oscillation is constant, which is not true, but is a close approximation. In practice, because neither the midpoint nor the time at which the currents are changed are exactly correct, not all of the ringing energy is dissipated, and a little ringing of the same period remains, but with vastly reduced amplitude.
What to read after A Miniature Pan Tilt Actuator the Spherical Pointing Motor?
You can find similar books in the "Read Also" column, or choose other free books by Benjamin Bederson to read onlineMoreLess
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