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Stepper Motor with Chopper Drive

The MotoDrive™ PDE captive linear actuator from Haydon Kerk Motion Solutions (Waterbury, CT) comes with an integrated chopper drive to form a compact, precision motor control system. It produces an output force of 220 Newtons (50 lb) for the single-stack version and 350 N (78 lb) for the double-stack version.

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Rotary Encoder

The RVS58S incremental rotary encoder from Pepperl+Fuchs (Twinsburg, OH) is designed for safety aligned systems up to SIL3 in accordance with IEC 61508, and Category 4 in accordance with DIN EN 954-1. It is also suited for use as a motor feedback system for safe drives in accordance with IEC 61800-5-2.

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Brushless AC Motor

The DynaMotor™ from DynaMotors (Dayton, OH) is a patented high performance brushless AC motor providing integrated control of speed, torque and direction. With innovative new solid-state light technology and high torque motor design, the DynaMotor delivers accurate control while offering advantages not possible with traditional motors. Precision speed control is provided by LED arrays controlling solid-state switches embedded in the rotor. The motor design delivers reduced installation time and costs, GFCI circuit compatibility, and the elimination of additional gearboxes or speed reducers; all with virtually zero RFI/EMI interference.

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High-Voltage Amplifier

The Model PZD700A high-voltage power amplifier from Trek Inc. (Medina, NY) addresses the need for high speed and fast settling when driving capacitive loads in piezoelectric driving/control, electro-optics, MEMS and other demanding applications such as laser modulation and ion beam control.

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Micromotor

The series 2237 DC micromotor from MicroMo Electronics (Clearwater, FL) measures 37 mm long by 22 mm in diameter. It utilizes the Faulhaber MCDC 3006 motion controller or SC 2804 speed controller. Continuous torque rating is 11 mNm. Accessories incorporating matching-diameter gearing and three-channel encoders are available.

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Stepper Drives

The Series STM from Omega Engineering Inc. (Stamford, CT) is a drive+motor+control unit, fusing step motor, drive, and controller technologies into a single device that saves space, wiring, and cost over conventional motor and drive solutions. The S models offer control options such as step and direction, analog input, joystick control, and serial host commands while the Q models add the capability of stand-alone programmable operation. Both models can be ordered with a 1000-line encoder that is integrated into the motor housing.

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Processing Images of Craters for Spacecraft Navigation

NASA’s Jet Propulsion Laboratory, Pasadena, California A crater-detection algorithm has been conceived to enable automation of what, heretofore, have been manual processes for utilizing images of craters on a celestial body as landmarks for navigating a spacecraft flying near or landing on that body. The images are acquired by an electronic camera aboard the spacecraft, then digitized, then processed by the algorithm, which consists mainly of the following steps:

Posted in: Briefs, Imaging, Physical Sciences, Mathematical models, Cartography, Imaging and visualization, Spacecraft guidance, Terrain

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