Established in 1992, China Qiangjin Power Co., Ltd. is a professional ultrasonic generator manufacturer and dealer of in the emergency power supply industry. We not only specialize in manufacturing different kinds of generators, but also in motors, engines, diesels, gearmotors and other power supply products. Now, our OEM ultrasonic generators products are exported to North America, Europe(UK, France, Germany, Italy), USA, Japan and Canda. Our company has obtained the certifications of ISO9001-2000, GS/TUV, CE, VL, EPA, QHS, SON, CAP and SRS.

Image stabilisation was available for camcorders long before it was introduced in EF lenses. Both electronic and optical systems were available, but size or weight constraints meant that neither was suitable for EOS cameras. So Canon went back to the drawing board and took a fresh look at the problem.
Its solution is a group of elements inside the lens that moves perpendicular to the lens axis. The movement of this special lens group is controlled by an on-board microcomputer and counteracts the shaking of the camera. PUM can achieve high precision as a result of low speed, its lack of gears and transmissions, and the freedom it affords from backlash. They are quite simple mechanically, consisting of a single moving part that provides the same functionality as motor, transmission, and brake in a conventional motor-driven system.

ABSTRACT—The next generation of robotic spacecraft will require simple, reliable, and lightweight robotic manipulators. This research enabled a new class of robotic actuators by successfully producing a prototype real-time model-based torque control system for a piezoelectric ultrasonic motor. Piezoelectric ultrasonic motors (PUMs) offer dramatic improvements to a variety of space-based robotics applications, if the problem of real-time torque control can be solved. This research used the UHCL PUM laboratory apparatus to develop, implement, and experimentally validate a real-time model-based PUM torque control law.
Space-based robots typically require actuators with the advantages of high precision, light weight, and simplicity. Piezoelectric ultrasonic motors (PUM) are well-suited to these requirements.