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Microgrippers driven by piezoelectric actuators have been widely applied in various fields demanding high accuracy. However, it is challenging to achieve a higher precision due to the presence of hysteresis and disturbances. This brief presents a new approach to achieve a precision motion control by overcoming the mentioned problems. The reported solution is derived by integrating three main components,...
This paper reports on the design and control of a novel large-range micro-injector which is used for biological cell micro-injection. The device is actuated by one smart piezoelectric (PZT) actuator. The injector can not only provide the large-range displacement but also a tiny shape that can be assembled under the usual microscope system conveniently. The output of the device is amplified by a bridge-type...
Microgripper driven by piezo-actuator plays an important role in various fields because of its highly accuracy. Nowadays, precise position control has been achieved through different approaches. However, precision position and force control is always a critical issue for automated microassembly systems to handle micro-objects delicately. The existing difficulties come from external disturbances, such...
The microgripper actuated by piezoelectric actuator (PEA) is a typical micromanipulator. In order to control it to attain exact position, a good adaptiveness and robustness against disturbance should be guaranteed. However, because of the nonlinear hysteresis in the PEA and other disturbance such as drift, it is not an easy assignment to get an accurate position control. Another difficulty lies in...
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