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Pneumatic servo actuators have the benefits of lowcost, cleanliness and a high power-to-weight ratio. However they have poor accuracy and low inherent frequency according to the compressibility of the working media, air, and the large static and Coulomb friction. This paper presents a control strategy for two-degree-of-freedom pneumatic trajectory tracking system. For each single axis, disturbance...
A 3-DOF robot based on inchworm-type motion mechanism is presented for miniature endoscope inspection. The robot is actuated with pneumatic artificial muscle and clamped by two air chambers. The dynamic model of the robot is built. In order to solve the problems of low stiffness and the nonlinear movement characteristic of the robot system, a fuzzy wavelet neural network (FWNN) controller is proposed...
The rapid development of the network technology, especially that of the fieldbus, is changing the traditional control system. In order to solve the problem of the linkage synchronization and the network data transmission of the Multi-Ac Servo system, we recently designed a CAN bus protocol named CANServo. It is a high-level protocol of CAN bus , it is used to replace traditional parallel data transmission...
Abstract-Because the request to the quality of cold rolling sheet strips is higher and higher, the hydraulic AGC (Automatic Gauge Control) has been a requisite means for improving the quality of cold rolling strips' finished products. But the PID control strategy, being comprehensively used in the locale, is difficult to satisfy the request of improving the control precision of cold rolling mill,...
Pitch-regulated mechanism servo of wind turbine system is a slow time-variable nonlinear system. According to the requirement of the 1 MW wind turbine with variable speed and constant frequency, the parameters of its PID controller need to be learned or adjusted at real time. Therefore, we design this neural net PID controller based on the Hebbina supervised learning algorithm to realize the self-study...
Based on research of abroad wind technique, analyzing structure of wind turbine electrical pitch-adjust servo, designed the three-phase synchronous servo to act electrical pitch-adjust. According the actual results, the designed servo has well characteristics and dynamic response.
This paper presents sliding mode control with integral compensation and fuzzy tuning for hydraulic flight motion simulator servo system, which is highly nonlinear in nature with large parameter variations and severe load coupling among channels. The proposed control consists of an equivalent control for assigning desired sliding eigenvalues of the nominal closed-loop system, a switching control for...
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