By Tan Kok Kiong, Huang Sunan
Modeling and regulate of Precision Actuators explores new applied sciences which may finally be utilized in a myriad of industries. It covers dynamical research of designated actuators and methods of layout for varied keep watch over functions. The e-book addresses 4 major schemes: modeling and keep watch over of specified actuators; nonlinear regulate of targeted actuators, together with sliding mode keep watch over and neural community suggestions keep an eye on; fault detection and fault-tolerant keep an eye on; and complex air bearing keep an eye on. It covers software matters within the modeling and regulate of specific actuators, delivering a number of attention-grabbing case reviews for extra application-oriented readers.
- Introduces the riding forces at the back of certain actuators
- Describes nonlinear dynamics of targeted actuators and their mathematical types, together with hysteresis, creep, friction, and strength ripples
- Presents the keep an eye on suggestions for targeted actuators in line with Preisach version in addition to creep dynamics
- Develops relay suggestions thoughts for choosing nonlinearities corresponding to friction and strength ripples
- Discusses a MPC strategy in line with piecewise affine versions which emulate the frictional results within the designated actuator
- Covers the techniques of air bearing levels with the corresponding keep watch over method
- Provides a suite of schemes compatible for fault detection and lodging keep watch over of mechanical systems
Emphasizing layout conception and keep an eye on recommendations, the ebook contains simulation and sensible examples for every bankruptcy; covers distinct actuators similar to piezo cars, coil vehicles, air bearing cars, and linear cars; discusses integration between various applied sciences; and comprises 3 case reviews in actual initiatives. The ebook concludes by means of linking layout equipment and their purposes, emphasizing the main matters concerned and the way to enforce the precision movement regulate initiatives in a pragmatic procedure. It presents a concise and finished resource of the cutting-edge advancements and effects for modeling and regulate of specific actuators.
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Extra info for Modeling and Control of Precision Actuators
Bunch and Nielsen provided some methods of SVD revision and updating . Brand applied a rank 1 modification to movie recommender systems . In this section, the identification revision is based on the initial values A0 and Y0 in the previous section. 13) where Y0 is a vector and y1 is a scalar. Let M0 and M1 denote A0T A0 and A0T A0 + a 1T 11 , respectively. 1, the initial estimation is written as M0 = Ur r VrT + εr , εr is the residual error. 21). The SVD of the small matrix K can save computing time, compared to the SVD of the large matrix M1 .
Based on accurate identification of hysteresis, this chapter uses Preisach-based inversion feedforward to enhance the tracking performance. 5 Tracking errors. (a) Preisach-based inversion feedforward control. (b) Composite control. PAs. u f b denotes the feedback control signal. The measurement noise is also considered. 3 Simulation Study of Proposed Compensation Strategy The proposed compensation strategy is simulated in this section. 3 are used. Moreover, the output disturbance of 5 µm is also added to the system.
As the reference frequency increases, the feedback controller also suppresses the dynamic effects. The feedback controller design is not the key issue in this chapter. Thus, a PID controller is employed. The techniques of the PID controller and its tuning are mature. Theoretical analysis, such as stability analysis, and experimental tests of PID controllers have been applied in piezo systems [14,26], but the tracking performance is still limited due to the hysteresis effect. Based on accurate identification of hysteresis, this chapter uses Preisach-based inversion feedforward to enhance the tracking performance.