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In this study, U-model based control system design methodology is expanded into application of wind energy conversion systems, which includes formulisation of system into a standard control oriented model and reformulation of the power maximization control problem into a tracking control design for such nonlinear dynamic systems. In addition, the designed closed-loop system having pre-designed linear...
Reinforcement learning (RL) techniques have been successfully used to find optimal state-feedback controllers for continuous-time (CT) systems. However, in most real-world control applications, it is not practical to measure the system states and it is desirable to design output-feedback controllers. This paper develops an online learning algorithm based on the integral RL (IRL) technique to find...
The reliability of complex interconnect structures at all levels of the chip integration hierarchy has become a major concern due to the use of fine feature sizes, diverse materials, and complex 3D architectures. Reliability issues range from stress related failures such as dielectric cracking and interface debonding during manufacturing to electrical and mechanical failures such as electromigration...
Two side direction burrs is an important factor of influence to edge quality and performance of precision parts. A finite element model was developed for simulation of two side direction burr formation process. Based on strain distribution, a two side burr formation mechanism was proposed. Strain of Cutting lay material near the side face in two side direction of work piece is determinant factor of...
Ferroelectric ceramic materials have a wide range of applications because of their piezoelectric and pyroelectric properties. One of their most important physical properties is the specific heat. In this study, the specific heats of a series of lead-zirconate-titanate (PZT) compositions in the vicinity of the morphotropic phase boundary (MPB) were measured. The temperature range was from 1.8 to 300...
Ferroelectric ceramic materials have a wide range of applications because of their piezoelectric and pyroelectric properties. One of their most important physical properties is the specific heat. In this study, the specific heats of a series of lead-zirconate-titanate (PZT) compositions in the vicinity of the morphotropic phase boundary (MPB) were measured. The temperature range was from 1.8 to 300...
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