Abstract: With the rapid development of wind power generations, the inertial response of wind turbines (WTs) are widely concerned recently, which is important for grid frequency dynamic and stability. This paper recognizes and understands the inertial response of type-3 and type-4 WTs from the view of equivalent internal voltage, in analogy with typical synchronous generators (SGs). Due to the ...

This paper describes the development of an efficient mechanical oscillator. It is capable of combining the energetic advantages of ballistic movement with cycle adjustability and active orbital control. Pneumatic artificial McKibben muscles are used as variable springs, from which the stiffness is varied in order to induce a limit cycle.

This paper presents the concept and architecture of a fatigue damage control system for mechanical structures. In contrast to the conventional cycle-based approach, fatigue damage is represented via non-linear differential equations with respect to time in the state-variable setting. This damage model is compatible with the dynamic model of the plant, i.e. the process under operation and contro...

there are instances in which it is desirable to determine relationships among fruit physical attributes. for example, fruits are often graded on the basis of size and projected area, but it may be more suitable and/or economical to develop a machine which grades by mass. therefore, a relationship between mass and dimensions or projected areas and/ or volume of fruits is needed. various grad...

In this paper, we propose a control system for object grasping tasks performed by the multifingered robot hand. Unlike previous systems, which were built using force control based on mechanical and dynamic analyses, this system is built using position control. The variable stiffness compliance control we propose is used as the grasp controller, and the system is able to perform all approach, co...

We consider Iterative Learning Control for the Furuta Pendulum nonlinear mechanical system, where goal is to learn input torque such that pendulum angle follows a reference. show linearization of considered system variable trajectory-dependent order and thus some existing solutions do not apply. propose novel method based on observability matrix inversion allowing deal with variable-order minim...

The design and use of PID controllers is a part of what has been denominated Classical Control, which as the name implies, has been studied for many years (DiStefano et al. 1996), however it continues to be a source for research (Alvarez et al. 2008), (Ang et al. 2008), (Su et al. 2010). The structure of the controller contains a differential term to aid in the reduction of system friction and ...