Design Rules for Actuators in Active Mechanical Systems by Oriol Gomis-Bellmunt

By Oriol Gomis-Bellmunt

In energetic mechanical platforms (mechanisms or constructions) the potential for a coupling among energetic and passive components at an early level of the layout procedure is changing into progressively more major. with a purpose to combine actuators in initial layout methods, or in a multidisciplinary optimization method, trustworthy versions of the actuator functionality (actuator strength and stroke, loading curves, energy restrict, quantity and mass particular paintings and gear, frequency variety, potency) as a functionality of the layout parameters and variables (actuator precept, measurement of the actuator point) are invaluable.

Design principles for Actuators in energetic Mechanical Systems offers with the formula of model-based layout principles for use within the belief of optimized mechatronic and adaptronic platforms. The publication addresses the comparability of alternative actuator periods for given purposes and gives solutions to the subsequent questions:

• what's the dating among actuator geometry and first output quantities?

• How scalable are actuators in keeping with a similar principle?

• How are vigorous output amounts (work and tool) relating to mechanical load and geometry?

• How should still actuators be designed and sized to acquire the easiest functionality for the selected actuator variety, and for a given application?

Design ideas for Actuators in energetic Mechanical Systems could be of use to execs, equivalent to actuator and computing device designers, in addition to to researchers and scholars of mechanical engineering, mechatronics, and electric engineering.

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Extra info for Design Rules for Actuators in Active Mechanical Systems

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The first step of the geometry analysis is the identification of a global representative length which defines the actuator size and of an appropriate number of aspect ratios which relate the actuator size to a corresponding number of reference lengths along different axes. The further geometrical variables are then related to the reference lengths on the same axis by additional non-dimensional variables. In most cases, these additional variables express the relationship between an active length, area or quantity of active material to the length, area or quantity of a passive component.

The application to solid-state actuators will be the topic of Chapter 6. 2 Performance Indexes Before explaining the actuator design analysis philosophy in more detail, we will shortly review some published results on actuator performance indexes, which somehow represent the state of the art on the issue of quantitative comparison of different actuator class and principles. As a rule, published performance indexes of actuators are based on statistical methods, with the exception of solid-state actuators for which a model-based analysis is quite straightforward and customary.

With the design analysis described later in the chapter we aim to provide a novel contribution to this topic by extending model-based techniques to conventional actuator principles. The data presented in this section are taken from [5, 4, 11], where the reader can find more details on the definition of the used performance indexes and on how the quantitative results were obtained. The basic characteristics of actuators are well defined as the stress σ and the strain ε. As stress and strain apply for a broad range of actuator sizes, for a specific application it is common to use the force F and displacement or stroke x.

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