Design of high-bandwidth high-precision flexure-based nanopositioning modules

An optimized nano-positioning stage for Bristol’s Transverse Dynamic Force Microscope

“…2. The flexible structural element (see for instance Polit et al (2009) for discussion on flexures) is capable of being moved in the x-y plane via two perpendicular actuator pairs. The simple schematic design of the beams is shown in Fig.…”

Conceptual designs of multi-degree of freedom compliant parallel manipulators composed of wire-beam based compliant mechanisms

“…There are several emerging approaches to design compliant mechanisms: a) the pseudo-rigid-body-model (PRBM) approach [41][42][43][44][45][46], b) the continuum structure optimization (CSO) approach [47][48][49][50], and c) the other innovative design approaches such as the constraint-based design (CBD) approach [6,25,[51][52][53], the screw theory based (STB) approach [26][27][28]54], the freedom and constraint topology (FACT) approach [29][30][31], and the building-block synthesis (BBS) approach [55,56]. Compliant mechanisms obtained using different design approaches can be classified into three categories: lumped-compliance mechanisms such as that in Li' work [43], distributed-compliance mechanisms such as that in Awtar's work [6], and hybrid-compliance mechanisms such as that in Polit's work [45].…”

“…Compliant mechanisms obtained using different design approaches can be classified into three categories: lumped-compliance mechanisms such as that in Li' work [43], distributed-compliance mechanisms such as that in Awtar's work [6], and hybrid-compliance mechanisms such as that in Polit's work [45].…”

A 2-legged XY parallel flexure motion stage with minimised parasitic rotation

“…In this section, linear matrix modelling [15,16] is implemented under small deformation assumptions for Euler-Bernoulli beams in order to the 2-legged XY CPM with minimised parasitic rotation ( Figure 3) and the 2-legged XY CPM with conventional arrangement [10] (one example is shown in Figure C.1). The compliance matrix of the latter one will be firstly investigated.…”

“…Moreover, the symmetric 4-legged design may cause relatively large lost motion (between the input motion and output motion) due to the fact that the passive P joint connected to one actuated P joint in one leg transfers loads to the rest three leg legs rather than only one leg. In addition, hybrid-compliance modules [10] were used to reduce the parasitic rotation but subject to the fact that lumpedcompliance results in small motion range and stress concentration.…”