LMAS discards fixed shop floor layouts and follows a so-called clean floor approach, which provides a sizeable, coherent shop floor space. The concept of Line-less Mobile Assembly Systems (LMAS) can address new product variants by rapidly reconfiguring assembly stations by integrating mobile resources such as mobilized assembly robots and automated guided vehicles. The assembly of large-scale products is also affected by fluctuating demands and increasing number of variants, which enforces the wish of more flexible assembly systems. airplane, energy systems and maritime engines industry) show that for example tolerances of 1 mm are common for nominal dimensions of up to 30 m. Schmitt defines the term large-scale product by the relatively small ratio of tolerance and nominal dimension, leading to complex challenges and problems in the production. by applying the concept of measurement assisted assembly. This results in a high depth of added value, which in turn leads to the requirement to produce large components “First-Time-Right” e.g. The assembly of large-scale products is characterized by a high level of effort in terms of logistics and the set-up processes. Experiments show the validity of the virtual indoor-GPS which can be used as a planning tool for metrology system setups within Line-less Mobile Assembly Systems. This work presents a novel approach for a virtual indoor-GPS to determine measurement uncertainties during a process and to evaluate the measurement process capability.

Virtual measurements simulate measurement processes and model dependencies between the environment and the metrology system. To be able to validate positioning tolerance requirements of an assembly process, measurement uncertainties must be determined. The measurement uncertainty of such a system depends on the spatial distribution of the transmitters and the receiver positions.

An indoor-GPS, as a distributed large-scale metrology system, is able to cover a wide shop floor area and to obtain positioning data with uncertainties in the submillimeter range. There is a need for more accurate positioning data to locate and navigate mobile assembly resources. Associated challenges are accurate spatial referencing between mobile resources to meet assembly tolerance requirements. The clean floor approach discards fixed anchor points, so that assembly resources such as mobile robots and automated guided vehicles transporting products can adapt to new products and form new processes. In Line-less Mobile Assembly Systems, the mobilization of assembly resources and products enables rapid physical system reconfigurations to increase flexibility and adaptability.

How to measure in expert gps