| Citation: | MAO Zhe, LI Shuanggao, XU Yan, et al. A difference measurement points planning method for large-scale surface of aircraft[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(5): 1024-1031. doi: 10.13700/j.bh.1001-5965.2019.0334(in Chinese)
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Digital measurement technology has been gradually applied in aircraft large-scale component measurement, which also brings about many issues, and the fundamental one is how to plan the number and layout of measurement points to well describe the curve or surface. Aimed at solving the issue of complicated curve or surface measurement points planning, a novel difference measurement points planning method based on deterministic representation is proposed. The curve's deterministic representation is acquired by using Non-Uniform Rational B-Splines (NURBS) theory, and the particle swarm optimization is adopted to optimize the control points and corresponding weights factors to construct the high-precision fitting curve. Two different measurement point planning strategies considering curvature and measurement uncertainty are designed, and combined with surface characteristics, a complete and high efficiency measurement point planning process is constructed. The measurement points planning algorithm proposed in this paper is programmed based on the CAA, and by taking test piece as experiment object, the feasibility of the algorithm and the effectiveness of the system are verified.
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