Motion-capturing pressure-sensitive paint (PSP) methods give a pressure map over an unsteady aerodynamic surface. To collect a quantitative pressure measurement using this method, unsteady analysis is important. Due to the unsteady motion of an aerodynamic surface, the luminescent output acquired by a stationary imaging device is a time-dependent value. This creates a time-dependent change in signal-to-noise ratio. An uncertainty analysis is given based on the signal-to-noise ratio of the luminescent output. Unsteady surface pressure over a high aspect-ratio (YXX) wing with 11.5% thickness ratio at 30% chord is considered for analysis. Under Mach 0.8 flow, the YXX wing flutters at 13.7 Hz with a shock oscillation over the surface. With the proposed uncertainty analysis, the overall pressure uncertainty, based off of traditional unsteady pressure taps, of the PSP measurement is given as 3.5 [%]. The measurement region that gives the high signal-to-noise ratio had uncertainty as low as 2.9 [%].

运动捕捉压敏涂料（PSP）方法可在不稳定的空气动力学表面上提供压力图。为了使用此方法收集定量压力测量值，不稳定分析很重要。由于空气动力学表面的不平稳运动，由固定成像设备获得的发光输出是随时间变化的值。这会导致信噪比随时间的变化。根据发光输出的信噪比给出了不确定性分析。考虑在高纵横比（YXX）机翼上的非稳定表面压力，其弦比为30％时为11.5％。在0.8马赫的流量下，YXX机翼以13.7 Hz的频率颤动，并在表面上产生冲击振荡。通过提出的不确定性分析，整体压力不确定性，基于传统的非恒定压力抽头，PSP的测量值为3.5 [％]。给出高信噪比的测量区域的不确定度低至2.9 [％]。