Method and system for evaluating health state of fuel gas injection valve of marine LNG (Liquefied Natural Gas) engine and ship

The invention belongs to the field of ships and ships or other water ships and ship equipment, and discloses a ship LNG engine fuel gas injection valve health state evaluation method and system, and a ship. The ship LNG engine fuel gas injection valve health state evaluation method comprises the steps that a pressure fluctuation signal of a gas supply pipe is obtained; performing filtering processing on the pressure signal by using an IWOA-SVR-EEMD algorithm to obtain a noise-reduced and filtered pressure signal; estimating a kernel parameter and a penalty factor of a support vector regression algorithm by using an improved whale optimization algorithm; extending the signal sequence by using the support vector regression algorithm after the kernel parameter and the penalty factor are obtained; decomposing the extended signal sequence by using an ensemble empirical mode decomposition method to obtain an intrinsic mode component imf; calculating a Pearson product-moment correlation coefficient of each intrinsic