The application discloses a performance optimization method for a heavy
machine tool hydrostatic guide rail
system, comprising the following steps: S1. establishing a multi-objective optimization model: determining design variables of the hydrostatic guide rail
system X , constructing an optimization objective function F(X) , and establishing an equality constraint based on force and torque balance H(X and an inequality constraint for preventing
dry friction G(X) ; S2. constructing a multi-fidelity
database: obtaining a high-fidelity
data set through high-fidelity numerical
model simulation, and obtaining a low-fidelity
data set through low-fidelity numerical
model simulation with the same calculation logic but a lower
grid density; S3. constructing a data fusion prediction model: utilizing the high-fidelity
data set and the low-fidelity data set, constructing a collaborative
Kriging surrogate model based on an autoregressive structure, and outputting a predicted mean and a predicted variance; S4. generating a candidate solution
population; S5. multi-criteria point selection; S6. simulating and updating a Pareto frontier solution set; and S7. repeating steps S3 to S6 until a preset convergence condition or a calculation budget is met, and outputting a final
Pareto optimal solution set.