Small lead-based reactor has a wide range of applications and complex and changeable operating conditions. It is difficult to achieve good control of core power by using traditional control methods. In order to solve the problem that the parameters of the traditional linear quadratic Gaussian control (LQG)/loop transmission recovery technology (LTR) controller cannot be adjusted online, the core state space model is established by using the perturbation theory, an LQG/LTR controller based on ant colony algorithm is designed, the core power cont...