Improved high-speed PID chassis dynamometer method

The invention discloses an improved high-speed PID chassis dynamometer method, which is characterized in that a constant-speed PID algorithm is processed, a section of PID is divided into two sections of complementary PID algorithms for control, when the force controlled by the first PID reaches a peak value, a second set of PID algorithm is started for reverse adjustment, and oscillation generated by the two sets of PID counteracts each other, so that on the premise of ensuring the control response speed, the power of the chassis can be accurately measured. Finally, the target that only one adjusting peak value is not subjected to subsequent oscillation adjustment is achieved. By adopting the PID control algorithm, the constant-speed control speed of the chassis dynamometer can be obviously improved, the rotating speed of the roller can be quickly stabilized, the variable-load sliding control precision is improved, the engine power test precision is improved, and the test efficiency of a detection station is