Speed ​​Adaptive Control System and Method for Engine Bench

Abstract

The invention provides a rotating speed adaptive control system and method for an engine pedestal. The rotating speed control system comprises a reference model module, a parameter identification feedback unit and a feedback coefficient correction module; the reference model module is used for conducting first-order filtering on a target rotating speed output by a pedestal control host computer, and the processed target rotating speed serves as a reference rotating speed target value of the rotating speed control system; the parameter identification feedback unit is used for identifying the parameter of a pedestal system, observing and compensating for the internal and external total disturbance of the pedestal system and generating a controlled quantity for the compensated system; the feedback coefficient correction module is used for correcting the feedback controlled quantity in the parameter identification feedback unit in real time. The rotating speed adaptive control system and method have the advantages that the transient rotating speed tracking performance of the engine-dynamometer pedestal system and the adaptivity of the control method are easily improved; parameters needing to be adjusted by the control method are effectively reduced, and thus the parameter adjustment time is shortened.

Description

technical field [0001] The present disclosure relates to the field of rotational speed control of common rotating devices, in particular to a rotational speed self-adaptive control system and method thereof for an engine stand. Background technique [0002] The engine-dynamometer bench system is a system that takes the engine throttle opening and the dynamometer loading torque as input, takes the engine torque and speed as output, and uses the instantaneous speed and torque to track the speed and torque curves of the test cycle respectively. Target dual-input dual-output coupling system. When the engine bench is used for transient cycle experiments, the working mode of the dynamometer to control the speed and the engine to control the torque is generally adopted. Among them, the dynamometer controller realizes the closed-loop speed by changing the loading torque. The dynamometer is connected to the engine through a coupling. The engine is a highly nonlinear time-delay syst...

AI Technical Summary

Problems solved by technology

[0003] In summary, for the nonlinear, time-delay, dual-input and dual-output coupling system composed of the engine-dynamometer, there is no control system and control method that can meet the actual application requirements.

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