Acceleration inertia electric simulation control method for test bench of automobile transmission system

Abstract

The invention discloses an acceleration inertia electric simulation control method for a test bench of an automobile transmission system. The method includes the steps of 1) according to inherent parameters of an engine, establishing an engine "throttle opening-speed-torque" model; 2) loading a torque type to a drive motor, and then acquiring the speed and torque of an output half shaft of a transmission; 3) respectively establishing a wheel rolling resistance torque model, a slope resistance torque model and an air resistance torque model during the driving process of an automobile; 4) obtaining the following shown in the description; 5) for a sufficiently small test instruction cycle, obtaining ns(k+1)=ns(k)+<delta>ns, and loading the speed ns(k+1) onto a load motor; and 6) repeating the steps 2) to 6) to complete the automobile acceleration inertia electric simulation. The method can be used to accurately simulate the dynamic condition of the automobile, so as to effectively improve the accuracy of the automobile transmission system test.

Description

technical field [0001] The invention relates to a method for dynamically simulating the load of an automobile transmission system test bench under driving conditions, in particular to an electric simulation control method for acceleration inertia of an automobile transmission system test bench. Background technique [0002] The dynamic load simulation technology of automobile road conditions is a key technology for simulating driving conditions such as starting, acceleration (deceleration) and dynamic shifting of automobiles on an indoor test bench. The dynamic test of the powertrain requires that the bench system can simulate the load of the working condition similar to that of the real vehicle on the road, so as to test the parameters in the actual work of the automobile powertrain assembly. In order to truly reproduce the driving conditions of the car, the speed and acceleration of the load motor must be consistent with the actual road conditions of the wheels on the indo...

AI Technical Summary

Problems solved by technology

[0003] Compared with the inertial mechanical simulation method, the inertial electric simulation method is to remove the inertial flywheel part on the test bench. In addition to the moment of inertia of the bench itself, the inertial resistance moment to be simulated is completely compensated by the electromagnetic torque of the dynamometer. The method solves the problem of inconvenient installation of the mechanical inertia wheel, but puts forward higher requirements for the control strategy and control algorithm of the load simulation system

Images