Test bed state point simulation control method

Abstract

The invention discloses a test bed state point simulation control method comprising the steps that 1) control quantity of a single parameter is calculated through an air intake system and an air exhaust system state point parameter equation set used for regulating air environment pressure in a simulation cabin according to difference values of state point parameters in the air intake system and air environment pressure in the simulation cabin of a current state point and set values of the state point parameters in the air intake system and air environment pressure in the simulation cabin of a required simulation state point; 2) all valve opening of the parameters is regulated and controlled according to the control quantity of the single parameter calculated in the step 1) so that all the valve opening is set to meet the control quantity of the single parameter calculated in the step 1) at the beginning of the next cycle; and 3) the step 1) and the step 2) are repeated until simulation precision meets the requirements. Compared with methods in the prior art, engine test time is shortened, test cost is reduced and test efficiency is enhanced by the test bed state point simulation control method.

Description

technical field [0001] The invention relates to a state point simulation control method of a test vehicle, in particular to a direct connection type test vehicle state point simulation control method. Background technique [0002] At present, during the engine test, a set of parameters are required, including intake air total pressure, intake air flow rate, intake air oxygen composition, intake air total temperature, engine fuel supply, and air ambient pressure, which are called state points, and at the same time reach After setting the value and stabilizing, record its performance and parameters or assess its performance. This group of parameters is generally controlled by a single parameter automatic closed-loop control method. However, due to the coupling relationship between the state point parameters, and the aerodynamic load and temperature measurement include inertial links, the single parameter automatic closed-loop control method will cause repeated oscillations of ...

AI Technical Summary

Problems solved by technology

This group of parameters is generally controlled by a single parameter automatic closed-loop control method. However, due to the coupling relationship between the state point parameters, and the aerodynamic load and temperature measurement include inertial links, the single parameter automatic closed-loop control method will cause repeated oscillations of parameters, resulting in simulation time is hard to control

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