CN106646041A - Engine start initial engaging surge voltage simulation method - Google Patents

Engine start initial engaging surge voltage simulation method Download PDF

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Publication number
CN106646041A
CN106646041A CN201611124416.XA CN201611124416A CN106646041A CN 106646041 A CN106646041 A CN 106646041A CN 201611124416 A CN201611124416 A CN 201611124416A CN 106646041 A CN106646041 A CN 106646041A
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China
Prior art keywords
voltage
surge voltage
signal
initial engagement
engine
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CN201611124416.XA
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CN106646041B (en
Inventor
申晓彦
阴晋冠
龚思扬
郭佳旭
肖维
杨薇
曹春芳
姚素娟
杨国华
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China North Engine Research Institute Tianjin
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China North Engine Research Institute Tianjin
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

The present invention provides an engine start initial engaging surge voltage simulation method. The diesel engine hardware-in-loop test system of the dSPACE company is taken as a platform, a power model is designed in the Matlab Simulink environment, and the model is downloaded to the dSPACE diesel engine hardware-in-loop test system so as to realize that the model drives the test system and output the initial engaging surge voltage. Compared to the prior art, the engine start initial engaging surge voltage simulation method is simple in model structure and easy to realize, can simulate the start surge voltage in the true environment, and is suitable for the test verification of the early-phase design phase; and moreover, the engine start initial engaging surge voltage simulation method has the expandability and can satisfy the different requirements for the surge voltage amplitudes and the rates of change under different loads through correction of the model and the corresponding parameters.

Description

A kind of engine starts the analogy method of initial engagement surge voltage
Technical field
The invention belongs to electric control system of diesel engine technical field, more particularly, to a kind of engine initial engagement is started The analogy method of surge voltage.
Background technology
The steady state working voltage of engine is generally 16V -32V, in Starting Process of Diesel Engine, due to starter motor, dashes forward Plus load, it may appear that surge voltage in short-term, i.e. supply voltage can suddenly drop to 6V or so, then recover again at short notice Normally.To avoid causing engine starting failure because of the impact of surge voltage, simulated firing surge under the test environment is needed Voltage, to carry out sufficient verification experimental verification to electronic control circuit, to guarantee the reasonability and validity of circuit design.
At present, scope adjustable voltage-stabilized power supply is adopted laboratory more, manually adjust come the uprushing of analog power voltage, Anticlimax.The rate of change of manual adjustment, compared with the surge voltage under actual environment, difference is larger, and uniformity is poor, it is impossible to Meet actual tests checking demand.
This is accomplished by the analogy method of the diesel engine starting surge voltage of a workable, easy realization to meet electricity The testing requirement of the process of the test of control system design circuit.
The content of the invention
In view of this, it is contemplated that proposing that a kind of engine starts the analogy method of initial engagement surge voltage, to fill Divide ruuning situation of the checking electric-control system in engine startup.
To reach above-mentioned purpose, the technical scheme is that what is be achieved in that:
A kind of engine starts the analogy method of initial engagement surge voltage, comprises the following steps:
1) clear and definite engine starts the change of initial engagement surge voltage and requires, determines each relevant parameter;
2) with dSPACE diesel engine hardware-in―the-loop test systems as platform, under Matlab Simulink environment, design electricity Source model;
3) require according to voltage change, the parameter value or parameter area of each variable of power source model is set;
4) parameter of power source model is set under the integration environment of dSPACE test systems, and is compiled, is downloaded;
5) under dSPACE test systems, by being input into firing switch signal, the simulation of initial engagement surge voltage is realized Output, and the parameter value of power source model is suitably adjusted to meet actual demand.
Further, step 1) engine start initial engagement surge voltage running parameter include steady state voltage value, Initial engagement surge voltage value, initial engagement surge voltage duration, starting voltage minimum of a value, duration of starting.
Further, step 2) in power source model include:
Firing switch acquisition module, for detecting to the firing switch signal that dSPACE test systems are exported, and will The switching signal value for detecting is transmitted to the state change logic module;
Steady state voltage signaling module, for making dSPACE test systems export steady state voltage signal, and by the steady state voltage Signal transmission is to the state change logic module;
Climbing speed control module, for by arranging timeticks, making voltage according to certain increasing law, realizes short Rapid increase in time, and state change logic module is arrived in change voltage signal output;
State change logic module, realizes following logic:(1) when rising of receiving that the firing switch acquisition module sends During dynamic switch closure signals, output voltage drops to initial engagement surge voltage value;(2) when initial engagement surge voltage continues Interior, output voltage rises to starting voltage minimum of a value according to special certain rule, and keeps within the starting time;(3) after starting, In duration of starting, output voltage rises to steady-state value and keeps stable according to certain rule;(4) it is defeated under normal condition Go out voltage and keep steady-state value.
Further, the firing switch acquisition module includes manual input switches control signal, through Boolean function Effect, by dSPACE data signals IOB firing switch signal is exported.
Further, the steady state voltage signaling module includes voltage output module and current output module, wherein, it is described Voltage output module includes that input voltage enables signal and steady state voltage control signal, sequentially passes through switch and selects function, gain The effect of function, by dSPACE power supply voltage signals IOB steady state voltage signal is exported;The current output module includes defeated Enter electric current and enable signal and limit value current controling signal, sequentially pass through switch and select function, the effect of gain function, by dSPACE Power current signal IOB exports limit value electric current.
Further, the climbing speed control module includes on the basis of default timeticks, sequentially passing through index Function, amplitude qualified function, gain function, the effect of delay function, realize expected climbing speed control.
Further, step 5) the dSPACE test systems are by ControlDesk softwares, by Matlab power supply moulds Type is connected with test system hardware, realizes providing firing switch signal by test system, and initially nibbles to electric-control system output Close surge voltage.
Compared to prior art, the present invention has the advantage that:
(1) model structure simply, is easily realized;
(2) engine that can be simulated under true environment starts surge voltage, it is adaptable to which the test of earlier design phase is tested Card;
(3) with extensibility, by changing model and corresponding parameter, can realize under different loads to surge voltage The different requirements of amplitude, rate of change.
Description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the starting surge voltage oscillogram described in the embodiment of the present invention;
Fig. 2 is the starting surge power source model described in the embodiment of the present invention;
Fig. 3 is the firing switch acquisition module described in the embodiment of the present invention;
Fig. 4 is the steady state voltage signaling module described in the embodiment of the present invention;
Fig. 5 is the climbing speed control module described in the embodiment of the present invention;
Fig. 6 is that the engine described in the embodiment of the present invention starts initial engagement surge voltage schematic diagram.
Specific embodiment
It should be noted that in the case where not conflicting, the embodiment and the feature in embodiment in the present invention can phase Mutually combination.
Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
A kind of engine starts the analogy method of initial engagement surge voltage, comprises the following steps:
1) determine that engine starts each relevant parameter of initial engagement surge voltage, as shown in figure 1, such as the present embodiment Parameter include steady state voltage be 24V, initial engagement surge voltage be 6V, the initial engagement surge voltage duration be 1s, start Magnitude of voltage is 16V, duration of starting is 5s;
2) with dSPACE test systems as operation platform, under Matlab Simulink environment, as shown in Fig. 2 design electricity The modules of source model:Firing switch acquisition module, steady state voltage signaling module, state change logic module, climbing speed Control module,
The firing switch acquisition module, for detecting to the firing switch signal that dSPACE test systems are exported, And the switching signal value for detecting is transmitted to the state change logic module;The firing switch acquisition module includes switch Control signal, Boolean function, dSPACE data signal IOBs, as shown in Figure 3;
The steady state voltage signaling module, for making dSPACE test systems export steady state voltage signal, and by the stable state Voltage signal is transmitted to the state change logic module;The steady state voltage signaling module includes voltage output module and electric current Output module, the voltage output module includes that voltage enables signal, steady state voltage control signal, switch and selects function, gain Function, dSPACE power supply voltage signal IOBs;The current output module includes that electric current enables signal, limit value current control letter Number, switch select function, gain function, dSPACE power current signal IOBs;As shown in figure 4, steady state voltage signaling module Simulated by Switcn functions and proportion function etc.;
The climbing speed control module, it is real for by arranging timeticks, making voltage according to specific increasing law Rapid increase in the existing short time;Including timeticks, exponential function, amplitude qualified function, gain function, delay function;Such as Shown in Fig. 5, simulated by Clock clock functions, Delay delay functions, Saturation functions etc.;
The state change logic module realizes following logic:(1) when firing switch closure is detected, voltage drops to Initial engagement surge voltage value;(2) within the initial engagement surge voltage duration, voltage rises to starting according to specific rule Voltage minimum, and keep within the starting time;(3) after starting, voltage rises to steady-state value and keeps steady according to specific rule It is fixed;(4) under normal condition, voltage keeps steady-state value.
3) the voltage change requirement of initial engagement surge voltage, setting steps 2 are started according to engine as shown in Figure 1) In each function parameter, including timing parameter, Boolean function parameter, Growth Function parameter, scale parameter, delay function ginseng Number, and the interrelated logic parameter of state change logic module etc.;
4) under the integration environment of dSPACE test systems, dSPACE switching signal output parameters, dSPACE power supplys are set Voltage signal output parameter, dSPACE limit value current signal output parameters, after power source model compiling is passed through dSPACE is downloaded to Test system;
5) it is using ControlDesk softwares, Matlab power source models and test system is hard under dSPACE test systems Part is connected, and by being input into firing switch signal, realizes the simulation output of initial engagement surge voltage, as shown in Figure 6.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims (7)

1. a kind of engine starts the analogy method of initial engagement surge voltage, it is characterised in that comprise the following steps:
1) clear and definite engine starts the change of initial engagement surge voltage and requires, determines each relevant parameter;
2) with dSPACE diesel engine hardware-in―the-loop test systems as platform, under Matlab Simulink environment, power supply mould is designed Type;
3) require according to voltage change, the parameter value or parameter area of each variable of power source model is set;
4) parameter of power source model is set under the integration environment of dSPACE test systems, and is compiled, is downloaded;
5) under dSPACE test systems, by being input into firing switch signal, the simulation output of initial engagement surge voltage is realized.
2. engine according to claim 1 starts the analogy method of initial engagement surge voltage, it is characterised in that:Step 1) parameter described in includes steady state voltage value, initial engagement surge voltage value, initial engagement surge voltage duration, starting electricity Pressure minimum of a value, duration of starting.
3. engine according to claim 2 starts the analogy method of initial engagement surge voltage, it is characterised in that:Step 2) power source model in includes:
Firing switch acquisition module, for detecting to the firing switch signal that dSPACE test systems are exported, and will detection To switching signal value transmit to the state change logic module;
Steady state voltage signaling module, for making dSPACE test systems export steady state voltage signal, and by the steady state voltage signal Transmit to the state change logic module;
Climbing speed control module, for by arranging timeticks, making voltage according to certain increasing law, realizes the short time Interior rapid increase, and state change logic module is arrived in change voltage signal output;
State change logic module, realizes following logic:(1) open when receiving the starting that the firing switch acquisition module sends When closing closure signal, output voltage drops to initial engagement surge voltage value;(2) in the initial engagement surge voltage duration Interior, output voltage rises to starting voltage minimum of a value according to special certain rule, and keeps within the starting time;(3) after starting, In duration of starting, output voltage rises to steady-state value and keeps stable according to certain rule;(4) under normal condition, output Voltage keeps steady-state value.
4. engine according to claim 3 starts the analogy method of initial engagement surge voltage, it is characterised in that:It is described Firing switch acquisition module includes manual input switches control signal, through the effect of Boolean function, by dSPACE data signals IOB exports firing switch signal.
5. engine according to claim 3 starts the analogy method of initial engagement surge voltage, it is characterised in that:It is described Steady state voltage signaling module includes voltage output module and current output module;
The voltage output module includes that input voltage enables signal and steady state voltage control signal, sequentially passes through switch and selects letter Number, the effect of gain function, by dSPACE power supply voltage signals IOB steady state voltage signal is exported;
The current output module includes that input current enables signal and limit value current controling signal, sequentially passes through switch and selects letter Number, the effect of gain function, by dSPACE power current signals IOB limit value electric current is exported.
6. engine according to claim 3 starts the analogy method of initial engagement surge voltage, it is characterised in that:It is described Climbing speed control module includes on the basis of default timeticks, sequentially passes through exponential function, amplitude qualified function, gain The effect of function, delay function, realizes expected climbing speed control.
7. engine according to claim 1 starts the analogy method of initial engagement surge voltage, it is characterised in that:Step 5) the dSPACE test systems are, by ControlDesk softwares, power source model to be connected with test system hardware, are realized Firing switch signal is provided by test system, and initial engagement surge voltage is exported to electric-control system.
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