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1 | #include "pch.h" | |||
2 | #include "throttle_model.h" | |||
3 | ||||
4 | // From CFD modeled 70mm throttle | |||
5 | static const float throttle70mmFlowBins[] = { 2, 5, 10, 20, 30, 40, 60, 80, 85, 90, 91 }; | |||
6 | static const float throttle70mmFlowValues[] = { 0.000095, 0.002, 0.0107, 0.045, 0.103, 0.185, 0.438, 0.74, 0.77, 0.775, 0.775 }; | |||
7 | ||||
8 | class MockThrottleModel : public ThrottleModelBase { | |||
9 | public: | |||
10 | 341 | float effectiveArea(float tps) const override { | ||
11 | // table is kg/s, function returns g/s | |||
12 | 341 | return 1000 * interpolate2d(tps, throttle70mmFlowBins, throttle70mmFlowValues); | ||
13 | } | |||
14 | ||||
15 |
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28 | MOCK_METHOD(float, maxEngineFlow, (float map), (const, override)); | |
16 | }; | |||
17 | ||||
18 | 4 | TEST(ThrottleModel, PartThrottle) { | ||
19 |
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1 | MockThrottleModel model; | |
20 | ||||
21 |
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1 | EXPECT_CALL(model, maxEngineFlow(::testing::_)).WillRepeatedly([](float map) { return map / 100 * 500; }); | |
22 | ||||
23 | // Vary throttle at constant PR/temp | |||
24 | // 100kPa inlet | |||
25 | // 45 kPa MAP | |||
26 | // 0C IAT | |||
27 |
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1 | EXPECT_NEAR( 10.56, model.estimateThrottleFlow(100, 10, 45, 0), 1e-1); | |
28 |
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1 | EXPECT_NEAR( 44.41, model.estimateThrottleFlow(100, 20, 45, 0), 1e-1); | |
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1 | EXPECT_NEAR(101.65, model.estimateThrottleFlow(100, 30, 45, 0), 1e-1); | |
30 |
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1 | EXPECT_NEAR(182.58, model.estimateThrottleFlow(100, 40, 45, 0), 1e-1); | |
31 | ||||
32 | // Vary inlet pressure | |||
33 |
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1 | EXPECT_NEAR(1.0 * 44.41, model.estimateThrottleFlow(100, 20, 45, 0), 1e-1); | |
34 |
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1 | EXPECT_NEAR(1.5 * 44.41, model.estimateThrottleFlow(150, 20, 45, 0), 1e-1); | |
35 | 2 | } | ||
36 | ||||
37 | 4 | TEST(ThrottleModel, InverseFlowLowPressureRatio) { | ||
38 |
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1 | MockThrottleModel model; | |
39 | ||||
40 |
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1 | EXPECT_NEAR( 2.329, model.throttlePositionForFlow( 0.3, 0.3, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR( 3.446, model.throttlePositionForFlow( 1, 0.3, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR( 9.674, model.throttlePositionForFlow( 10, 0.3, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR(29.711, model.throttlePositionForFlow(100, 0.3, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR(41.395, model.throttlePositionForFlow(200, 0.3, 100, 0), 1e-2); | |
45 |
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1 | EXPECT_NEAR(57.415, model.throttlePositionForFlow(400, 0.3, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR(71.255, model.throttlePositionForFlow(600, 0.3, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR(77.965, model.throttlePositionForFlow(700, 0.3, 100, 0), 1e-2); | |
48 |
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1 | EXPECT_NEAR(83.323, model.throttlePositionForFlow(750, 0.3, 100, 0), 1e-2); | |
49 |
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1 | EXPECT_NEAR(85.070, model.throttlePositionForFlow(760, 0.3, 100, 0), 1e-2); | |
50 | ||||
51 | // Throttle is maxed out here! | |||
52 | ||||
53 |
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1 | EXPECT_NEAR(100.00, model.throttlePositionForFlow(770, 0.3, 100, 0), 1e-2); | |
54 |
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1 | EXPECT_NEAR(100.00, model.throttlePositionForFlow(800, 0.3, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR(100.00, model.throttlePositionForFlow(900, 0.3, 100, 0), 1e-2); | |
56 | 2 | } | ||
57 | ||||
58 | 4 | TEST(ThrottleModel, InverseFlowHighPressureRatio) { | ||
59 |
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1 | MockThrottleModel model; | |
60 | ||||
61 |
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1 | EXPECT_NEAR( 2.626, model.throttlePositionForFlow( 0.3, 0.9, 100, 0), 1e-2); | |
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1 | EXPECT_NEAR( 4.437, model.throttlePositionForFlow( 1, 0.9, 100, 0), 1e-2); | |
63 |
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1 | EXPECT_NEAR( 5.738, model.throttlePositionForFlow( 2, 0.9, 100, 0), 1e-2); | |
64 |
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1 | EXPECT_NEAR( 8.571, model.throttlePositionForFlow( 5, 0.9, 100, 0), 1e-2); | |
65 |
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1 | EXPECT_NEAR(11.670, model.throttlePositionForFlow( 10, 0.9, 100, 0), 1e-2); | |
66 |
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1 | EXPECT_NEAR(37.473, model.throttlePositionForFlow(100, 0.9, 100, 0), 1e-2); | |
67 |
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1 | EXPECT_NEAR(51.348, model.throttlePositionForFlow(200, 0.9, 100, 0), 1e-2); | |
68 |
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1 | EXPECT_NEAR(74.510, model.throttlePositionForFlow(400, 0.9, 100, 0), 1e-2); | |
69 |
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1 | EXPECT_NEAR(87.093, model.throttlePositionForFlow(470, 0.9, 100, 0), 1e-2); | |
70 |
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1 | EXPECT_NEAR(88.737, model.throttlePositionForFlow(471, 0.9, 100, 0), 1e-2); | |
71 | ||||
72 | // Throttle is maxed out here! | |||
73 | ||||
74 |
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1 | EXPECT_NEAR(100.00, model.throttlePositionForFlow(473, 0.9, 100, 0), 1e-2); | |
75 |
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1 | EXPECT_NEAR(100.00, model.throttlePositionForFlow(500, 0.9, 100, 0), 1e-2); | |
76 |
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1 | EXPECT_NEAR(100.00, model.throttlePositionForFlow(600, 0.9, 100, 0), 1e-2); | |
77 |
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1 | EXPECT_NEAR(100.00, model.throttlePositionForFlow(700, 0.9, 100, 0), 1e-2); | |
78 | 2 | } | ||
79 | ||||
80 | 4 | TEST(ThrottleModel, SmallEngineBigThrottle) { | ||
81 |
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1 | MockThrottleModel model; | |
82 | ||||
83 | // Engine can only flow 200g/s at 100kPa, much less than wide open throttle | |||
84 |
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1 | EXPECT_CALL(model, maxEngineFlow(::testing::_)).WillRepeatedly([](float map) { return map / 100 * 200; }); | |
85 | ||||
86 | // v part throttle model v | |||
87 |
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1 | EXPECT_NEAR( 81.9, model.estimateThrottleFlow(100, 40, 95, 0), 1e-1); | |
88 |
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1 | EXPECT_NEAR(138.0, model.estimateThrottleFlow(100, 50, 95, 0), 1e-1); | |
89 | // ^ part throttle model ^ | |||
90 | ||||
91 | // this engine does 0.95PR at 59% throttle, as the throttle is very big for the engine | |||
92 | ||||
93 | // v blend from part throttle to WOT v | |||
94 |
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1 | EXPECT_NEAR(190.2, model.estimateThrottleFlow(100, 60, 95, 0), 1e-1); | |
95 |
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1 | EXPECT_NEAR(192.6, model.estimateThrottleFlow(100, 70, 95, 0), 1e-1); | |
96 |
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1 | EXPECT_NEAR(195.1, model.estimateThrottleFlow(100, 80, 95, 0), 1e-1); | |
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1 | EXPECT_NEAR(197.5, model.estimateThrottleFlow(100, 90, 95, 0), 1e-1); | |
98 | // ^ blend from part throttle to WOT ^ | |||
99 | ||||
100 | // v WOT v | |||
101 |
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1 | EXPECT_NEAR(200.0, model.estimateThrottleFlow(100, 100, 95, 0), 1e-3); | |
102 | 2 | } | ||
103 | ||||
104 | 4 | TEST(ThrottleModel, BigEngineSmallThrottle) { | ||
105 |
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1 | MockThrottleModel model; | |
106 | ||||
107 | // Big engine can flow 2000g/s, much more than wide open throttle will support | |||
108 |
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1 | EXPECT_CALL(model, maxEngineFlow(::testing::_)).WillRepeatedly([](float map) { return map / 100 * 2000; }); | |
109 | ||||
110 | // v part throttle model v | |||
111 |
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1 | EXPECT_NEAR( 82.0, model.estimateThrottleFlow(100, 40, 95, 0), 1e-1); | |
112 |
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1 | EXPECT_NEAR(138.0, model.estimateThrottleFlow(100, 50, 95, 0), 1e-1); | |
113 |
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1 | EXPECT_NEAR(194.1, model.estimateThrottleFlow(100, 60, 95, 0), 1e-1); | |
114 |
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1 | EXPECT_NEAR(261.0, model.estimateThrottleFlow(100, 70, 95, 0), 1e-1); | |
115 |
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1 | EXPECT_NEAR(327.9, model.estimateThrottleFlow(100, 80, 95, 0), 1e-1); | |
116 |
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1 | EXPECT_NEAR(343.4, model.estimateThrottleFlow(100, 90, 95, 0), 1e-1); | |
117 |
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1 | EXPECT_NEAR(343.4, model.estimateThrottleFlow(100, 100, 95, 0), 1e-1); | |
118 | // ^ part throttle model ^ | |||
119 | 2 | } | ||
120 |