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Update 2025 Rocket Satellite authored by Lennard Rohs's avatar Lennard Rohs
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Student-Projects/2025-Rocket-Satellite.md
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...@@ -4,6 +4,7 @@ title: 2025 Rocket Satellite ...@@ -4,6 +4,7 @@ title: 2025 Rocket Satellite
<details> <details>
<summary>Table Of Contents</summary> <summary>Table Of Contents</summary>
...@@ -237,7 +238,7 @@ The Periphery to be supported: ...@@ -237,7 +238,7 @@ The Periphery to be supported:
**Power Supply Design**! **Power Supply Design**!
- Design 1: Only Voltage Regulator on ESP32 - Design 1: Only Voltage Regulator on ESP32
[Power Supply Design 1](uploads/9bfd4ab18d8e08cbdd67c810caa9f2d4/DC_1.png) ![Power Supply Design 1](uploads/9bfd4ab18d8e08cbdd67c810caa9f2d4/DC_1.png)
The first Design is the most straight forward Solution. The first Design is the most straight forward Solution.
While it is simple, not requiring additional Components it only offers 3.3V with a maximum of 750 mA for all electrical Components. While many Servo Motors will run at 3.3V most are rated for 3.8V or above and realy suffer with low torque and relaiability at lower Voltages. While it is simple, not requiring additional Components it only offers 3.3V with a maximum of 750 mA for all electrical Components. While many Servo Motors will run at 3.3V most are rated for 3.8V or above and realy suffer with low torque and relaiability at lower Voltages.
...@@ -245,21 +246,21 @@ While it is simple, not requiring additional Components it only offers 3.3V with ...@@ -245,21 +246,21 @@ While it is simple, not requiring additional Components it only offers 3.3V with
- Design 2: Boost Converter direktly on Battery - Design 2: Boost Converter direktly on Battery
[DC_4.drawio](uploads/49a3224dd4d9586845b3c0d2a6f5084e/DC_4.drawio.png) ![DC_4.drawio](uploads/49a3224dd4d9586845b3c0d2a6f5084e/DC_4.drawio.png)
The Second Design Tested was to have a seperate Voltage Supply for the Motors and the rest of the Hardware. The Second Design Tested was to have a seperate Voltage Supply for the Motors and the rest of the Hardware.
This failed hower because the Boost Converter and Esp32 would effectivly act as a Voltage Divider dropping the Voltage registered at the battery Protection circuit of the esp32 below the needed 3.2V, even at very low currents. This failed hower because the Boost Converter and Esp32 would effectivly act as a Voltage Divider dropping the Voltage registered at the battery Protection circuit of the esp32 below the needed 3.2V, even at very low currents.
- Design 3: Boost Converter and seperate BMS - Design 3: Boost Converter and seperate BMS
[DC2_fr_fr_eigentlich_3](uploads/724917f8ae6e85e3931fdf7ccaf16f5c/DC2_fr_fr_eigentlich_3.png) ![DC2_fr_fr_eigentlich_3](uploads/724917f8ae6e85e3931fdf7ccaf16f5c/DC2_fr_fr_eigentlich_3.png)
The third design tested was utilising a seperate BMS PCB to keep the Battery Voltage at the correct level on for Protection circuit while not beeing limited to the 0.75 A of the ESP32s Voltage regulator. The third design tested was utilising a seperate BMS PCB to keep the Battery Voltage at the correct level on for Protection circuit while not beeing limited to the 0.75 A of the ESP32s Voltage regulator.
While the Design theoretically provided optimal Power for the Motors it had a lot of Components and inefficiencies limiting the actual benefits. While the Design theoretically provided optimal Power for the Motors it had a lot of Components and inefficiencies limiting the actual benefits.
-Design 4: Hybrid Solution -Design 4: Hybrid Solution
[Untitled_Diagram.drawio__3_](uploads/a151ebf583ed98e7146584670af08911/Untitled_Diagram.drawio__3_.png) ![Untitled_Diagram.drawio__3_](uploads/a151ebf583ed98e7146584670af08911/Untitled_Diagram.drawio__3_.png)
The fourth Desing tested and ultimatly used in the Rocket was a hybrid design where the Motors could be connected to ether the Boosted Voltage or the ESP32 Voltage via a jumper. The fourth Desing tested and ultimatly used in the Rocket was a hybrid design where the Motors could be connected to ether the Boosted Voltage or the ESP32 Voltage via a jumper.
During testing we noticed that while the mechanical Power correlated to the electical Power provided the maximum Torque of the Moter was purly related to the supplyed Voltage. During testing we noticed that while the mechanical Power correlated to the electical Power provided the maximum Torque of the Moter was purly related to the supplyed Voltage.
...@@ -267,7 +268,7 @@ The hybrid Design offerd maximum flexibility where the Servo Motor could ether b ...@@ -267,7 +268,7 @@ The hybrid Design offerd maximum flexibility where the Servo Motor could ether b
** Full Design ** ** Full Design **
[Untitled_Diagram.drawio__2_](uploads/e550f9be40eb19ea4c06742da0a5967e/Untitled_Diagram.drawio__2_.png) ![Untitled_Diagram.drawio__2_](uploads/e550f9be40eb19ea4c06742da0a5967e/Untitled_Diagram.drawio__2_.png)
In addition to the Power Supply the Motors had to provided with PWM Signals. In addition to the Power Supply the Motors had to provided with PWM Signals.
Additionaly the remaining Periphery needed to be connected and the IC2 Communication of the 10DOF PCB had to be connected to appropriate pins. Additionaly the remaining Periphery needed to be connected and the IC2 Communication of the 10DOF PCB had to be connected to appropriate pins.
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