Micro Cold Gas Proportion thruster for Deep Interplanetary Exploration Development in BICE

Transcription

1 Micro Cold Gas Proportion thruster for Deep Interplanetary Exploration Development in BICE Xudong Wang, Jinyue Geng, Xuhui Liu (Dr. Xudong Wang,Chief Designer)

2 Special requirements of Deep Interplanetary exploration General requirements for micro propulsion system Low cost light weight simple structure customized design

3 Requirements of Deep Interplanetary exploration Special requirements for one propulsion system Could generate different thrust Flexible control mode Off-the-shelf technology Low cost Beneficial to Manufacture Management Applicable for different satellites Proportional Propulsion system

4 Requirements of Deep Interplanetary exploration Special requirements Extreme requirements during special time High resolution Thrust adjustable Ultra-Fine Attitude Control Make-up of Solar Radiation Pressure and other environmental disturbances Real Time Drag-free Control Proportional propulsion system

5 Ultra-high Pressure Micro Cold Gas propulsion System Ultra-high pressure facility Cylinder Latch Valve Ultra-high pressure facility High Pressure Transducer Micro Thrust Balance Low Pressure Transducer Two-Stage Regulator Micro valve test facility 10mN Thruster 200mN Thruster

6 Ultra-high Pressure Micro Cold Gas propulsion System NO. Parameter Value 1 Propellant N 2 2 Pressure 60MPa 3 Ratio 600:1 4 Mass 1-2kg 5 Thrust range 10mN~200mN Feature Ultra-high pressure High impulse light weight Large pressure regulate ratio 6 life 100,000 7 Is 620N.s/kg 8 Total impulse 700N.s

7 Solid Cold Gas propulsion System Feature: - Zero leakage during storage - Long term storage(10-15y) - Simple Structure - Small Volume - Flexible,easy to be Modularization T3 Flight Proven Generator Assemble Modular Cold Gas Generator Micro Cold Gas Thruster

8 Solid Cold Gas propulsion System Traditional Cold Gas System - High pressure components - such as high pressure cylinder, high pressure fill/drain valve, high pressure latch valve Solid Cold Gas Micro Propulsion Modular - High pressure components free - Low pressure cylinder - Gas generator - Transducers and driven circuit

9 Solid Cold Gas propulsion System Parameter Voltage Power Consumption Thrust Is Total impulse Minimum pulse width Mass Volume Open time response Close time response Leakage Value 5V <2W ~50mN >60s 30~100Ns <10ms 950g 96mm 96mm 98mm(1U) <5ms <5ms Pa L/s s(2mpa,he)

10 Butane Micro Cold Gas Propulsion System Traditional Cold Gas System - High pressure components - such as high pressure cylinder, high pressure fill/drain valve, high pressure latch valve Solid Cold Gas Micro Propulsion Modular -Saturated vapor pressure, self-pressurization -Low cost -3D Print Technology -Small Volume Transducer F/D Valve Latch valve Thruster modular capillary Solenoid valve Heater nozzle

11 Butane Micro Cold Gas Propulsion System Feature: Propellant: Butane Total impulse: 50Ns Thrust range 200mN~1N Minimum impulse is 0.5mNs The weight of the Module(including propellant): less than 0.3kg Working voltage: 12V

12 Proportional Module characteristics and working principle Special requirements for one propulsion system Could generate different thrust Flexible control mode Off-the-shelf technology Low cost Beneficial to Manufacture Management Applicable for different satellites Sketch of the Proportional Thruster Module Mass Flow VS Thrust F=f(m)

13 Proportional Solenoid valve Proportional Solenoid valve Force-Stroke-Current Test Facility 阀 2 升程 阀 2 回程 V 17.5V 21.5V 24V 28V 弹簧 7N/mm 弹簧 9N/mm 13

14 Proportional Solenoid valve Parameter Value Voltage 0-12V Power Consumption <2W Thrust Range 1~100mN Is >60s Nominal pressure <2MPa Mass 40g Open time response <5ms Close time response <5ms Leakage Pa L/s s(2mpa,he) Repeatability Test Different Control Mode

15 Ultra-Fine Proportional Cold Gas Propulsion System for Drag-free Satellites Feature: Drag-free scientific satellites High resolution Ultra-Fine Attitude Control Make-up of Solar Radiation Pressure and other environmental disturbances Real Time Drag-free Control Continual Adjustable Thrust μn Micro Proportional Thrust Modular Lyra Plan/Tai Chi Plan

16 Ultra-Fine Proportional Cold Gas Propulsion System for Drag-free Satellites requirements Traditional Cold Gas Thrust Drag-free Piezo-Electrical Regulator Thrust Certain Value Thrust Adjustable Noise None High Resolution Low High Thrust mn μn Working Mode Short time/impulse Continuous Response time Low High Mechanical Regulator Thermal Mass Flow Sensor Piezo Thrust

17 Ultra-Fine Proportional Cold Gas Propulsion System for Drag-free Satellites Feature: μn thruster level Low Thrust Noise High resolution Piezo-electrical Driven Thermal Mass Flow Sensor Pressure/Temperature Compensations Parameter Value Propellant N 2 Voltage 0-120V Power Consumption <2W Thrust Range 0.5~700μN Resolution 0.5μN Noise <1μN/ Hz Nominal pressure <0.2MPa Mass Flow 0.5~1000μg/s Response Time <500ms Leakage Pa L/s Piezo-electrical Thruster Thrust Test Facility

18 Conclusion System design based on the propellant storage state Proportional thrust modular Same hardware to meet different requirements Beneficial to manufacture management Feed back system for ultra-fine requirements Proportional micro mass flow control could be utilized by electrical propulsion systems

19 Adaptive fuzzy PID controller to improve the modular performance Block diagram

20 Adaptive fuzzy PID controller to improve the modular performance Block diagram The diagram of experiment system

21 Experimental Results Step responses of regular PID, fuzzy PID and AVUF PID 2. square track results of regular PID, fuzzy PID and AVUF PID

22 Conclusions The problem of the control of small proportion cool air microthrusters were analyzed Utilizing variable universe Adaptive adjustment actors are designed based on the variable universe stretching factor without stretching factor function model and its parameters mode Using fuzzy reasoning to realize fuzzy PID control theory telescopic change domains The simulation results show that the proposed controller is better than the conventional PID control and fuzzy PID control performance in regulation time and overshoot with fast dynamic response, high stability, anti-interference ability and robust features.

23 求实 / 求是 / 创新 / 超越 kyffwd@163.com