Integrated Satellite Attitude Determination and Control System Power by Reaction Sphere

Virtual Exhibit Booth: https://calpoly.zoom.us/j/89020493339?

Wednesday 8 AM – 9 AM PT and 2 PM – 4 PM PT / Thursday 8 AM – 10 AM PT and 2 PM – 4 PM PT

 

CAN'T GO TO SPACE WITHOUT ADCS

Every satellite in orbit requires precise orientation control along the X, Y, and Z axes. This is the so-called attitude control, which is essential for optical sensing satellites and broadband communication satellites. To achieve precise orientation control, we use magnetometer, gyroscope, and fine sun sensors as the attitude determination sub-system. The spherical motor and magnetorquers function as the attitude actuators.

Tensor Tech developed Reaction Sphere, a groundbreaking spherical motor technology for satellite attitude control systems. With Reaction Sphere, people can replace three motors with only one. This patented technology enables spacecraft to conduct more power-intensive operations and carry more payloads.

We provide our customers with a full-stack service for the satellite attitude determination and control system (ADCS). From mission design, the delivery of components or systems, to integration support, we are a crucial subsystem supplier and a consulting team for our customers along their space journey.

CAN'T GO TO SPACE WITHOUT ADCS

Every satellite in orbit requires precise orientation control along the X, Y, and Z axes. This is the so-called attitude control, which is essential for optical sensing satellites and broadband communication satellites. To achieve precise orientation control, we use magnetometer, gyroscope, and fine sun sensors as the attitude determination sub-system. The spherical motor and magnetorquers function as the attitude actuators.

Tensor Tech developed Reaction Sphere, a groundbreaking spherical motor technology for satellite attitude control systems. With Reaction Sphere, people can replace three motors with only one. This patented technology enables spacecraft to conduct more power-intensive operations and carry more payloads.

We provide our customers with a full-stack service for the satellite attitude determination and control system (ADCS). From mission design, the delivery of components or systems, to integration support, we are a crucial subsystem supplier and a consulting team for our customers along their space journey.

Services and Projects

Attitude Control System Testing Services

The simulation of a zero-gravity environment on earth for attitude control experiments is sophisticated. Furthermore, engineers usually don’t have equipment that has better precision than their ADCS when orbiting in space. Thus, control accuracies can never be validated. Here at Tensor Tech, we provide a platform with:

  • Spherical Air Bearing Platform to simulate 3 DOF motion in space
  • 3-axis magnetic cage to simulate the earth magnetic field in space
  • Sunlight source and darkroom to simulate sun in space

Using the above equipment, we will test our customer’s satellite attitude control system in a “hardware in the loop” and summarize a test report.

Mass Properties Measurement Services

  • Mass properties measurement for small satellites is crucial to correct the functioning of the attitude control system as well as increasing its response time. To fine-tune the parameters of the ADCS algorithm, information of total mass, the center of mass, and moment of inertia are necessary. Attitude control parameters can’t just rely on simulation data, but experimental measurements as well.
  • Tensor Tech’s mass properties measurement service is dedicated to objects’ weight from 0.5kg ~ 10kg. This measurement is based on a set of spherical air bearing, inclinometer, and tactical grade gyroscope. By delivering a test object to us, we will provide a test report with the following information about the satellite or any rigid body.

    • Total Mass (measured separately), accuracy: +/- 10 mg
    • Position of the center of the mass, accuracy: +/- 0.1mm
    • Moment of inertia: +/- 2%

ADCS100 - Integrated ADCS with Reaction Sphere

Our satellite Attitude Determination and Control System (ADCS) is designed for CubeSats ranging from 1.5U, 2U, 3U, to 6U. A full set of attitude determination/actuator hardware and firmware is embedded. Our subsystem combines six Fine Sun Sensors (FSS100 from Tensor Tech), one Reaction Sphere (RS100 from Tensor Tech), one gyroscope, and one magnetometer to provide a pointing accuracy up to 0.2 deg (3-sigma) when the sun is capturable and 1 deg (3-sigma) when the sun is not capturable. The input of GPS module data is required for attitude determination.

RS100 - Reaction Sphere

One Reaction Sphere unit can achieve the same function as three traditional reaction wheels, but in nearly 1/3 of the volume, cost, weight, and power consumption. Its max. angular momentum and max. torque can be customized for CubeSats ranging from 1.5U, 2U, 3U, to 6U. In terms of rotational dynamics, this motor functions like a variable-speed, single-gimbal Control Moment Gyro (CMG); but is actuated by a spherical motor. Moreover, this motor has three magnetorquers in X, Y, and Z axes equipped. With this device, you can control the orientation of your CubeSat like 3 traditional single-axis reaction wheels and 3three magnetorquers do. However, the weight, size, and power consumption is lower.

FSS100 - Nano Fine Sun Sensor

Our compact nano Fine Sun Sensor (FSS) features low power consumption and a high update rate. This device senses the direction of sunlight in two vectors and provides pointing knowledge up to 0.1 deg (3-sigma, no albedo). It can also be operated as a coarse sun sensor.

Attitude Control Experiment Platform

The simulation of a zero-gravity environment on earth for attitude control experiments is sophisticated. Tensor Tech’s solutions as follows:

  •  Spherical Air Bearing Platform to simulate 3 DOF motion in space
  • 3-axis magnetic cage to simulate the earth magnetic field in space
  • Sunlight source and darkroom to simulate sun in space

Our customers can test their satellite attitude control system in “hardware in the loop” with our system.

Thomas Yen

CEO and Co-Founder

  • Business Development & Hardware
  • Electrical Engineering, National Taiwan University

Sam Lee

CTO and Co-Founder

  • Control & Firmware
  • Electrical Engineering, National Taiwan University

Austin Chang

COO and Co-Founder

  • Finance & Software
  • Computer Science, National Taiwan University of Science and Technology

Luke Hou

CPO and Co-Founder

  • Mechanisms & Manufacturing
  • Electrical Engineering, National Sun Yat-sen University

Jordan Hsieh

Business Development Executive

  • Sales & Marketing
  • Mechanical Engineering, National Cheng-Kung University
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