Servo Control System for Quick-Deploy Trailer Mount Satellite Antenna

The Quick-Deploy Trailer Mount Satellite Antenna System is a device that intercepts high-frequency waves emitted by the transmitting station and transmits it to a receiver of a car radio, a car phone, or a radio navigation device to demodulate the carrier.

The Quick-Deploy Trailer Mount Satellite Antenna System is mainly composed of ACU, ADU, a shaft angle coding unit, a safety protection unit, and pedestal.

Servo Control System for Quick-Deploy Trailer Mount Satellite Antenna

Antenna control unit

The antenna control unit (ACU) mainly includes the embedded controller EC-4217, which supports 4 DI (24 V input, suspended low), 4 DO (relay output, maximum current 2 A), 3 way RS232, 2 way RS422 and 1 way RS485, 2 way isolated CAN bus interface, 2 way 10/100 Mbps industrial Ethernet interface, 4 way16-bit ADC, input signal range is ±10 V, 4 way 12-bit DAC.

The ACU is the core part of the antenna control system. The antenna control software runs in the ACU. The front panel of the ACU can complete the operation of the antenna. In the remote control mode, the command of the superior monitoring station is received to complete the required tasks.

The data of the shaft angle sensor is collected through the CAN port communication, the state of the safety protection unit is collected through the DO port, and the speed and angle of the antenna need to be rotated are calculated by combining the control command and the control algorithm, and finally the antenna driving unit is driven to drive the antenna to rotate, and the required rotation is completed. tracking taskk. The antenna control unit is the operational decision part of the Quick-Deploy Trailer Mount Satellite Antenna System system.

Antenna drive unit

The main function of the antenna driving unit is to drive the antenna frame rotation according to the instruction of the antenna control unit to complete the task of tracking the target. The antenna driving unit is the power execution part of the Quick-Deploy Trailer Mount Satellite Antenna System system.

The commonly used antenna mount is composed of two parts: an azimuth rotation axis and a pitch rotation axis. Therefore, the antenna drive unit is divided into an azimuth axis drive unit and a pitch axis drive unit 2, respectively driving the azimuth axis and the pitch axis of the antenna.

The drive chain of the antenna mount mainly includes the motor, the reducer and the gear set. There is a backlash during the driving process. The size of the backlash directly affects the pointing accuracy of the antenna, especially the gear gap of the reducer and the gear set is the largest.

Shaft angle coding unit

The shaft angle coding unit mainly comprises a shaft angle sensor and a power supply circuit. The shaft angle sensor and the antenna frame are connected by a synchronization device, and the shaft angle sensor rotates synchronously while the antenna frame rotates, and the antenna control unit is based on the shaft angle sensor. The data controls the position of the antenna, so the accuracy of the shaft angle sensor determines the rotation accuracy of the antenna mount

Security protection unit

Safety issues are the primary considerations in design. Not only must the operator’s safety be considered, but also the safety of the equipment itself. Three levels of protection are used in the design: software limit protection, electrical limit protection and hardware limit protection.

The software limit is to set the rotation range of the antenna in the software, and if the rotation is out of range, the drive is stopped. The electrical limit is to design the touch sensor at the extreme position of the antenna, and if the sensor is touched, the drive is stopped. The hardware limit is to design a bump block that blocks the rotation of the antenna near the rotation limit position. If the antenna hits the bump block beyond the limit position, the drive overcurrent protection stops.

In the case of antenna transportation or strong wind, the antenna is prevented from swaying and damages the transmission chain. The locking device is designed. The locking shaft is inserted into the locking device to ensure that the antenna does not shake when the antenna is transported or windy, and the antenna is prevented from being damaged. The antenna can be unlocked before the antenna works.

The Quick-Deploy Trailer Mount Satellite Antenna System servo system receives the carrier coordinate data and inertial data sent by the integrated control system, performs coordinate conversion, and calculates the azimuth, elevation and polarization angles of the antennas aligned with the satellite. Then compare with the current azimuth, elevation and polarization angles of the antenna, and through digital correction, output control signals to the power amplifier to drive the antenna to the target. As the carrier moves, the transmitted data changes in real time, and the angle calculated by the servo system is also changed correspondingly, and the antenna is driven to rotate in the target direction to achieve the purpose of tracking the satellite in real time. The Quick-Deploy Trailer Mount Satellite Antenna System servo system uses extended CAN communication technology and a mounting deviation angle calibration technique.

Application of Quick-Deploy Trailer Mount Satellite Antenna System system

Quick-Deploy Trailer Mount Satellite Antenna System system is mainly used in the field of wireless communications.

Military wireless communication field

In recent years, short-wave communication technology has been rapidly developed at home and abroad. Short-wave communication technology such as short-wave blind-free antennas can effectively improve short-wave communication capability to eliminate blind communication areas and provide more reliable communication guarantee. Ultra-short wave communication has the advantages of stable channel, large capacity, good internal communication result, fast transmission rate, and strong complementarity with short-wave communication, and has been rapidly developed. Because short-wave is farther than ultrashort-wave communication and has high survival rate on the battlefield, it is an indispensable strategic communication method in military radio communication. In order to meet the needs of future battlefield communication, it is particularly important to study a short-wave and ultra-short-wave sharing antenna that can solve the short-wave communication blind zone. A tactical short-wave & ultra-short-wave Quick-Deploy Trailer Mount Satellite Antenna System was developed and designed to achieve full-band impedance matching from 1.6MHz to 88MHz.

Military Quick-Deploy Trailer Mount Satellite Antenna System

The field of wireless communication in life

The Quick-Deploy Trailer Mount Satellite Antenna System system, which can be used to receive electromagnetic waves for entertainment display. The function is not only these, but in a certain sense it can also provide wireless information data for some car videos with wireless acceptance. Some cars have some video displays inside, and their internal wiring is connected to the wireless receiver, so you can receive wireless signals. To achieve the purpose of television entertainment.