Search

CN-121396712-B - Control method of self-adaptive heat control radiator for radio frequency microwave front end

CN121396712BCN 121396712 BCN121396712 BCN 121396712BCN-121396712-B

Abstract

The invention relates to the technical field of automatic control, in particular to a control method of a self-adaptive heat control radiator for a radio frequency microwave front end, which comprises the following steps of registering a digital predistortion tap and an envelope tracking voltage rail as soft actuators, registering a gas plug driving unit of a controllable non-condensing gas plug heat pipe as hard actuators, and executing closed loop operation based on data acquisition of each service frame by a system controller in a control window during continuous operation of the service waveform, wherein the synthesized baseband sequence, the rail pressure sequence and the operation sequence are respectively issued to a transmitting link, an envelope tracking power supply and the gas plug driving unit in the control window. The invention can actively intervene before heat stress is formed, the peak envelope ratio and the output power are rapidly reduced by the soft actuator, the instantaneous power consumption is reduced from a signal domain, and meanwhile, the heat is guided to a region with higher heat dissipation efficiency by reconstructing a heat passage by the hard actuator, so that local overheating is avoided.

Inventors

  • LIU SHAOHONG
  • LIU QI
  • Ru lin

Assignees

  • 西安汉道防务科技有限公司

Dates

Publication Date
20260508
Application Date
20251027

Claims (10)

  1. 1. A self-adaptive heat control radiator control method for a radio frequency microwave front end is characterized by comprising the following steps of registering a digital predistortion tap and an envelope tracking voltage rail as a soft actuator, and registering a gas plug driving unit of a controllable non-condensing gas plug heat pipe as a hard actuator; during the continuous running of the service waveform, the system controller performs the following closed-loop operation based on the data acquired by the current frame in a control window of each service frame, wherein the closed-loop operation comprises the steps of acquiring and sampling Ji Jidai, rail pressure sampling, temperature and heat flow sampling and air lock position states, and generating an isomorphic frame comprising a baseband sequence, a rail pressure sequence, a temperature sequence, a heat flow sequence and an air lock state sequence; deriving a thermal stress level representing the current state according to isomorphic frames, retrieving a soft actuator action combination and a hard actuator action combination in a preset thermal control mapping table according to the thermal stress level and combining a waveform characteristic detection result of a baseband sequence, synthesizing a baseband sequence and a rail pressure sequence for shaping a peak envelope ratio and implementing output back-off according to the soft actuator action combination, synthesizing an operation sequence for migrating a gas plug to reconstruct a thermal path according to the hard actuator action combination, respectively issuing the synthesized baseband sequence, the rail pressure sequence and the operation sequence to a transmitting link, an envelope tracking power supply and a gas plug driving unit for execution in a control window, specifically comprising a system controller firstly submitting the shaped rail pressure sequence in the control window, wherein the submitting point is not earlier than 0.5 millisecond after the beginning of the window, then submitting the baseband sequence subjected to peak top covering and phase rearrangement processing, and the submitting point is not earlier than 0.3 millisecond after the submitting point, and finally submitting an operation sequence at the end section of the control window to trigger the air lock migration, enabling the starting point to be not earlier than 2 milliseconds after the baseband lifting point, and immediately reading the state of the position sensor to confirm after each fine tuning action is finished.
  2. 2. The method according to claim 1, wherein the waveform characteristic detection result of the baseband sequence includes at least one of a peak top density sequence obtained by performing a sliding detection of the baseband sequence, a change frequency sequence obtained by counting the number of amplitude changes, and a high-frequency occupation indication sequence obtained by converting to a frequency domain to extract edge frequency point energy.
  3. 3. The method of claim 1, wherein the step of generating the isomorphic frame comprises buffering the baseband samples, the rail pressure samples, the samples of temperature and heat flow, and the air lock position states in a control window, and filling or diluting each buffered sequence by linear insertion or nearest neighbor so that each sequence has a corresponding value at each sampling position.
  4. 4. The method of claim 1, wherein the deriving the heat stress level comprises mapping a heat path status tag indicating a combination of a main path, a bypass, and a limiting path between the evaporator and the condenser according to a temperature sequence, a heat flow sequence, and a gas lock status sequence of the isomorphic frame, and looking up a table according to the heat path status tag, the temperature, and the heat flow level.
  5. 5. The method of claim 1, wherein synthesizing the baseband sequence for shaping the peak envelope ratio comprises sliding detection on the baseband sequence to locate peak positions, selecting a window sequence matching the peak width from a predetermined window table for each located peak, and replacing the amplitudes of the coverage areas on both sides of the peak positions point by point in the window sequence, wherein the phase is maintained during the replacement, thereby forming a suppressed amplitude sequence.
  6. 6. The method of claim 5, wherein the step of synthesizing the baseband sequence further comprises a phase rearrangement gate operation, when the high frequency occupation indication in the waveform characteristic detection result is significant, specifically converting the suppressed amplitude sequence to a frequency domain amplitude opposite to the original phase information, reading the target phase sequence from a preset phase table, replacing the phase value with a value in the target phase sequence on the marked frequency point set, and inversely transforming back to the time domain.
  7. 7. The method according to claim 1, wherein the step of synthesizing the rail pressure sequence for implementing the output rollback specifically comprises the steps of reading an upper limit value, a lower limit value, a platform segment shortest continuous sampling number and a single step maximum variation corresponding to the output rollback intention from a preset rail pressure table, scanning the rail pressure sequence, replacing sampling points higher than the upper limit value or lower than the lower limit value with corresponding limit values, limiting the difference between adjacent sampling values not to exceed the single step maximum variation, and inserting a platform segment which is not shorter than the platform segment shortest continuous sampling number after the variation is finished, thereby obtaining the shaped rail pressure sequence.
  8. 8. The method according to claim 1, wherein the step of synthesizing the operation sequence for moving the air lock is characterized by specifically comprising the steps of reading the operation sequence corresponding to the air lock moving intention from a preset air lock moving table, controlling the opening of the heating band outside the evaporation section and the introduction of non-condensing gas into the heat pipe when the air lock is intended to be prolonged, controlling the opening of the heating band outside the condensation section and the discharge of the non-condensing gas when the air lock is intended to be shortened, and controlling the opening and closing of the heating band according to a preset combination to form a temperature gradient when the air lock is intended to be moved.
  9. 9. The method of claim 1 wherein the issuing step follows an interlock and sequence control in which the shaping of the rail pressure trajectory is completed, the peak envelope ratio shaping and phase rearrangement gates are completed, and the plug migration is triggered.
  10. 10. The method of claim 1, further comprising the steps of closed loop evaluation and on-line reforming after all performed actions of the frame are completed, comparing the end of frame with the head of frame samples, evaluating a heat stress improvement conclusion and a waveform fidelity conclusion, and if either conclusion does not reach a preset pass condition, performing an on-line reforming process before the end of the frame, the on-line reforming process including at least one of lifting the output rollback intention to a gear, switching to a stronger window entry, or invoking an acceleration entry to perform a higher intensity air lock fine adjustment.

Description

Control method of self-adaptive heat control radiator for radio frequency microwave front end Technical Field The invention belongs to the technical field of automatic control, and particularly relates to a control method of a self-adaptive heat control radiator for a radio frequency microwave front end. Background Radio frequency microwave front ends have seen significant development over the last two decades as a key component in modern communications, radar and satellite links, as well as power amplification, signal linearization and energy efficiency management techniques. The prior art generally employs digital predistortion, envelope tracking, and various forms of thermal management structures to maintain stable operation of the device at high power densities. The digital predistortion compensates the nonlinearity of the signal in the baseband domain to offset the nonlinearity of the power amplifier, and the envelope tracking adjusts the power supply voltage rail of the power amplifier in real time to match the energy supply of the amplifier with the output envelope, thereby improving the overall energy efficiency. Meanwhile, in terms of thermal management, the conventional heat dissipation method mainly depends on a passive radiator, a heat pipe, a phase change material or a liquid cooling plate to conduct out the heat generated by the device. However, as the frequency of the radio frequency system increases, the modulation complexity increases, and the integration level of the power amplifier increases continuously, the transient thermal load of the system increases significantly, and the response speed and the spatial adjustment capability of the conventional thermal management means cannot meet the rapidly changing thermal dynamics. In the existing radio frequency front end, envelope tracking and digital predistortion generally work independently, and control targets of the two are focused on signal quality and energy efficiency, and a feedback mechanism linked with a thermal state is not formed. When the power amplifier is continuously operated with a high peak envelope ratio signal (e.g., 5G NR or WLAN high order modulation waveform), thermal accumulation occurs in the hot spot region in a short time, resulting in an excessively fast junction temperature rise rate. Existing systems often rely only on temperature threshold triggered protection mechanisms such as gain reduction or channel shutdown. This approach has problems of delayed response and coarse regulation, and is often controlled after the temperature rises, failing to achieve active suppression in the early stages of thermal stress. Meanwhile, most of traditional heat pipes or phase-change heat dissipation structures are passive, heat transfer channels of the traditional heat pipes or phase-change heat dissipation structures are fixed, and thermal resistance distribution between an evaporation section and a condensation section cannot be adjusted according to different load conditions, so that local hot spots are in a high heat flux density area for a long time, and the reliability of devices is affected. In recent years, some studies have proposed active thermal pathway adjustment using controllable non-condensing airlock heat pipes, i.e., controlling the effective heat transfer length of the heat pipe by adjusting the position or volume of the non-condensing gas. However, most of these methods are based on temperature control or heating band power control, and do not combine the behavior characteristics of the radio frequency signals themselves to perform dynamic coordination. When the rf output power changes rapidly, the migration of the air lock lags behind the instantaneous change of heat, resulting in insufficient response speed of thermal control. In addition, the air lock adjustment is usually independent from the radio frequency electric control system, and the lack of unified control logic causes difficulty in system coordination and low response efficiency. Disclosure of Invention The invention mainly aims to provide a self-adaptive heat control radiator control method for a radio frequency microwave front end, which can actively intervene before heat stress is formed, rapidly reduce peak envelope ratio and output power through a soft actuator, reduce instantaneous power consumption from a signal domain, and simultaneously reconstruct a heat path through a hard actuator to guide heat to a region with higher heat dissipation efficiency so as to avoid local overheating. Compared with the traditional passive heat dissipation and delay protection mechanism, the invention realizes millisecond-level heat control response and structural-level heat conduction optimization, so that the radio frequency power amplifier keeps output linearity and heat stability under a high peak envelope ratio signal, the system reliability, heat dissipation uniformity and energy efficiency are obviously improved, and a heat dissipation control solution