Programmable standard dynamic thrust control system

Abstract

This invention discloses a programmable standard dynamic thrust measurement and control system, belonging to the field of aero-engine testing, which solves the technical problem that existing technologies cannot obtain the dynamic thrust response characteristics of a test bench under variable loads. It includes a cylinder support, a pushrod cylinder, a hydraulic cylinder, and a controller. A bearing plate is mounted on the top surface of the moving frame, and a first baffle and a second baffle are spaced apart on the bottom surface. When the pushrod cylinder drives the loading plate to transmit the initial force value to the bearing plate, the hydraulic pressure from the hydraulic station to the hydraulic cylinder is adjusted based on feedback data from the working sensor and the preload sensor to prevent zero-point drift of the moving frame and ensure the accuracy of real-time measurement of the dynamic force change pattern of the moving frame.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine testing, and in particular relates to a programmable standard dynamic thrust measurement and control system. Background Technology

[0002] In tests such as thrust transient tests, fatigue cycle tests, constant Mach number climb tests, and level flight acceleration tests of aero-engines, the characteristics of the thrust transient process are one of the important design indicators and operational characteristics of the engine. Among these, dynamic thrust is a key parameter for evaluating the transient characteristics of aero-engines. For current military aircraft engines, dynamic thrust is an important indicator for measuring the acceleration and deceleration performance of aero-engines, and it is also a tactical and technical parameter. Furthermore, with the development and design requirements of next-generation combined cycle engines and adaptive variable cycle engines, the acquisition of dynamic thrust data for aero-engines is indispensable.

[0003] To ensure the accuracy of dynamic thrust test data, it is necessary to calibrate the dynamic thrust characteristics of the test bench. Currently, existing thrust measurement and control systems in China are limited to calibrating the steady-state thrust of aero-engines. Such systems can only calibrate the steady-state characteristics of the test bench under constant loads, and cannot obtain the dynamic thrust response characteristics of the test bench under varying loads. Furthermore, the dynamic performance of the test bench system can usually only be measured or calculated under step loads. To obtain accurate dynamic thrust test results under transient thrust conditions of aero-engines and correctly evaluate the engine's transient performance, it is necessary to accurately measure the thrust of the thrust test bench under different varying load conditions. This allows for the calibration of the dynamic thrust characteristics of the test bench and the understanding of its dynamic performance indicators. Summary of the Invention

[0004] In view of this, a programmable standard dynamic thrust measurement and control system is proposed to solve the technical problem that existing technologies cannot obtain the dynamic thrust response characteristics of the test bench under variable loads.

[0005] A programmable standard dynamic thrust measurement and control system is provided, which is suitable for measuring moving and fixed frames. The moving and fixed frames are connected to spring plates and include a cylinder bracket, a push rod cylinder, a hydraulic cylinder and a controller. The top surface of the moving frame is equipped with a bearing plate and the bottom surface is equipped with a first baffle and a second baffle at intervals.

[0006] The push rod cylinder is connected to a servo motor, and the end of the push rod cylinder facing the bearing plate is connected to a loading plate; the push rod cylinder is mounted on the cylinder bracket, and the cylinder bracket is in contact with the fixed frame;

[0007] A frame is installed at a preset position of the frame. A hydraulic cylinder is installed between the frame and the first baffle via a first elastic rod. One end of the first elastic rod is connected to the frame, and the other end is connected to the first baffle and is equipped with a preload sensor. A second elastic rod is installed between the frame and the first baffle, and a working sensor is installed on the second elastic rod.

[0008] The hydraulic cylinder is connected to a hydraulic station via a pipeline for adjusting the hydraulic pressure.

[0009] The controller is communicatively connected to at least the hydraulic station, hydraulic cylinder, push rod cylinder, working sensor, and preload sensor, wherein:

[0010] When the push rod cylinder drives the loading plate to transmit the initial force value to the bearing plate, the hydraulic pressure from the hydraulic station to the hydraulic cylinder is adjusted according to the feedback data from the working sensor and the preload sensor to avoid zero-point drift of the moving frame and ensure the accuracy of real-time measurement of the dynamic force change law of the moving frame.

[0011] The beneficial effects of the present invention are as follows:

[0012] It can apply different dynamic loads to the thrust measurement system of the aero-engine test stand, simulate the dynamic response of the test stand under different dynamic load conditions, and realize the dynamic calibration of the thrust measurement of the aero-engine test stand. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 Schematic diagram of a programmable standard dynamic thrust measurement and control system;

[0015] Figure 2 Programmable standard dynamic thrust measurement and control system;

[0016] The components include: 1. Servo motor; 2. Push rod cylinder; 3. Host computer; 4. Loading plate; 5. Bearing plate; 6. Private servo amplifier; 7. Moving frame; 8. Spring plate; 9. Hydraulic station; 10. Proportional valve; 11. Preload sensor; 12. Hydraulic cylinder; 13. Fixed frame; 14. Working sensor. Detailed Implementation

[0017] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0018] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0019] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0020] like Figure 1 The programmable standard dynamic thrust measurement and control system shown is programmable because it can input different steady-state forces and ensure that the steady-state force does not drift at the zero point of the moving frame 7. It is suitable for measuring the moving frame 7. The existing device includes a moving frame 7 and a fixed frame, and the moving frame 7 and the fixed frame are connected by a spring plate 8. The existing device has low measurement accuracy for the moving frame 7. This invention aims to add a controllable force system to the existing device, which includes a cylinder support, a push rod cylinder 2, a hydraulic cylinder 12 and a controller. The controller mainly completes the dynamic loading force input control, preload force input control, automatic data entry of working sensor and preload force sensor 11, and automatic generation and saving of online calibration.

[0021] The top surface of the moving frame 7 is equipped with a bearing plate 5 and the bottom surface is equipped with a first baffle and a second baffle at intervals.

[0022] The push rod cylinder 2 is connected to the servo motor 1, and the end of the push rod cylinder facing the bearing plate 5 is connected to the loading plate 4; the push rod cylinder 2 is mounted on the cylinder bracket, and the cylinder bracket is in contact with the fixed frame.

[0023] A frame 13 is installed at a preset position of the frame. A hydraulic cylinder 12 is installed between the frame 13 and the first baffle via a first elastic tie rod. One end of the first elastic tie rod is connected to the frame 13, and the other end is connected to the first baffle and a preload sensor 11 is installed thereon. A second elastic tie rod is installed between the frame 13 and the first baffle, and a working sensor is installed on the second elastic tie rod.

[0024] The hydraulic cylinder 12 is connected to the hydraulic station 9 via a pipeline for adjusting the hydraulic pressure.

[0025] The controller is communicatively connected to at least the hydraulic station 9, hydraulic cylinder 12, push rod cylinder 2, working sensor, and preload sensor 11, wherein:

[0026] When the push rod cylinder drives the loading plate 4 to transmit the initial force value to the bearing plate 5, the hydraulic station 9 adjusts the hydraulic amount to the hydraulic cylinder 12 based on the feedback data from the working sensor and the preload sensor 11 to avoid the zero-point drift of the moving frame 7 and ensure the accuracy of the real-time measurement of the dynamic force change law of the moving frame 7.

[0027] As a specific implementation method provided in this case, a valve is installed on the pipeline adjacent to the outlet of the hydraulic station 9. The preferred valve is a proportional valve 10 or a pilot-operated valve.

[0028] As a specific implementation provided in this case, a servo amplifier is also included, through which the hydraulic station 9 is electrically connected to the controller, and the control method of the controller includes:

[0029] The controller acquires the first force, second force, and adjustment parameters of the proportional valve 10 fed back by the working sensor and the preload sensor 11 in real time, and determines whether the first force has reached the preset value. The preset value is related to the structural stiffness of the high-altitude cabin experimental system. If so, the servo amplifier does not operate and the controller records the value of the first force. If not, the controller controls the liquid supply ratio of the hydraulic station 9 and drives the hydraulic cylinder 12 to adjust the first force fed back by the working sensor to be the same as the preset value.

[0030] When the first force fed back by the working sensor is the same as the preset value, it is determined whether the second force is zero. If so, the controller controls the loading disk 4 to apply the predetermined dynamic force and pushes the bearing disk 5 to carry out the test according to the design requirements. If not, the controller controls the adjustment of the dynamic force of the loading disk 4 until the second force is zero, and then pushes the bearing disk 5 to carry out the test.

[0031] In the above scheme, the controller is connected to the host computer 3, receives different design values ​​transmitted by the host computer, and measures the dynamic force change law of the moving frame 7 in real time under different states.

[0032] 1) Host computer 3, mainly responsible for dynamic loading force input control, preload force input control, automatic data input of working sensor and preload force sensor 11, and automatic generation and saving of online calibration; 2) Servo controller, mainly responsible for servo control of hydraulic station 9 and loader; 3) Hydraulic station 9, serving as the pressure source P of preload loader; 4) Hydraulic loader, using hydraulic cylinder 12 to preload test bench moving frame 7; 5) Dynamic force PLC module, converting the digital information of the force source programmed by the host computer into analog input to the analog input module; 6) Dynamic force PLC module, converting the digital information of the force source programmed by the host computer into analog input to the analog input module; 7) Analog input module, transmitting analog electrical signals to servo motor 1; 8) Push rod cylinder 2, applying dynamic thrust to the thrust bench; 9) Thrust bench, including moving frame 7 and fixed frame.

[0033] The push rod cylinder 2 is mounted on the cylinder support and connected to the dynamic force loading plate 4 via a flange. The dynamic force loading rod is vertically aligned with the dynamic force bearing plate 5 of the platform. The dynamic force bearing plate 5 is vertically mounted at the center of the moving frame 7. The moving frame 7 is fixed to the fixed frame by spring plates 8. The hydraulic cylinder 12 and the working sensor are mounted between the mounting plate of the moving frame 7 and the fixed frame frame 13 via a tie rod. The hydraulic cylinder 12 is connected to the proportional valve 10, which is controlled to open and close by a servo amplifier. The preload sensor 11 is located between the hydraulic cylinder 12 and the fixed frame frame 13. The working sensor is fixed between the mounting plate on the lower side of the fixed frame and the fixed frame frame 13 via a tie rod. The working sensor and the preload sensor 11 are respectively connected to the host computer 3. The analog input module is integrated inside the servo motor 1. The servo motor 1 is connected to the PLC controller, which is connected to the host computer 3.

[0034] The host computer 3 sends a control signal to the servo amplifier, which amplifies the signal and drives the proportional pressure relief valve to change the output force of the hydraulic cylinder 12, thereby loading the specified preload force. The hydraulic station 9 provides hydraulic oil with pressure and flow rate that meet the usage requirements, and the pressure is stable and meets the oil quality requirements. At the same time, the dynamic loading force value programmed in the host computer 3 software is transmitted to the servo motor 1 through the PLC control module and analog input module. The servo motor 1 moves the push rod cylinder 2 to generate a forward and backward displacement, and the dynamic force acts on the moving frame 7. At this time, the force values ​​of the preload sensor 11 and the working sensor are transmitted to the back-end data acquisition computer via the network.

[0035] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A programmable standard dynamic thrust control system, suitable for measuring of a movable frame, wherein a spring sheet is connected between the movable frame and a fixed frame support, characterized in that, The movable frame top surface is provided with a bearing disc, and the bottom surface is provided with a first baffle and a second baffle at intervals; The push rod cylinder is connected with a servo motor, and one end of the push rod cylinder towards the bearing disc is connected with a loading disc; the push rod cylinder is installed on the cylinder support, and the cylinder support is in contact with the fixed frame; The fixed frame is provided with a fixed frame at a preset position, and a hydraulic cylinder is installed between the fixed frame and the first baffle through a first elastic pull rod, one end of the first elastic pull rod is connected with the fixed frame, the other end is connected with the first baffle and is provided with a preloaded force sensor; a second elastic pull rod is installed between the fixed frame and the first baffle, and a working sensor is installed on the second elastic pull rod; The hydraulic cylinder is connected with a hydraulic station through a pipeline for adjusting the hydraulic quantity; The controller is at least in communication connection with the hydraulic station, the hydraulic cylinder, the push rod cylinder, the working sensor and the preloaded force sensor, wherein: When the push rod cylinder drives the loading disc to transmit an initial force value to the bearing disc, the hydraulic quantity of the hydraulic station to the hydraulic cylinder is adjusted according to the feedback data of the working sensor and the preloaded force sensor to avoid the occurrence of zero drift of the movable frame, ensure the accuracy of real-time measurement of the dynamic force change rule of the movable frame, and a valve is installed on the pipeline close to the outlet position of the hydraulic station; Further comprising a servo amplifier, the hydraulic station and the controller are electrically connected through the servo amplifier, and the control method of the controller comprises: the controller acquires the first force, the second force and the adjustment parameter of the proportional valve feedback by the working sensor and the preloaded force sensor in real time, judges whether the first force reaches a preset value, the preset value is related to the structural stiffness of the high-altitude cabin experiment system, if yes, the servo amplifier does not act, and the controller records the value of the first force, if not, the liquid supply ratio of the hydraulic station is controlled to drive the hydraulic cylinder to adjust the first force feedback by the working sensor to be the same as the preset value.

2. The programmable standard dynamic thrust control system of claim 1, wherein, The valve is a proportional valve.

3. The programmable standard dynamic thrust control system of claim 2, wherein, The control method of the controller further comprises: When the first force feedback by the working sensor is the same as the preset value, it is judged whether the second force is zero, if yes, the controller controls the loading disc to load a predetermined dynamic force, and the bearing disc is pushed to perform the test according to the design requirement, if not, the controller controls the dynamic force of the loading disc until the second force is zero, and the bearing disc is pushed to perform the test.

4. The programmable standard dynamic thrust control system of claim 3, wherein, The controller is connected with an upper computer, receives different design values transmitted by the upper computer, and measures the dynamic force change rule of the movable frame in real time in different states.

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