Device and method for testing and adjusting unbalanced force of operating device under unidirectional acceleration

Abstract

This invention belongs to the field of mechanical control system design technology, specifically relating to a device and method for testing and adjusting the unbalanced force of a control device under unidirectional acceleration. The device includes a displacement sensor, a load mechanism, a counterweight, a test bench, and a force sensor. The control device includes a load mechanism, a control stick, and a connecting rod. One end of the load mechanism is mounted on the test bench, and the other end is connected to the control stick. The counterweight is connected to the control stick via the connecting rod. The control stick is equipped with a test control point and a force sensor. This invention can conveniently test and adjust the unbalanced force of the control system using a ground tooling bench and an external force sensor.

Description

Technical Field

[0001] This invention belongs to the field of mechanical control system design technology, specifically relating to an invention entitled: a device and method for testing and adjusting the unbalanced force of a control device under unidirectional acceleration. Background Technology

[0002] The rocker arm assembly and linkage are important components of the aircraft control system, with the rocker arm and linkage acting as moving parts within the system. In fly-by-wire aircraft pilot control systems, current methods for measuring and adjusting the unbalanced forces of the pilot control subsystem under a specific unidirectional acceleration involve mounting the entire system on an acceleration test bench and conducting acceleration tests. However, for pilot control systems with numerous transmission nodes, the transmission chain from the output drive arm to the end driven arm is long and widely distributed. Mounting the entire system on an acceleration test bench is costly, risky, and limited by the size of the acceleration test bench, making it difficult to conduct overall system testing. Furthermore, adjusting the unbalanced forces during acceleration testes presents certain difficulties. Summary of the Invention

[0003] The purpose of this invention:

[0004] To verify the accuracy of the theoretical estimation of the mass characteristics of the system under a certain unidirectional acceleration, this invention provides a device and method for testing and adjusting the unbalanced force of the control device under unidirectional acceleration. This device can conveniently test and adjust the unbalanced force of the control system using a ground tooling stand and an external force sensor.

[0005] The technical solution of this invention:

[0006] The unbalanced force testing and adjustment device for the control device under unidirectional acceleration includes a displacement sensor 1, a load mechanism 2, a counterweight 3, a test bench 5, and a force sensor 6. The control device includes the load mechanism 2, a control stick, and a connecting rod. One end of the load mechanism 2 is mounted on the test bench 5, and the other end is connected to the control stick. The counterweight 3 is connected to the control stick through a connecting rod. The control stick is equipped with a test control point and the force sensor 6.

[0007] Furthermore, the bottom surface of the test bench 5 is a horizontal mounting surface, and the sides are vertical mounting surfaces.

[0008] A method for testing and adjusting the unbalanced force of a control device under unidirectional acceleration, performed using the aforementioned device, includes the following steps:

[0009] Step 1: Place the test bench 5 on the ground with the horizontal mounting surface facing down, and install the control device to be tested on the test bench 5. During the installation process, use the load mechanism to support the control stick and the linkage to keep them in a neutral position. After the installation is completed, remove the load mechanism 2 from the control device.

[0010] Step 2: Place the test bench 5 on the ground with the vertical mounting surface facing down, and make preliminary adjustments to the weight of the counterweight so that the weight of the counterweight and the equivalent weight of the control device are initially balanced in the unidirectional acceleration direction. The basis for the initial balance is that the unbalanced force of the control device is less than the frictional force of the control device, and the control device achieves initial balance in the neutral position.

[0011] Step 3: Flexibly connect the force sensor 6 to the test control point of the control stick of the control device to ensure that the weight of the force sensor will not affect the measurement effect. Push the control stick from front to back in the acceleration direction with the force sensor and record the force sensor value F1; push the control stick from back to front in the acceleration direction with the force sensor and record the force sensor value F2. Calculate the value A of |F1-F2|.

[0012] Step 4: Using the weight of the counterweight in Step 3 as a benchmark, increase the weight of the counterweight in the smallest increments.

[0013] Step 5: Repeat step 3 to obtain the force sensor value F1 when the control stick is pushed from front to back in the acceleration direction, and the force sensor value F2 when the control stick is pushed from back to front in the acceleration direction. Calculate the value B of |F1-F2|.

[0014] Step 6: Using the weight of the counterweight in Step 3 as a benchmark, reduce the weight of the counterweight by the smallest increment.

[0015] Step 7: Repeat step 3 to obtain the force sensor value F1 when the control stick is pushed from front to back in the acceleration direction, and the force sensor value F2 when the control stick is pushed from back to front in the acceleration direction. Calculate the value C of |F1-F2|.

[0016] Step 8: Determine the values ​​of A, B, and C to determine the weight of the counterweight that can achieve mass balance of the control device.

[0017] Furthermore, the unbalanced force of the control device refers to the unbalanced force generated in the direction of acceleration due to the weight difference between the two ends of the connecting rod with the intermediate hinge point.

[0018] Furthermore, the frictional force of the control device refers to the frictional force at each rotating hinge point caused by the installation or contact of the rotating pair.

[0019] Furthermore, in step 8, when the value A is at its minimum, it can be considered that the unbalanced force adjustment of the control device under unidirectional acceleration has been completed, and the weight of the counterweight block corresponding to step 3 can achieve the mass balance of the control device.

[0020] Furthermore, in step 8, when the value B is at its minimum, the weight of the counterweight block adjusted in step 4 is used as the benchmark, and the weight of the counterweight block is increased step by step according to the minimum increment. After each adjustment of the counterweight block, step 3 is repeated. After each adjustment of the counterweight block, a value of |F1-F2| is obtained. When |F1-F2| is at its minimum, it can be regarded as the completion of the unbalanced force adjustment of the control device under unidirectional acceleration. At this time, the weight of the counterweight block can achieve the mass balance of the control device.

[0021] Furthermore, in step 8, when the value C is at its minimum, the weight of the counterweight after adjustment in step 6 is used as the benchmark, and the weight of the counterweight is gradually reduced in stages according to the minimum increment. After each adjustment of the counterweight, step 3 is repeated. After each adjustment of the counterweight, a value of |F1-F2| is obtained. When |F1-F2| is at its minimum, it can be considered that the unbalanced force adjustment of the control device under unidirectional acceleration is completed. At this time, the weight of the counterweight can achieve the mass balance of the control device.

[0022] The beneficial effects of this invention are:

[0023] This invention provides a device and method for testing and adjusting the unbalanced force of a control device under unidirectional acceleration. By using a double-sided mounting platform and force / displacement sensors, combined with the rational utilization of the Earth's gravitational acceleration, it effectively avoids the dependence on and limitations of acceleration test benches when conducting unbalanced force tests and adjustments for large control systems. It allows for the testing and adjustment of unbalanced forces in large-sized and dispersed control systems within a relatively static and safe ground testing environment. Attached Figure Description

[0024] Figure 1 This is an implementation diagram of the unbalanced force testing and adjustment device of the present invention under unidirectional acceleration, and the unbalanced force testing and adjustment method under unidirectional acceleration.

[0025] Reference numerals: 1. Control stick; 2. Loading mechanism; 3. Counterweight; 4. Linkage rod; 5. Test bench; 6. Force sensor. Detailed Implementation

[0026] like Figure 1As shown, this invention proposes a device for testing and adjusting the unbalanced force of a control device under unidirectional acceleration. Using a test bench that can be safely placed on both horizontal and vertical mounting surfaces, unidirectional acceleration is simulated using the Earth's 1G gravitational acceleration, and a force sensor is employed to test the unbalanced force of the system. When the horizontal mounting surface of the bench faces the ground, it is primarily used for the installation and adjustment of the driver's control device on the test bench. When the vertical mounting surface of the bench faces the ground, it is used for measuring and adjusting the unbalanced force of the driver's control device that requires mass balance.

[0027] The present invention relates to an unbalanced force testing and adjustment device for a control device under unidirectional acceleration, comprising a displacement sensor 1, a load mechanism 2, a counterweight 3, a test bench 5, and a force sensor 6. The control device includes the load mechanism 2, a control stick, and a connecting rod. One end of the load mechanism 2 is mounted on the test bench 5, and the other end is connected to the control stick. The counterweight 3 is connected to the control stick via a connecting rod. The control stick is provided with a test control point and the force sensor 6. The bottom surface of the test bench 5 is a horizontal mounting surface, and the side surface is a vertical mounting surface.

[0028] A method for testing and adjusting the unbalanced force of a control device under unidirectional acceleration, performed using the aforementioned device, includes the following steps:

[0029] Step 1: Place the test bench 5 on the ground with the horizontal mounting surface facing down, and install the control device to be tested on the test bench 5. During the installation process, use the load mechanism to support the control stick and the linkage to keep them in a neutral position. After the installation is completed, remove the load mechanism 2 from the control device.

[0030] Step 2: Place the test bench 5 on the ground with its vertical mounting surface facing down, and make preliminary adjustments to the weight of the counterweight so that the weight of the counterweight and the equivalent weight of the control device are initially balanced in the unidirectional acceleration direction. The basis for the initial balance is that the unbalanced force of the control device is less than the frictional force of the control device, and the control device achieves initial balance in the neutral position.

[0031] The unbalanced force of the control device refers to the unbalanced force generated in the direction of acceleration due to the weight difference between the two ends of the connecting rod with the intermediate hinge point; the frictional force of the control device refers to the frictional force caused by the installation or contact of the rotating joint at each rotating hinge point.

[0032] Step 3: Flexibly connect the force sensor 6 to the test control point of the control stick of the control device to ensure that the weight of the force sensor will not affect the measurement effect. Push the control stick from front to back in the acceleration direction with the force sensor and record the force sensor value F1; push the control stick from back to front in the acceleration direction with the force sensor and record the force sensor value F2. Calculate the value A of |F1-F2|.

[0033] Step 4: Using the weight of the counterweight in Step 3 as a benchmark, increase the weight of the counterweight in the smallest increments.

[0034] Step 5: Repeat step 3 to obtain the force sensor value F1 when the control stick is pushed from front to back in the acceleration direction, and the force sensor value F2 when the control stick is pushed from back to front in the acceleration direction. Calculate the value B of |F1-F2|.

[0035] Step 6: Using the weight of the counterweight in Step 3 as a benchmark, reduce the weight of the counterweight by the smallest increment.

[0036] Step 7: Repeat step 3 to obtain the force sensor value F1 when the control stick is pushed from front to back in the acceleration direction, and the force sensor value F2 when the control stick is pushed from back to front in the acceleration direction. Calculate the value C of |F1-F2|.

[0037] Step 8: Determine the size of values ​​A, B, and C.

[0038] When the value A is at its minimum, it can be considered that the unbalanced force adjustment of the control device under unidirectional acceleration is completed, and the weight of the counterweight corresponding to step 3 can realize the mass balance of the control device.

[0039] When the value B is at its minimum, the weight of the counterweight after adjustment in step 4 is used as the benchmark. The weight of the counterweight is increased step by step according to the minimum increment. After each adjustment of the counterweight, step 3 is repeated. After each adjustment of the counterweight, a value of |F1-F2| is obtained. When |F1-F2| is at its minimum, it can be regarded as the completion of the unbalanced force adjustment of the control device under unidirectional acceleration. At this time, the weight of the counterweight can achieve the mass balance of the control device.

[0040] When the value C is at its minimum, the weight of the counterweight after adjustment in step 6 is used as the benchmark. The weight of the counterweight is gradually reduced in increments of the minimum increment. After each adjustment of the counterweight, step 3 is repeated. After each adjustment of the counterweight, a value of |F1-F2| is obtained. When |F1-F2| is at its minimum, it can be considered that the unbalanced force adjustment of the control device under unidirectional acceleration is completed. At this time, the weight of the counterweight can achieve the mass balance of the control device.

[0041] This invention, through the double-sided mounting of the test bench and the use of force / displacement sensors, combined with the rational utilization of the Earth's gravitational acceleration, effectively avoids the dependence on and limitations of acceleration test benches when conducting unbalanced force tests and adjustments for large control systems. It allows for the testing and adjustment of unbalanced forces in large-sized, dispersed control systems within a relatively static and safe ground testing environment.

Claims

1. A method for testing and adjusting the unbalanced force of a control device under unidirectional acceleration, performed using an unbalanced force testing and adjustment device, characterized in that... The unbalanced force testing and adjustment device includes a displacement sensor, a load mechanism, and a counterweight; a test bench, a force sensor, and a control device including a control stick and a connecting rod. One end of the load mechanism is mounted on the test bench, and the other end is connected to the control stick. The counterweight is connected to the control stick via a connecting rod. The control stick is equipped with a test control point and a force sensor. The bottom surface of the test bench is a horizontal mounting surface, and the sides are vertical mounting surfaces. The unbalanced force test adjustment method includes the following steps: Step 1: Place the test bench on the ground with the horizontal mounting surface facing down. Install the control device to be tested on the test bench. During the installation process, use the load mechanism to support the control stick and linkage to keep them in a neutral position. After the installation is completed, remove the load mechanism from the control device. Step 2: Place the test bench on the ground with the vertical mounting surface facing down, and make preliminary adjustments to the weight of the counterweight so that the weight of the counterweight and the equivalent weight of the control device are initially balanced in the unidirectional acceleration direction. The basis for the initial balance is that the unbalanced force of the control device is less than the frictional force of the control device, and the control device achieves initial balance in the neutral position. Step 3: Flexibly connect the force sensor to the test control point of the control stick of the control device to ensure that the weight of the force sensor will not affect the measurement effect. Push the control stick from front to back in the acceleration direction with the force sensor and record the force sensor value F1; push the control stick from back to front in the acceleration direction with the force sensor and record the force sensor value F2. Calculate the value A of |F1-F2|. Step 4: Using the weight of the counterweight in Step 3 as a benchmark, increase the weight of the counterweight in the smallest increments. Step 5: Repeat step 3 to obtain the force sensor value F1 when the control stick is pushed from front to back in the acceleration direction, and the force sensor value F2 when the control stick is pushed from back to front in the acceleration direction. Calculate the value B of |F1-F2|. Step 6: Using the weight of the counterweight in Step 3 as a benchmark, reduce the weight of the counterweight by the smallest increment. Step 7: Repeat step 3 to obtain the force sensor value F1 when the control stick is pushed from front to back in the acceleration direction, and the force sensor value F2 when the control stick is pushed from back to front in the acceleration direction. Calculate the value C of |F1-F2|. Step 8: Determine the values ​​of A, B, and C to determine the weight of the counterweight that can achieve the mass balance of the control device. In step 8, when the value of A is the smallest, it can be considered that the unbalanced force adjustment of the control device under unidirectional acceleration has been completed. The weight of the counterweight corresponding to step 3 can achieve the mass balance of the control device. The unbalanced force of the control device refers to the unbalanced force generated in the direction of acceleration due to the weight difference between the two ends of the connecting rod with the intermediate hinge point. The frictional force of a control device refers to the frictional force at each rotating hinge point caused by the installation or contact of the rotating pair.

2. The method for testing and adjusting the unbalanced force of the control device under unidirectional acceleration according to claim 1, characterized in that: In step 8, when the value B is at its minimum, the weight of the counterweight after adjustment in step 4 is used as the benchmark. The weight of the counterweight is increased step by step according to the minimum increment. After each adjustment of the counterweight, step 3 is repeated. After each adjustment of the counterweight, a value of |F1-F2| is obtained. When |F1-F2| is at its minimum, it can be regarded as the completion of the unbalanced force adjustment of the control device under unidirectional acceleration. At this time, the weight of the counterweight can achieve the mass balance of the control device.

3. The method for testing and adjusting the unbalanced force of the control device under unidirectional acceleration according to claim 2, characterized in that: In step 8, when the value C is at its minimum, the weight of the counterweight after adjustment in step 6 is used as the benchmark. The weight of the counterweight is gradually reduced in increments of the minimum increment. After each adjustment of the counterweight, step 3 is repeated. After each adjustment of the counterweight, a value of |F1-F2| is obtained. When |F1-F2| is at its minimum, it can be considered that the unbalanced force adjustment of the control device under unidirectional acceleration is completed. At this time, the weight of the counterweight can achieve the mass balance of the control device.

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