Washing machine magnetic variable damping vibration attenuation control method
A control method and variable damping technology, which is applied to the control device of washing machines, other washing machines, shock absorbers, etc., can solve the problems of not being able to obtain damping force, etc., and achieve the effect of weakening vibration and avoiding resonance
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Embodiment 1
[0034] Such as figure 1 As shown, this embodiment increases the process of real-time detection, and optimizes the input current value in real time, so that the actual damping force is as close as possible to the required damping force, and the vibration is weakened to the greatest extent while avoiding the vibration of the entire system caused by the vibration components. resonance, the steps of the control method are as follows:
[0035] Step 1: The sensor unit detects the vibration signal, determines the amplitude A, compares the detected amplitude A with the preset amplitude A', if A<A', maintains the current state, and if A≥A', enters the next step;
[0036]Step 2: The main control board detects the real-time speed n of the motor, and at the same time calls the target speed N set by the program, calculates the speed difference ΔN, and compares the detected and calculated speed difference ΔN with the preset speed difference ΔN' , if ΔN<ΔN', maintain the current state, if Δ...
Embodiment 2
[0047] In this embodiment, on the basis of determining the magnitude of the damping force with the magnitude of the current, the influence of the speed of the motor (that is, the moving speed of the shock absorber) on the damping force is considered, and the optimization of the current maximizes the actual damping force Close to the required damping force, the washing machine is segmented as a whole according to the rotation speed, and on the basis of the segmented control, real-time control is carried out for each working state segment of the segmented control. In real-time control, the magnitude of the damping force can be determined according to the detected motor speed difference ΔN and the magnitude of the vibration, and the magnitude of the required current can be determined according to the actual speed N. Real-time optimal adjustment of the current.
[0048] Such as figure 2 As shown, according to the working process of the washing machine and the motor speed, the wo...
Embodiment 3
[0063] Such as Figure 4 As shown, the magnetic variable damping shock absorber in this embodiment includes: a housing 1, a piston 2, an electromagnet 3 and other components. Wherein the damping chamber 10 and the buffer chamber 8 form a shock absorber cylinder. The buffer cavity 8 communicates with the outside world, and the damping cavity 10 is filled with magnetic fluid. The magnetic fluid is composed of ferromagnetic solid particles, mother liquid oil and stabilizer. An electromagnet and an orifice for the flow of magnetic fluid are provided in the piston. The electromagnet 3 is connected to the main control board through the wire 6 in the piston rod 4. The main control board controls the magnitude of the current and utilizes the strong magnetism of the electromagnet Weak changes change the fluidity of the magnetic fluid so as to adjust the damping in real time.
[0064]At the same time, the main control board is connected with the functional components, and the size of...
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