| dbo:abstract |
In control theory, input shaping is an open-loop control technique for reducing vibrations in computer-controlled machines. The method works by creating a command signal that cancels its own vibration. That is, a vibration excited by previous parts of the command signal is cancelled by vibration excited by latter parts of the command. Input shaping is implemented by convolving a sequence of impulses, known as an input shaper, with any arbitrary command. The shaped command that results from the convolution is then used to drive the system. If the impulses in the shaper are chosen correctly, then the shaped command will excite less residual vibration than the unshaped command. The amplitudes and time locations of the impulses are obtained from the system's natural frequencies and damping ratios. Shaping can be made very robust to errors in the system parameters. (en) 輸入信號整形（Input Shaping）是數控機床中減少振動的開環控制技術，其作法是產生一命令信號來消除其自身的振動。較早命令信號產生的振動會由後面命令信號產生的振動所抵消。輸入信號整形的作法是將脈衝（稱為輸入整形器）和任意命令信號進行卷積。接著用整形後的命令來驅動系統。若整形器的脈衝選擇得當的話，整形後的命令產生的殘餘振動會比原始命令的振動要小。脈衝的振幅以及時間會依照系統的自然振動頻率以及阻尼比決定。輸入信號整形可以調整到對系統參數的誤差有高強健性。 (zh) |
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http://www.contlab.eu/en/zv4is-demo |
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dbr:Vibration dbr:Convolution dbr:Errors_and_residuals dbr:Open-loop_controller dbr:Control_system dbr:Control_theory dbc:Cybernetics dbc:Mechanical_vibrations dbr:Gantry_crane dbr:Amplitude dbc:Control_theory dbr:Damping_ratio dbr:Parameter dbr:Wave_interference dbc:Dynamics_(mechanics) dbr:Robustness_(computer_science) dbr:Impulse_response dbr:Computer_numerical_control |
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dbc:Cybernetics dbc:Mechanical_vibrations dbc:Control_theory dbc:Dynamics_(mechanics) |
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dbr:Technique |
| rdf:type |
dbo:TopicalConcept |
| rdfs:comment |
輸入信號整形（Input Shaping）是數控機床中減少振動的開環控制技術，其作法是產生一命令信號來消除其自身的振動。較早命令信號產生的振動會由後面命令信號產生的振動所抵消。輸入信號整形的作法是將脈衝（稱為輸入整形器）和任意命令信號進行卷積。接著用整形後的命令來驅動系統。若整形器的脈衝選擇得當的話，整形後的命令產生的殘餘振動會比原始命令的振動要小。脈衝的振幅以及時間會依照系統的自然振動頻率以及阻尼比決定。輸入信號整形可以調整到對系統參數的誤差有高強健性。 (zh) In control theory, input shaping is an open-loop control technique for reducing vibrations in computer-controlled machines. The method works by creating a command signal that cancels its own vibration. That is, a vibration excited by previous parts of the command signal is cancelled by vibration excited by latter parts of the command. Input shaping is implemented by convolving a sequence of impulses, known as an input shaper, with any arbitrary command. The shaped command that results from the convolution is then used to drive the system. If the impulses in the shaper are chosen correctly, then the shaped command will excite less residual vibration than the unshaped command. The amplitudes and time locations of the impulses are obtained from the system's natural frequencies and damping rat (en) |
| rdfs:label |
Input shaping (en) 輸入信號整形 (zh) |
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