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Scope

Sinks

uPlotDisplay 方块是一个超高性能、交互式的实时信号曲线绘制组件，可直接嵌入仿真原理图画布中进行可视化分析。它依托轻量级 uPlot 图表渲染引擎，能够在浏览器中无延迟、极其流畅地实时呈现数十万甚至上百万个离散数据采样点。

该方块作为数据接收端（Sink），支持在其输入端口上同时接入多路时变信号，以便在同一图表中直接进行动态对比。

数学模型

y(t) = \text{可视化呈现 } u_1(t), u_2(t), \dots, u_n(t)

Direction	ID	Label	类型	Status
→ In	`signal`	Signal	number	Required

参数	Label	类型	默认值	描述
`title`	Title	text	`Signal Plot`
`viewportMode`	Time window	select	`expanding`
`windowDuration`	Window duration (s)	number	`10`
`renderMode`	Update mode	select	`timebased`
`updateFrequencyHz`	Refresh rate (Hz)	number	`10`	How often the plot updates visually when in Time-based mode.
`maxPoints`	Max display points	number	`500000`	Limit the number of points drawn to prevent performance drops.
`useAutoY`	Auto-scale Y-axis	boolean	`true`	Automatically adjust the Y-axis to fit all visible data.
`yMin`	Y-axis minimum	number	`-1`
`yMax`	Y-axis maximum	number	`1`
`lineWidth`	Line width	number	`2.5`
`showGrid`	Show grid	boolean	`true`
`showLegend`	Show legend	boolean	`false`
`showPoints`	Show points	boolean	`false`
`showStatistics`	Show statistics	boolean	`false`	Display min, max, and mean values.
`triggerEnabled`	Trigger	boolean	`false`	Stabilise periodic waves by aligning the window to a level crossing (time-domain, rolling only).
`triggerSource`	Trigger source (signal index)	number	`0`	Which input signal triggers (0 = first).
`triggerLevel`	Trigger level	number	`0`	Amplitude threshold for the trigger crossing.
`triggerEdge`	Trigger edge	select	`rising`	Detect crossings on the rising or falling edge.
`xyXChannel`	XY: X signal index	number	`0`	In XY mode, which input signal is the X axis (0 = first).
`xyYChannel`	XY: Y signal index	number	`1`	In XY mode, which input signal is the Y axis.

将阶跃信号接入受控对象，直观实时监视控制回路的过渡过程与超调量：

Step → PIDController → 被控对象 → uPlotDisplay

将两个正交且存在相位差的正弦波进行 XY 轨迹绘制：

正弦信号 1 (X) ──┐
                 ├── uPlotDisplay (renderMode: "xy")
正弦信号 2 (Y) ──┘