topic 回复： AMMCLIB COS_FLT wave fault in Model-Based Design Toolbox (MBDT) https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/AMMCLIB-COS-FLT-wave-fault/m-p/2146541#M10380 The input can be -pi ~pi ，I think. Tue, 05 Aug 2025 03:59:44 GMT Chris_Tigger 2025-08-05T03:59:44Z AMMCLIB COS_FLT wave fault https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/AMMCLIB-COS-FLT-wave-fault/m-p/2146276#M10379 <P>Hi,&nbsp;</P><P><SPAN>I've encountered a very strange problem. When using the Simulink model of the AMMCLIB library, the output of the floating-point cosine function has spikes. Why is this? I can use the sin function and the cos function in the Simulink standard library normally.I hope to get your help.</SPAN></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Chris_Tigger_0-1754322560482.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/350829i736C52DC73E62B65/image-size/medium?v=v2&amp;px=400" role="button" title="Chris_Tigger_0-1754322560482.png" alt="Chris_Tigger_0-1754322560482.png" /></span></P><P>matlab version : 2025a</P><P>AMMCLIB version: 1.1.22</P> Mon, 04 Aug 2025 15:52:22 GMT https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/AMMCLIB-COS-FLT-wave-fault/m-p/2146276#M10379 Chris_Tigger 2025-08-04T15:52:22Z 回复： AMMCLIB COS_FLT wave fault https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/AMMCLIB-COS-FLT-wave-fault/m-p/2146541#M10380 The input can be -pi ~pi ，I think. Tue, 05 Aug 2025 03:59:44 GMT https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/AMMCLIB-COS-FLT-wave-fault/m-p/2146541#M10380 Chris_Tigger 2025-08-05T03:59:44Z